CN111385027B

CN111385027B - Optical transceiver module, signal light management method and device, and PON system

Info

Publication number: CN111385027B
Application number: CN201811643603.8A
Authority: CN
Inventors: 杨巍; 杨波; 黄新刚
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2022-11-08
Anticipated expiration: 2038-12-29
Also published as: WO2020135662A1; CN111385027A

Abstract

The invention provides an optical transceiver module, a signal light management method and device and a PON system. Specifically, the optical transceiver module includes: the method comprises the following steps: a transmitting device Tx, a receiving device Rx, wherein the optical transceiver module further comprises: a first splitter, respectively connected to the optical network device, the Tx and the Rx, for splitting signal light from the Tx and the optical network device; and the first optical Etalon is positioned between the first beam splitter and the Rx and is used for carrying out full transmission on the first beam splitting light of the signal light from the optical network equipment after being split by the first beam splitter and outputting the first beam splitting light to the Rx.

Description

Optical transceiver module, signal light management method and device, and PON system

Technical Field

The present invention relates to the field of communications, and in particular, to an optical transceiver module, a method and an apparatus for managing signal light, and a PON system.

Background

With the continuous improvement of bandwidth demand and delay requirement of users and the requirement of low delay brought by 5G bearing, capacity needs to be improved and delay needs to be reduced in the access field. Wavelength division multiplexing passive optical networks (WDM PONs) are a good choice for high capacity and low latency. WDM PON can share one wavelength channel per user independently, thus avoiding the delay associated with time division multiplexing. And as the modulation rate of a single wavelength is increased, the bandwidth of each user can be increased continuously. Fig. 1 is a system block diagram of a WDM PON employed in the related art. As shown in fig. 1, each ONU and the OLT use a pair of wavelengths (λ d, λ u) in the uplink and downlink, and different uplink and downlink wavelengths are combined by a Wavelength Division Multiplexer (WDM) and enter a trunk optical fiber. WDM can be implemented using Arrayed Waveguide Gratings (AWGs). Typically, both the upstream and downstream wavelengths are located at the center of the transmission window of each port of the AWG. Fig. 2 is a schematic diagram of the uplink and downlink wavelengths at the transmission windows of the AWG in the related art. As shown in fig. 2, it is assumed that there are n wavelength channels in the uplink and downlink, and each wavelength channel interval is denoted as Δ f. For the same pair of uplink and downlink wavelengths, which pass through the same AWG port, the wavelength that can pass through one AWG port is periodic, and the period becomes the Free Spectral Range (FSR), so the uplink and downlink wavelength interval is FSR. In this way, the total occupied band resource is 2n Δ f. The logarithm n of the wavelength of wdm pon is generally 32 or higher, and in the optical communication field where the wavelength resources are so scarce, the occupied wavelength resources are too much, and improvement is required. Therefore, the related art has a problem that the uplink and downlink light having a close wavelength interval is difficult to be separated.

Disclosure of Invention

The embodiment of the invention provides an optical transceiver module, a signal light management method and device and a PON system, which are used for solving the problem that uplink and downlink light with a close wavelength interval are difficult to separate in the related technology.

According to an embodiment of the present invention, there is provided an optical transceiver module including: -transmitting means Tx, -receiving means Rx, characterized in that said optical transceiver module further comprises: a first splitter, respectively connected to the optical network device, the Tx and the Rx, for splitting signal light from the Tx and the optical network device; the first optical Etalon is positioned between the first beam splitter and the Rx and is used for performing full transmission on first split light split by the first beam splitter of signal light from the optical network equipment and outputting the first split light to the Rx; wherein the first beam splitter is a 50/50 power beam splitter.

Optionally, the optical transceiver component further comprises: and the isolator is positioned between the Tx and the first beam splitter and is used for isolating second split light obtained by splitting the signal light from the optical network equipment by the first beam splitter.

Optionally, the optical transceiver component further comprises: the second Etalon is positioned between the isolator and the first beam splitter and is used for transmitting all signal light which meets a preset wavelength energy threshold value in the signal light emitted by the Tx and transmitting the signal light to the first beam splitter; and totally reflecting the signal light which does not meet the preset wavelength energy threshold value in the signal light transmitted by the Tx, and transmitting the signal light to the isolator for isolation.

Optionally, the optical transceiver module further comprises: the second beam splitter is connected with the first beam splitter and used for splitting third split light after the signal light from the Tx passes through the first beam splitter; and the first light detector PD1 is connected with the second beam splitter and used for detecting the fourth beam split by the second beam splitter to generate a first detection result.

Optionally, the optical transceiver module further comprises: and the third Etalon is connected with the second beam splitter and used for filtering fifth beam splitting light split by the second beam splitter, wherein the filtering mode comprises the following steps: performing transmission treatment and/or reflection treatment on the fifth beam light; and the second light detector PD2 is connected with the third Etalon and is used for acquiring the filtered fifth beam light and generating a second detection result.

Optionally, the optical transceiver component further comprises: a processor, respectively connected to the Tx, the PD1, and the PD2, for adjusting the temperature of the Tx according to the first and the second probing results.

Optionally, etalon is two parallel-arranged flat plates with the ability to transmit and/or transmit incoming optical signals.

According to an embodiment of the present invention, there is provided a method for managing signal light, which is applied to the above-mentioned optical transceiver module, the method includes: receiving the first detection result sent by the PD1, and determining the power P1 corresponding to the fourth beam of light; receiving the first detection result sent by the PD2, and determining power P2 corresponding to the fifth beam of light after filtering; comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of Etalon; and according to the comparison result, sending indication information for adjusting the laser temperature corresponding to the Tx.

Optionally, before comparing the power ratio to the reference ratio, the method further comprises: acquiring a transmittance curve and a standard transmission wavelength of the third Etalon; and calculating the slope of the standard transmission wavelength on the transmittance curve.

Optionally, when the slope is not 0, sending, to the Tx according to the comparison result, indication information for adjusting the laser temperature, including: transmitting first indication information for increasing the laser temperature to the Tx when the power ratio is less than the reference ratio; transmitting second indication information for reducing the laser temperature to the Tx when the power ratio is greater than the reference ratio.

Optionally, when the slope is equal to 0, the method further comprises: acquiring temperature information corresponding to a plurality of specified temperatures sent by Tx; calculating the power ratio according to the temperature information corresponding to the specified temperature; comparing power ratios corresponding to the designated temperatures, and determining a target temperature with the minimum power ratio; transmitting third indication information for adjusting the laser temperature to the target temperature to the Tx.

According to an embodiment of the present invention, there is provided a signal light management device applied to the above optical transceiver module, the device including: the first receiving module is used for receiving the first detection result sent by the PD1 and determining the power P1 corresponding to the fourth beam of light; the second receiving module is used for receiving the first detection result sent by the PD2 and determining the power P2 corresponding to the filtered fifth beam of light; the comparison module is used for comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of Etalon; and the indicating module is used for sending indicating information for adjusting the temperature of the laser corresponding to the Tx according to the comparison result.

According to still another embodiment of the present invention, there is also provided a passive optical network system PON including: the optical line terminal OLT, the optical network unit ONU and the wavelength division multiplexer WDM, wherein, the OLT is connected with the WDM through the optical transceiver module.

According to still another embodiment of the present invention, there is also provided a passive optical network system PON including: the optical network unit comprises an optical line terminal OLT, an optical network unit ONU and a wavelength division multiplexer WDM, wherein the ONU is connected with the WDM through the optical transceiving component.

According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.

The invention can solve the problem that the uplink and downlink light with close wavelength intervals are difficult to separate, achieve the separation of the uplink and downlink light with close wavelength intervals, and simultaneously realize the effect of eliminating the crosstalk of interference wavelengths.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

fig. 1 is a system block diagram of a WDM PON employed in the related art;

fig. 2 is a schematic diagram of the uplink and downlink wavelengths at the transmission windows of the AWG in the related art;

FIG. 3 is a block diagram of an optical transceiver module in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of the operation of Etalon according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of wavelength variation of etalon according to an embodiment of the invention;

FIG. 6 is a schematic diagram of a wavelength variation of an optical transceiver module according to an embodiment of the present invention;

FIG. 7 is a block diagram of another optical transceiver module according to an embodiment of the present invention;

FIG. 8 is a block diagram of another optical transceiver module according to an embodiment of the present invention;

FIG. 9 is a block diagram III of another optical transceiver module in accordance with an embodiment of the present invention;

FIG. 10 is a block diagram of another optical transceiver module in accordance with an embodiment of the present invention;

FIG. 11 is a block diagram five of another optical transceiver component in accordance with an embodiment of the present invention;

FIG. 12 is a block diagram six of another optical transceiver module in accordance with an embodiment of the present invention;

fig. 13 is a waveform diagram of chirp management of a signal in accordance with an embodiment of the present invention;

fig. 14 is a waveform diagram of chirp management of another signal in accordance with an embodiment of the present invention;

FIG. 15 is a seventh block diagram of another optical transceiver module in accordance with embodiments of the present invention;

fig. 16 is a block diagram eight of another optical transceiver module according to an embodiment of the present invention;

fig. 17 is a flowchart of a method for managing signal light according to an embodiment of the present invention;

FIG. 18 is a wavelength diagram of a positive slope lock according to an embodiment of the invention;

FIG. 19 is a wavelength diagram of a negative slope lock according to an embodiment of the present invention;

FIG. 20 is a schematic illustration of an extremum-locked wavelength scheme according to an embodiment of the invention;

fig. 21 is a block diagram of a signal light management apparatus according to an embodiment of the present invention;

fig. 22 is a block diagram of a passive optical network system PON according to an embodiment of the present invention;

figure 23 is a schematic illustration of the upstream and downstream wavelengths located at the transmission windows of the AWG's respective ports in accordance with an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

In the present embodiment, an optical transceiver module is provided. Fig. 3 is a block diagram of an optical transceiver module according to an embodiment of the present invention. As shown in fig. 3, the method for connecting with an optical network device includes: -transmitting means Tx32, -receiving means Rx 34, characterized in that said optical transceiver module further comprises:

a first splitter 36, connected to the optical network device, the Tx and the Rx respectively, for splitting the signal light from the Tx and the optical network device; wherein the first beam splitter 36 is a 50/50 power beam splitter;

the first optical Etalon 38 is positioned between the first beam splitter and the Rx, and is used for performing total transmission on first split light after signal light from the optical network equipment passes through the first beam splitter and outputting the first split light to the Rx; wherein the first beam splitter is a 50/50 power beam splitter;

specifically, fig. 4 is a schematic diagram of the operation of Etalon according to an embodiment of the present invention. As shown in fig. 4, etalon is a flat plate with two extremely good plane parallelism, and incident light is reflected multiple times in Etalon by adopting the fabry-perot interference principle, and is finally divided into two parts, namely transmitted light and reflected light. The transmission and reflection wavelength distributions of etalon can be adjusted by appropriate selection of the thickness and refractive index, and the angle of incidence.

Let etalon thickness be l, refractive index be n, two parallel plane reflectivities be R, light incidence included angle be theta, and a transmittance T function can be deduced: (the difference of the optical length 2nl/cos satisfies an integral multiple of the wavelength, tmax, a general integral multiple of the wavelength, rmax)

Wherein:

λ is incident wavelength, it can be seen that the transmittance of etalon varies periodically with wavelength, so etalon can be regarded as a periodic filter, and fig. 5 is a schematic diagram of the wavelength variation of etalon according to the embodiment of the present invention. As shown in fig. 5:

in the figure, the horizontal axis is the wavelength, the vertical axis is the transmittance or the reflectance, the solid line is the transmittance T, the broken line is the reflectance R, the transmittance and the reflectance change periodically along with the wavelength, when the T reaches the maximum value, the R reaches the minimum value, when the R reaches the maximum value, the T reaches the minimum value, when the R reaches the maximum value, the corresponding wavelength is in the middle of the wavelengths corresponding to the two Tmaximum values, and the sum of the T and the R is always 1. By reasonably selecting etalon parameters and incidence angles, T and R intervals can reach the use requirements, such as T peak-to-peak interval of 100GHz, R peak-to-peak interval of 100GHz, and T and R peak-to-peak interval of 50GHz, so that the transmitted light and the received light with the frequency interval of 50GHz can be well separated.

Therefore, in order to ensure the exclusive use of transmitting the first reflected light, the crosstalk of other wavelengths is eliminated by reasonably selecting the parameters l, n, R of Etalon while ensuring that the incident light is normal incidence, i.e., θ =0, to ensure that the Etalon transmittance maximum is aligned with the receiving wavelength.

Fig. 6 is a schematic diagram illustrating a wavelength variation of the optical transceiver module according to the embodiment of the present invention, as shown in fig. 6, where a solid line represents a reflectivity, a dotted line represents a transmittance, and a wavelength varies with etalon. In this embodiment, in order to ensure that the crosstalk elimination of other wavelengths can be achieved, only etalon with the maximum T needs to be selected as the first etalon according to the parameters in the above listed formula.

Fig. 7 is a first block diagram of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 7, the first split beam λ d1 input by the first Etalon in fig. 7 is reflected light obtained by splitting the signal light from the optical network device by the first splitter.

Fig. 8 is a second block diagram of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 8, the first split beam λ d1 input by the first Etalon in fig. 8 is the transmitted light split by the first beam splitter from the signal light of the optical network device.

It should be noted that the functions of the respective components in the optical transceiver module in fig. 7 and 8 are the same in principle, but are adjusted accordingly according to different received lights. The same applies to the following figures and embodiments.

Optionally, in order to prevent the received light from the optical network device from interfering with the Tx, in this embodiment, a receiving component provided with an isolator is also provided.

Fig. 9 is a block diagram three of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 9, in addition to the optical transceiver module in fig. 7, an isolator 92 is further provided between the Tx32 and the first splitter 36.

Fig. 10 is a block diagram four of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 10, in addition to the optical transceiver module in fig. 8, an isolator 1002 is further provided between the Tx32 and the first splitter 36.

An isolator 92, configured to isolate transmitted light obtained by splitting the signal light from the optical network device by the first beam splitter 36.

An isolator 1002, configured to isolate reflected light obtained by splitting the signal light from the optical network device by the first beam splitter 36.

The above-described apparatuses in fig. 9 and 10 can effectively prevent the downstream light from interfering with the Tx.

Fig. 11 is a block diagram of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 11, in addition to the optical transceiver module in fig. 9, a second Etalon 1102 is further provided between the first beam splitter 36 and the isolator 92.

A second Etalon 1102, configured to transmit signal light, which meets a preset wavelength energy threshold, of the signal light emitted by the Tx32, and transmit the signal light to the first beam splitter 36; and totally reflecting the signal light which does not meet the preset wavelength energy threshold value in the signal light emitted by the Tx32, and transmitting the signal light to the isolator 94 for isolation.

Fig. 12 is a block diagram six of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 12, on the basis of the optical transceiver module in fig. 10, a second Etalon1202 is further provided between the first beam splitter 36 and the isolator 304.

A second Etalon1202, configured to perform full transmission on signal light that meets a preset wavelength energy threshold in the signal light emitted by the Tx32, and transmit the signal light to the first beam splitter 36; and totally reflecting the signal light which does not meet the preset wavelength energy threshold value in the signal light emitted by the Tx32, and transmitting the signal light to the isolator 1004 for isolation. In particular, the structures shown in fig. 11 and 12 are mainly applicable in chirp management of signal light. Fig. 13 is a waveform diagram of chirp management of a signal in accordance with an embodiment of the present invention. As shown in fig. 13, the optical spectrum before modulation of the optical signal is a narrow single peak, and after modulation, due to chirped spectral broadening, two peaks appear, where "1" corresponds to a blue-shifted peak (first signal light) and "0" corresponds to a red-shifted peak (second signal light), and as can be seen from the optical spectrum, the power corresponding to "1" is greater than that of "0", and the ratio of the two is the extinction ratio. After the signal is subjected to spectrum shaping, the peak corresponding to '0' is suppressed, the whole spectrum is narrowed, long-distance transmission is facilitated, the power of the signal '0' is reduced, the extinction ratio of the signal is increased, and signal receiving is facilitated.

Specifically, second Etalon 1102 and second Etalon1202 function to filter emitted light from TX32, similar to first Etalon 38 in the figures described above. Fig. 14 is a waveform diagram of chirp management of another signal in accordance with an embodiment of the present invention. As shown in fig. 14, after the emitted light from Tx32 passes through the optical isolator, the wavelength energy corresponding to the modulated optical signal "1" is transmitted through the second Etalon82, and the wavelength energy corresponding to the modulated optical signal "0" is reflected through the second Etalon82, through the

second Etalon

1102 or 1202. While the reflected light enters the isolator 92 or the isolator 1002 for isolation. The spectrum of the transmitted light signal becomes narrow, the long-distance transmission dispersion is reduced, the extinction ratio is increased, and the receiving is facilitated.

Alternatively, fig. 15 is a seventh structural diagram of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 15, the optical transceiver module includes all the structures shown in fig. 7, and further includes: a second beam splitter 1502, a first photodetector PD1 1504, a third Etalon 1506, a second photodetector PD2 1508, and a processor 1510. A second beam splitter 1502 connected to the first beam splitter 36, for splitting reflected light obtained by splitting the signal light from the Tx32 by the first beam splitter 36;

a first photodetector PD1 1504 connected to the second beam splitter 1502, configured to detect the reflected light split by the second beam splitter 1502, and generate a first detection result;

a third Etalon 1506, connected to the second beam splitter 1502, for filtering the transmitted light split by the second beam splitter 1502, where the filtering manner includes: performing transmission treatment and/or reflection treatment on the transmitted light;

a second photo detector PD2 1508, connected to the third Etalon 1506, for obtaining the filtered transmitted light and generating a second detection result;

a processor 1510 connected to the Tx32, the PD1 1504 and the PD2 1508 respectively for adjusting the temperature of the Tx32 according to the first and the second probing results.

Alternatively, fig. 16 is a block diagram eight of another optical transceiver module according to an embodiment of the present invention. As shown in fig. 16, the optical transceiver module includes all the structures shown in fig. 8, and further includes: a second beam splitter 1602, a first photo detector PD1 1604, a third Etalon 1606, a second photo detector PD2 1608, and a processor 1610. A second beam splitter 1602, connected to the first beam splitter 36, for splitting the reflected light of the signal light from the Tx32 after being split by the first beam splitter 36;

a first photo detector PD1 1604 connected to the second beam splitter 1602, configured to detect transmitted light split by the second beam splitter 1602, and generate a first detection result;

a third Etalon 1606, connected to the second beam splitter 1602, configured to filter the reflected light split by the second beam splitter 1602, where the filtering manner includes: performing transmission treatment and/or reflection treatment on the reflected light;

a second photo detector PD2 1608, connected to the third Etalon 1606, for acquiring the filtered reflected light and generating a second detection result;

a processor 1610, connected to the Tx32, the PD1 1604, and the PD2 1608, respectively, for adjusting a temperature of the Tx32 according to the first probing result and the second probing result.

Example 2

In the present embodiment, a method for managing signal light is provided. Fig. 17 is a flowchart of a method for managing signal light according to an embodiment of the present invention. As shown in fig. 17, the optical transceiver module according to embodiment 1 includes:

step S1702, receiving the first detection result sent by the PD1, and determining a power P1 corresponding to the fourth split beam;

step S1704, receiving the first detection result sent by the PD2, and determining power P2 corresponding to the fifth beam of light after filtering;

step 1706, comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of Etalon;

step S1708, according to the comparison result, sending indication information for adjusting the laser temperature corresponding to the Tx.

Optionally, when the slope is not 0, sending indication information for adjusting the laser temperature to the Tx according to the comparison result, including: when the power ratio is smaller than the reference ratio, transmitting first indication information for reducing the laser temperature to the Tx; transmitting second indication information for increasing the laser temperature to the Tx when the power ratio is greater than the reference ratio.

Optionally, when the slope is equal to 0, the method further includes: acquiring temperature information corresponding to a plurality of specified temperatures sent by Tx; calculating the power ratio according to the temperature information corresponding to the specified temperature; comparing power ratios corresponding to the designated temperatures, and determining a target temperature with the minimum power ratio; sending third indication information for adjusting the laser temperature to the target temperature to the Tx.

In order to better understand the technical solution of this embodiment, the following scenario is provided in this embodiment to facilitate understanding of the technical solution of this embodiment.

Scene 1

FIG. 18 is a wavelength diagram of a positive slope lock according to an embodiment of the present invention. As shown in fig. 19, the solid line is a transmittance curve of the third etalon, and the dotted line is a reflectance curve of the third etalon. The standard transmission wavelength λ T is aligned with the position where the third etalon transmittance curve falls, when the slope of the transmittance curve is negative. The emitted light passes through a 50/50 power beam splitter, 50% of the transmitted light is emitted, 50% of the reflected light passes through a 50/50 power beam splitter, 50% of the light is directly received by PD2, the power is P2, 50% of the light is received by PD1 after being filtered by third etalon, and the power is P1. The PD1 and PD2 pass the optical power electrical signal to a calculation and control module that controls the laser to adjust the emitted optical wavelength.

When the emitted light is at the nominal wavelength, the calculation and control module calculates the Ratio _ Ref = P1/P2 of the two powers, which is a reference value. If the wavelength of the emitted light drifts to a short wavelength, if the drift is λ' T, the third etalon increases the transmission of the emitted light at the third etalon, reduces the reflection, increases the corresponding two powers, P1, and P2, so that the power Ratio calculated by the control and calculation module increases, and at this time, the control and calculation module controls the TEC to decrease the temperature of the laser, so that the power Ratio returns to Ratio _ Ref, and the wavelength of the emitted light returns to λ T.

If the wavelength of the emitted light drifts to the long wavelength, if the drift is lambda' T, the third etalon reduces the transmission of the emitted light at the third etalon, increases the reflection, and reduces the power Ratio obtained by the control and calculation module corresponding to the reduction of the two powers P1 and the invariance of the two powers P2, the control and calculation module controls the TEC to increase the temperature of the laser, so that the Ratio returns to Ratio _ Ref, and the wavelength of the emitted light returns to lambda T.

Scene 2

FIG. 19 is a wavelength diagram illustrating a negative slope lock, in accordance with embodiments of the present invention. As shown in fig. 19, the solid line is a transmittance curve of the third etalon, and the dotted line is a reflectance curve of the third etalon. The standard transmission wavelength λ T is aligned with the position where the third etalon transmittance curve falls, when the slope of the transmittance curve is negative. The emitted light passes through a 50/50 power beam splitter, 50% of the transmitted light is emitted, 50% of the reflected light passes through a 50/50 power beam splitter, 50% of the light is directly received by PD2, the power is P2, 50% of the light is received by PD1 after being filtered by third etalon, and the power is P1. The PD1 and PD2 pass the optical power electrical signal to a calculation and control module that controls the laser to adjust the emitted optical wavelength.

When the emitted light is at the nominal wavelength, the calculation and control module calculates the Ratio _ Ref = P1/P2 of the two powers, this being the reference value. If the wavelength of the emitted light drifts to a short wavelength, if the drift is λ' T, the third etalon increases the transmission of the emitted light at the third etalon, the reflection decreases, the corresponding two powers P1 increase, and P2 does not change, so that the power Ratio calculated by the control and calculation module increases, at this time, the control and calculation module controls the TEC to decrease the temperature of the laser, so that the power Ratio returns to Ratio _ Ref, and the wavelength of the emitted light returns to λ T.

If the wavelength of the emitted light drifts to the long wavelength, if the drift is λ "T, the third etalon reduces the transmission of the emitted light at the third etalon, increases the reflection, and decreases the corresponding two powers P1 and P2, the power Ratio calculated by the control and calculation module decreases, the control and calculation module controls the TEC to increase the temperature of the laser, so that the Ratio returns to Ratio _ Ref, and the wavelength of the emitted light returns to λ T.

Scene 3

FIG. 20 is a schematic wavelength diagram of extremum locking according to an embodiment of the invention. As shown in the schematic view of figure 20,

the solid line is the transmittance curve of the third etalon, and the dashed line is the reflectance curve of the third etalon. The standard transmission wavelength λ T is aligned with the position where the third etalon transmittance curve falls, when the slope of the transmittance curve is negative. The emitted light passes through a 50/50 power beam splitter, 50% of reflected light is emitted, 50% of transmitted light passes through a 50/50 power beam splitter, 50% of light is directly received by PD2, the power is P2, 50% of light is received by PD1 after being filtered by third etalon, and the power is P1. The PD1 and PD2 pass the optical power electrical signal to a calculation and control module that controls the laser to adjust the emitted optical wavelength.

When the emitted light is at the nominal wavelength, the calculation and control module calculates the Ratio _ Ref = P1/P2 of the two powers, which is a reference value. If the wavelength of the emitted light drifts to a short wavelength, if the drift is λ' T, the third etalon reduces the transmission of the emitted light at the third etalon, increases the reflection, and reduces the corresponding two powers P1 and P2, so that the power ratio calculated by the control and calculation module is reduced.

If the wavelength of the emitted light drifts to the long wavelength, if the drift is λ "T, the third etalon makes the emitted light transmit or decrease, reflect or increase, corresponding to the decrease of the two powers P1 and the no change of P2, the power ratio calculated by the control and calculation module decreases, and the drift of the two wavelengths both decreases corresponding to the power ratio, so the control and calculation module needs to control the TEC, adjust the temperature of the laser, try different temperature adjustment directions, measure the power ratio in real time, find the minimum value of the power ratio, which is the standard emission wavelength.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 3

In this embodiment, a management apparatus for signal light is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 21 is a block diagram of a structure of a device for managing signal light according to an embodiment of the present invention, and as shown in fig. 21, the device includes:

a first receiving module 2102, configured to receive the first detection result sent by the PD1, and determine a power P1 corresponding to the fourth split light;

a second receiving module 2104, configured to receive the first detection result sent by the PD2, and determine a power P2 corresponding to the filtered fifth split light;

a comparison module 2106, configured to compare the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of Etalon;

an indicating module 2108, configured to send, to the Tx according to the comparison result, indication information for adjusting the laser temperature corresponding to the Tx.

Example 7

Fig. 22 is a structural diagram of a passive optical network system PON according to an embodiment of the present invention, and as shown in fig. 22, the optical network device described in this embodiment includes an OLT or an ONU. In the case of an OLT, multiple optical transceiver modules are located in the same OLT, and the incoming signals are provided by the OLT. And if the optical network units are the ONUs, each optical transceiver component is connected with the corresponding ONU, and signals are input from the ONU. The two are connected via an optical fiber by WDM.

Fig. 23 is a schematic diagram of uplink and downlink wavelengths located in transmission windows of AWGs, where, as shown in fig. 23, the uplink and downlink wavelengths of each port of the AWG are within the same transmission window of the same FSR period of the AWG, where it is assumed that the uplink and downlink wavelength interval is Δ f/2, which is very close, and it is difficult for a general multiplexer/demultiplexer to separate them, and it can be well separated by using the optical module in the third embodiment. The interval between the upstream channel and the downstream channel corresponding to each port of the AWG is Δ f, i.e., the channel interval is Δ f. Thus, the total occupied frequency band resource is n Δ f, which is half less than that of fig. 2.

Example 8

Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:

s1, receiving the first detection result sent by the PD1, and determining the power P1 corresponding to the fourth beam of light;

s2, receiving the first detection result sent by the PD2, and determining power P2 corresponding to the fifth beam of light after filtering;

s3, comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of Etalon;

and S4, according to the comparison result, sending indication information for adjusting the temperature of the laser corresponding to the Tx.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.

Specifically, the processor may be the processor described in fig. 11 or 20.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical transceiver module for interfacing with an optical network device, comprising: transmitting means Tx, receiving means Rx, characterized in that said optical transceiving module further comprises:

a first splitter, respectively connected to the optical network device, the Tx and the Rx, and configured to split a signal light from the Tx and the optical network device, where the first splitter is a 50/50 power beam splitter;

the first optical Etalon is positioned between the first beam splitter and the Rx and is used for performing full transmission on first split light split by the first beam splitter of signal light from the optical network equipment and outputting the first split light to the Rx;

and the processor is respectively connected with the Tx, the first optical detector PD1 and the second optical detector PD2 and is used for adjusting the temperature of the Tx according to a first detection result and a second detection result, wherein the first detection result is a result generated by the PD1 detecting a fourth beam split by the second beam splitter, the second detection result is a result generated by the PD2 acquiring a fifth beam split by the second beam splitter, and the second beam splitter is connected with the first beam splitter and is used for splitting a third beam split by the signal light from the Tx through the first beam splitter.

2. The optical transceiver module of claim 1, further comprising:

an isolator located between the Tx and the first splitter,

and the second beam splitter is used for isolating the second beam splitter after the signal light from the optical network equipment passes through the first beam splitter.

3. The optical transceiver module of claim 2, further comprising:

the second Etalon is positioned between the isolator and the first beam splitter and is used for transmitting all signal light which meets a preset wavelength energy threshold value in the signal light emitted by the Tx and transmitting the signal light to the first beam splitter; and totally reflecting the signal light which does not meet the preset wavelength energy threshold value in the signal light transmitted by the Tx, and transmitting the signal light to the isolator for isolation.

4. The optical transceiver module of claim 1, further comprising:

third Etalon, with the second beam splitter is connected for to the process the fifth beam splitting light that the second beam splitter divides the beam carries out the filtering, wherein, the filtering mode includes: performing transmission treatment and/or reflection treatment on the fifth beam light;

and the second light detector PD2 is connected with the third Etalon and is used for acquiring the filtered fifth beam light and generating a second detection result.

5. The optical transceiver module as claimed in any one of claims 1-4, wherein Etalon is two parallel plates with transmission and/or transmission capability for incoming optical signals.

6. A method for managing signal light, applied to the optical transceiver module of claim 4, the method comprising:

receiving the first detection result sent by the PD1, and determining the power P1 corresponding to the fourth beam splitting light;

receiving the first detection result sent by the PD2, and determining power P2 corresponding to the fifth beam of light after filtering;

comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of the third Etalon;

and according to the comparison result, sending indication information for adjusting the laser temperature corresponding to the Tx.

7. The method of claim 6, wherein prior to comparing the attributed power ratio value to the reference ratio value, the method further comprises:

acquiring a transmittance curve and a standard transmission wavelength of the third Etalon;

and calculating the slope of the standard transmission wavelength on the transmittance curve.

8. The method according to claim 7, wherein when the slope is not 0, sending indication information for adjusting the laser temperature to the Tx according to the comparison result comprises:

transmitting first indication information for increasing the laser temperature to the Tx when the power ratio is less than the reference ratio;

transmitting second indication information for reducing the laser temperature to the Tx when the power ratio is greater than the reference ratio.

9. The method of claim 7, wherein when the slope is equal to 0, the method further comprises:

acquiring temperature information corresponding to a plurality of specified temperatures sent by Tx;

calculating the power ratio according to the temperature information corresponding to the specified temperature;

comparing power ratios corresponding to the designated temperatures, and determining a target temperature with the minimum power ratio;

sending third indication information for adjusting the laser temperature to the target temperature to the Tx.

10. A signal light management device applied to the optical transceiver module of claim 4, the device comprising:

a first receiving module, configured to receive the first detection result sent by the PD1, and determine a power P1 corresponding to the fourth split beam;

a second receiving module, configured to receive the first detection result sent by the PD2, and determine a power P2 corresponding to the filtered fifth split light;

the comparison module is used for comparing the power ratio of P1/P2 with a reference ratio corresponding to the standard transmission wavelength of the third Etalon;

and the indicating module is used for sending indicating information for adjusting the temperature of the laser corresponding to the Tx according to the comparison result.

11. A passive optical network system, PON, comprising: an optical line terminal OLT, an optical network unit ONU and a wavelength division multiplexer WDM, wherein said OLT is connected to said WDM by an optical transceiver module according to any of claims 1-5.

12. A passive optical network system, PON, comprising: an optical line terminal OLT, an optical network unit ONU and a wavelength division multiplexer WDM, wherein said ONU is connected to said WDM by an optical transceiver module according to any of claims 1-5.

13. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 6-9 when executed.

14. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 6-9.