CN111624714B - Optical path structure and optical devices - Google Patents
Optical path structure and optical devices Download PDFInfo
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- CN111624714B CN111624714B CN202010617193.0A CN202010617193A CN111624714B CN 111624714 B CN111624714 B CN 111624714B CN 202010617193 A CN202010617193 A CN 202010617193A CN 111624714 B CN111624714 B CN 111624714B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 369
- 239000013307 optical fiber Substances 0.000 claims description 26
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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Abstract
The invention discloses an optical path structure and an optical device, wherein the optical path structure comprises a first optical signal component, a first optical path component and a second optical path component, the first optical signal component is used for emitting and receiving parallel light with multiple wavelengths, the first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on an optical outlet path of the first optical signal component and used for receiving light with the first wavelength reflected by the first optical filter, the second optical path component comprises a second optical filter and a second optical reception device, the second optical filter is obliquely arranged on the optical outlet path of the first optical signal component and is positioned on one side of the second optical filter, which is opposite to the first optical signal component, and the second optical reception device is used for receiving light with the second wavelength, which is transmitted through the first optical filter and reflected by the second optical filter. The optical path structure provided by the invention can reduce the number of optical devices of the wavelength division optical path in the optical device, and is beneficial to reducing the volume of the optical device.
Description
Technical Field
The invention relates to the technical field of photoelectric communication, in particular to an optical path structure and an optical device.
Background
With the development of optical communication technology, the broadband requirement of the client for the access network is higher, and the broadband passive optical integrated access standard GPON network cannot well meet the market requirement, so that GPON networks with other transmission rates, such as 10G GPON networks, are often introduced.
When the GPON of various specifications is deployed through the optical device, in order to realize independent transmission and reception of GPON optical signals of different specifications, an independent propagation optical path is often required to be set for the GPON optical signals of each specification, so that the optical device needs to set a plurality of optical path components according to the architecture of each propagation optical path, which leads to the increase of the volume of the optical device and is unfavorable for the weight reduction and miniaturization of the optical device.
Disclosure of Invention
The invention mainly aims to provide an optical path structure and an optical device, and aims to reduce the number of optical path elements of the wavelength division optical path structure and the volume of the optical device.
In order to achieve the above object, the present invention proposes an optical path structure applied to an optical device, the optical path structure comprising:
the first optical signal component is used for emitting and receiving parallel light with multiple wavelengths;
The first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on an emergent light path of the first optical signal component, and the first optical receiving device is used for receiving light with a first wavelength reflected by the first optical filter;
The second light path component comprises a second optical filter and a second light receiving device, wherein the second optical filter is obliquely arranged on the light emitting path of the first light signal component and is positioned at one side of the second optical filter, which is opposite to the first light signal component, and the second light receiving device is used for receiving light with a second wavelength, which passes through the first optical filter and is reflected by the second optical filter.
In an embodiment of the present invention, the optical path structure further includes a total reflection lens;
the total reflection lens and the first light receiving device are arranged between the first optical filter and the first optical signal component and are respectively positioned at two sides of a light-emitting light path of the first optical signal component; the total reflection lens is used for reflecting the light with the first wavelength reflected by the first optical filter to the first light receiving device.
In an embodiment of the present invention, an included angle between a plane where the first optical filter is located and an outgoing light path of the first optical signal component is defined as α, and an included angle between a plane where the total reflection lens is located and an outgoing light path of the first optical signal component is defined as β, where α <90 ° is greater than or equal to 70 ° and β <90 °;
and/or, defining an included angle between the plane where the second optical filter is located and the light-emitting light path of the first optical signal component as gamma, wherein gamma=45°.
In an embodiment of the invention, the first filter and the second filter are high-pass filters;
and/or the first wavelength is smaller than the second wavelength.
In an embodiment of the present invention, the first optical path assembly further includes a third optical filter disposed adjacent to the first light receiving device and located on an optical path between the total reflection lens and the first light receiving device, the third optical filter being for passing the light of the first wavelength.
In an embodiment of the present invention, the second optical path assembly further includes a fourth optical filter disposed adjacent to the second light receiving device and located on an optical path between the second light receiving device and the second optical filter, and the fourth optical filter is configured to pass the light of the second wavelength.
In one embodiment of the invention, the first optical signal assembly includes a fiber optic adapter and a first lens;
the optical fiber adapter and the first lens are coaxially arranged, the first lens is located between the optical fiber adapter and the first optical filter, and the first lens is used for enabling light emitted by the optical fiber adapter to be parallel to enter the first optical filter.
In an embodiment of the present invention, the optical path structure further includes a second optical signal component, where the second optical signal component includes a first light emitting device, a fifth optical filter, and a second lens;
the second lens, the fifth optical filter and the first light emitting device are sequentially arranged on an extension light path of the light-emitting light path of the first light signal component at intervals;
Light with a third wavelength emitted by the first light emitting device sequentially passes through the fifth optical filter, the second lens, the second optical filter and the first optical filter and then enters the first optical signal assembly.
In an embodiment of the invention, the second optical signal assembly further includes a second light emitting device;
The second light emitting device is arranged adjacent to the fifth optical filter and is positioned at one side of a light-emitting light path of the first light emitting device, and light with a fourth wavelength emitted by the second light emitting device is reflected by the fifth optical filter, sequentially penetrates through the second lens, the second optical filter and the first optical filter and enters the first optical signal assembly;
the third wavelength is greater than the fourth wavelength, which is greater than the second wavelength.
In addition, the invention also provides an optical device, which comprises:
The above-mentioned light path structure;
the light path structure is arranged on the tube shell and is partially positioned in the mounting cavity.
The optical path structure of the technical scheme is provided with a first optical signal component, a first optical path component and a second optical path component, wherein the first optical signal component is used for emitting and receiving parallel light with multiple wavelengths, the first optical path component comprises a first optical filter and a first optical connection device, the first optical filter is obliquely arranged on an optical emergent path of the first optical signal component and used for receiving light with the first wavelength reflected by the first optical filter, the second optical path component comprises a second optical filter and a second optical reception device, the second optical filter is obliquely arranged on an optical emergent path of the first optical signal component and is positioned on one side of the second optical filter, which is opposite to the first optical signal component, and the second optical reception device is used for receiving light with the second wavelength, which is transmitted through the first optical filter and reflected by the second optical filter. Therefore, the first optical filter can filter and reflect the light with the first wavelength emitted by the first optical signal component to the first light receiving device, and enable the light with the second wavelength emitted by the first optical signal component to be transmitted to the second optical filter, and the second optical filter reflects the light with the second wavelength to the second light receiving device for receiving. After light with a first wavelength and light with a second wavelength emitted by a first optical signal component in the optical path structure are separated on a first optical filter, the light enters different light receiving devices respectively, wavelength division processing of composite light with two different wavelengths is achieved, a plurality of independent optical path structures are not required to be arranged for achieving wavelength division of the composite light, the number of corresponding optical path components is reduced, and the size of the optical path structure is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a portion of an optical device of the present invention;
FIG. 2 is a schematic view of the optical path structure of the present invention;
Fig. 3 is a schematic view of a part of the optical path structure in fig. 2.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 1 | First optical signal assembly | 32 | Second light receiving device |
| 11 | Optical fiber adapter | 33 | Fourth optical filter |
| 12 | First lens | 4 | Second optical signal assembly |
| 2 | First light path component | 41 | First light emitting device |
| 21 | First optical filter | 42 | Fifth optical filter |
| 22 | Total reflection lens | 43 | Second lens |
| 23 | First light receiving device | 44 | Second light emitting device |
| 24 | Third optical filter | 5 | Shell tube |
| 3 | Second light path component | 51 | Mounting cavity |
| 31 | Second optical filter |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. The term "and/or" as used throughout this document is meant to include three side-by-side schemes, for example, "A and/or B", including A scheme, or B scheme, or a scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides an optical path structure which is applied to an optical device.
In the embodiment of the invention, as shown in fig. 1, the optical path structure comprises a first optical signal component 1, a first optical path component 2 and a second optical path component 3, wherein the first optical signal component 1 is used for emitting and receiving parallel light with multiple wavelengths, the first optical path component 2 comprises a first optical filter 21 and a first optical connection device, the first optical filter 21 is obliquely arranged on an optical outlet path of the first optical signal component 1, the first optical reception device 23 is used for receiving light with the first wavelength reflected by the first optical filter, the second optical path component 3 comprises a second optical filter 31 and a second optical reception device 32, the second optical filter 31 is obliquely arranged on an optical outlet path of the first optical signal component 1 and is positioned on one side of the second optical filter 31, which is opposite to the first optical signal component 1, and the second optical reception device 32 is used for receiving light with the second wavelength which is transmitted through the first optical filter 21 and reflected by the second optical filter 31.
In this embodiment, the first optical signal component 1 is configured to emit a parallel light beam, which may be an optical signal propagating through an optical fiber and focused and collimated, and may include optical signals with a plurality of different wavelengths.
The first optical path component 2 is used for separating the first light signal component 1 to emit light with a first wavelength of the multi-wavelength light. Specifically, the first optical path component 2 includes a first optical filter 21 and a first light receiving device 23, where the first optical filter 21 is configured to reflect light of a first wavelength and light of a second wavelength, and the first optical filter 21 may be a high-pass filter, that is, may pass light of a specific wavelength and cut off light of a specific wavelength, for example, the first optical filter 21 may be configured to pass light of a wavelength greater than 1270nm and cut off and reflect light of a wavelength less than 1270 nm. The first light receiving device 23 may be an optical receiver, and the first light receiving device 23 is configured to receive the first wavelength optical signal.
The second optical path component 3 is used for being matched with the first optical path component 2 to separate the first optical signal component 1 to emit light with a second wavelength in the multi-wavelength light. Specifically, the second optical path component 3 includes a second optical filter 31 and a second light receiving device 32, where the second optical filter 31 may be a high-pass filter, and the second optical filter 31 may pass light above a certain wavelength and cut off light below the certain wavelength, for example, the second optical filter 31 may pass light with a wavelength greater than 1310nm and cut off and reflect light with a wavelength below 1310 nm. The second light receiving device 32 is an optical receiver, and the second light receiving device 32 is configured to receive an optical signal of a second wavelength, so as to perform separation processing and use on light of the first wavelength and the second wavelength in cooperation with the first light receiving device 23.
The first filter 21 in this embodiment can filter and reflect the light with the first wavelength emitted by the first optical signal assembly 1 to the first light receiving device 23, and transmit the light with the second wavelength emitted by the first optical signal assembly 1 to the second filter 31, and the second filter 31 reflects the light with the second wavelength to the second light receiving device 32 for receiving. After the light with the first wavelength and the light with the second wavelength emitted by the first optical signal component 1 in the optical path structure are separated on the first optical filter 21, the light enters different light receiving devices respectively, so that the wavelength division processing of the composite light with two different wavelengths is realized, a plurality of independent optical path structures are not required to be arranged for realizing the wavelength division of the composite light, the number of corresponding optical path components is reduced, and the volume of the optical path structure is reduced.
In an embodiment of the present invention, as shown in fig. 1, the optical path structure further includes a total reflection lens 22, the total reflection lens 22 and the first light receiving device 23 are disposed between the first optical filter 21 and the first optical signal assembly 1 and are respectively located at two sides of the light path of the first optical signal assembly 1, and the total reflection lens 22 is used for reflecting the light with the first wavelength reflected by the first optical filter 21 to the first light receiving device 23.
In the present embodiment, the total reflection mirror 22 is configured to reflect the light beam reflected from the first filter 21 and totally reflect the light beam into the first light receiving device 23 for receiving. Thus, the light of the first wavelength filtered and reflected by the first filter 21 can enter the first light receiving device 23 as much as possible for recycling, thereby improving the light utilization rate. Meanwhile, the arrangement of the total reflection lens 22 enables the light path between the first optical filter 21 and the first light receiving device 23 to be folded and compressed, shortens the light path from the first optical filter 21 to the first light receiving device 23, and is beneficial to reducing the volume of the light path structure and the volume of an optical device.
In an embodiment of the present invention, as shown in fig. 1, an included angle between a plane of the first optical filter 21 and an outgoing light path of the first optical signal component 1 is defined as α, an included angle between a plane of the total reflection lens 22 and an outgoing light path of the first optical signal component 1 is defined as β,70 ° +.alpha <90 °,25 ° +.beta <90 °, and/or an included angle between a plane of the second optical filter 31 and an outgoing light path of the first optical signal component 1 is defined as γ, γ=45°.
In this embodiment, when the included angle α between the plane where the first optical filter 21 is located and the light-emitting path of the first optical signal component 1 is greater than or equal to 70 degrees and less than or equal to 90 degrees, the included angle between the plane where the first optical filter 21 is located and the vertical direction is smaller, at this time, the inclination of the first optical filter 21 relative to the vertical direction is lower, the light transition band when the first optical filter 21 is coated is smaller, and the requirements on the coating process of the first optical filter 21 are lower, so that the coating of the first optical filter 21 is easier, and the separation degree of the first optical filter 21 on the light of the first wavelength and the light of the second wavelength is better, which is favorable for improving the separation effect of the first optical filter 21 on the light of the first wavelength and the light of the second wavelength.
When the included angle β between the plane where the total reflection lens 22 is located and the light-emitting path of the first optical signal assembly 1 is greater than or equal to 25 degrees and less than or equal to 90 degrees, the total reflection lens 22 can cooperate with the first optical filter 21 to reflect the light with the first wavelength into the first light receiving device 23 for receiving. Preferably, the sum of the included angle α and the included angle β is 95 degrees, and at this time, the first optical filter 21 can reflect the light of the first wavelength out along the direction perpendicular to the light-emitting path of the first optical signal assembly 1, so that the light of the first wavelength can vertically enter the first optical receiving device 23, and the light of the first wavelength can be conveniently propagated at a high speed in the first optical receiving device 23.
When the included angle γ between the plane where the second optical filter 31 is located and the light-emitting path of the first optical signal assembly 1 is equal to 45 degrees, the second optical filter 31 can reflect the light with the second wavelength out along the direction perpendicular to the light-emitting path of the first optical signal assembly 1, and at this time, the light with the second wavelength can be vertically incident into the second optical receiving device 32, so that the light with the second wavelength can be conveniently propagated in the second optical receiving device 32 at a high speed.
In an embodiment of the present invention, the first filter 21 and the second filter 31 are high-pass filters, and/or the first wavelength is smaller than the second wavelength.
In the present embodiment, when the first filter 21 and the second filter 31 are high-pass filters, and the cut-off wavelength of the first filter 21 and the cut-off wavelength of the second filter 31 are different, the cut-off wavelength of the first filter 21 is a first wavelength, and the cut-off wavelength of the second filter 31 is a second wavelength. The wavelength of the light of the first wavelength filtered by the first filter 21 is smaller than the wavelength of the light of the second wavelength filtered by the second filter 31, so that the light of the first wavelength in the first optical signal assembly 1 is cut off and reflected when passing through the first filter 21, and the light of the second wavelength in the first optical signal assembly 1 can be incident to the second filter 31 through the first filter 21 and is cut off and reflected when passing through the second filter 31.
Alternatively, the first wavelength may be 1260nm or more and 1280nm or less, the second wavelength may be 1300nm or more and 1320nm or less, the cut-off wavelength of the first filter 21 may be 1280nm, and the cut-off wavelength of the second filter 31 may be 1320nm.
In an embodiment of the present invention, as shown in fig. 1, the second light path assembly 3 further includes a fourth filter 33, the fourth filter 33 is disposed adjacent to the second light receiving device 32 and is located on the light path between the total reflection lens 22 and the first light receiving device 23, and the fourth filter 33 is used for passing the light of the second wavelength.
In the present embodiment, the third filter 24 is a bandpass filter, and the third filter 24 is used for passing the light with the first wavelength and cutting off the light with the other wavelength, because the light with the first wavelength is less than or equal to the first wavelength reflected by the first filter 21, the light with the first wavelength and the light with the wavelength less than the first wavelength are mixed in the light reflected by the first filter 21 to the total reflection lens 22, and the light reflected by the total reflection lens 22 to the first light receiving device 23 also contains the light with the first wavelength and the light with the wavelength less than the first wavelength, which results in the light received by the first receiving component being the composite light with multiple wavelengths, the light signal is not pure enough, and the use of the light signal with the first wavelength is affected. Therefore, the third filter 24 is configured to further filter the light reflected by the total reflection mirror to the first light receiving device 23, so that only the light with the first wavelength enters the first light receiving device 23, thereby realizing purer separation of the light with the first wavelength and facilitating subsequent use of the light with the first wavelength.
In an embodiment of the present invention, as shown in fig. 1, the first optical path component 2 further includes a third optical filter 24, where the third optical filter 24 is disposed adjacent to the first light receiving device 23 and between the first light receiving device 23 and the total reflection lens 22, and the third optical filter 24 is used for passing light of the first wavelength.
In the present embodiment, the third filter 24 is a bandpass filter, and the third filter 24 is used for passing the light with the first wavelength and cutting off the light with the other wavelength, because the light with the first wavelength is less than or equal to the first wavelength reflected by the first filter 21, the light with the first wavelength and the light with the wavelength less than the first wavelength are mixed in the light reflected by the first filter 21 to the total reflection lens 22, and the light reflected by the total reflection lens 22 to the first light receiving device 23 also contains the light with the first wavelength and the light with the wavelength less than the first wavelength, which results in the light received by the first receiving component being the composite light with multiple wavelengths, the light signal is not pure enough, and the use of the light signal with the first wavelength is affected. Therefore, the third filter 24 is configured to further filter the light reflected by the total reflection mirror to the first light receiving device 23, so that only the light with the first wavelength enters the first light receiving device 23, thereby realizing purer separation of the light with the first wavelength and facilitating subsequent use of the light with the first wavelength.
In one embodiment of the present invention, as shown in fig. 1, the first optical signal assembly 1 includes an optical fiber adapter 11 and a first lens 12, where the optical fiber adapter 11 is coaxially disposed with the first lens 12, the first lens 12 is located on an optical path between the optical fiber adapter 11 and the first optical filter 21, and the first lens 12 is used to make light emitted from the optical fiber adapter 11 enter the first optical filter 21 in parallel.
In the present embodiment, the optical fiber adapter 11 is connected to an optical fiber for receiving and transmitting an optical signal into the optical fiber and transmitting the optical signal in the optical fiber to the first filter 21. The first lens 12 is used for converging and collimating the light beam emitted from the optical fiber adapter 11, so that the light beam becomes collimated parallel light, and the collimated parallel light is incident into the first optical filter 21, so that the light reflected by the first optical filter 21 or transmitted through the first optical filter 21 is also parallel light, and the light path is easy to control and is not easy to diverge and deflect, which is also beneficial to improving the light utilization rate.
In an embodiment of the present invention, as shown in fig. 1 and 2, the optical path structure further includes a second optical signal assembly 4, where the second optical signal assembly 4 includes a first optical emission device 41, a fifth optical filter 42, and a second lens 43, the fifth optical filter 42, and the first optical emission device 41 are sequentially disposed on an extended optical path of the light-emitting optical path of the first optical signal assembly 1 at intervals, and the light with the third wavelength emitted by the first optical emission device 41 sequentially passes through the fifth optical filter 42, the second lens 43, the second optical filter 31, and the first optical filter 21 and then enters the first optical signal assembly 1.
In this embodiment, the second optical signal component 4 is configured to emit an optical signal to the first optical signal component 1, the first light emitting device 41 in the second optical signal component 4 may be a light emitter, the first light emitting device 41 is configured to emit an optical signal, and the fifth optical filter 42 in the second optical signal component 4 may be a high-pass filter that may pass light with a wavelength higher than a specific wavelength and cut off light with a wavelength lower than the specific wavelength, for example, the fifth optical filter 42 may pass light with a wavelength higher than 1490nm and cut off and reflect light with a wavelength lower than 1490 nm. The second lens 43 is used for converging and collimating the light beams, and the second lens 43 may be disposed at 45 degrees to the vertical direction. The cut-off wavelength of the fifth optical filter 42 is greater than the cut-off wavelength of the second lens 43, the cut-off wavelength of the second lens 43 is greater than the cut-off wavelength of the second lens 43, and the third wavelength is greater than the second wavelength, so that the light with the third wavelength emitted by the first light emitting device 41 can sequentially pass through the fifth optical filter 42, the second optical filter 31, and the first optical filter 21 to enter the optical fiber adapter 11 for receiving.
In an embodiment of the present invention, as shown in fig. 2 and 3, the second optical signal assembly 4 further includes a second optical emitting device 44, where the second optical emitting device 44 is disposed adjacent to the fifth optical filter 42 and is located at a side of the light path of the light emitted by the first optical emitting device 41, and after being reflected by the fifth optical filter 42, the light with the fourth wavelength emitted by the second optical emitting device 44 sequentially passes through the second lens 43, the second optical filter 31 and the first optical filter 21 and enters the first optical signal assembly 1, and the third wavelength is greater than the fourth wavelength, and the fourth wavelength is greater than the second wavelength.
In this embodiment, the second lens 43 may be disposed at an angle of 45 ° with respect to the vertical direction, and the second light emitting device 44 may be disposed above the second lens 43, and the second light emitting device 44 may be a light emitter, and the second light emitting device 44 is configured to emit a light signal to the optical fiber adapter 11. The cut-off wavelength of the fifth optical filter 42 is a third wavelength, the third wavelength is larger than the fourth wavelength, the fourth wavelength is larger than the second wavelength, and the second wavelength is larger than the first wavelength, so that the light with the fourth wavelength emitted by the second light emitting device 44 is reflected by the fifth optical filter 42 and enters the optical fiber adaptation through the second optical filter 31 and the first optical filter 21, and the light with the third wavelength emitted by the first light emitting device 41 can pass through the fifth optical filter 42 and then enter the optical fiber adapter 11 through the second optical filter 31 and the first optical filter 21, and is combined with the light with the third wavelength, so that the composite utilization of the light with the two wavelengths is realized. Wherein the first wavelength may be greater than or equal to 1260nm and less than or equal to 1280nm, the second wavelength may be greater than or equal to 1300nm and less than or equal to 1320nm, the fourth wavelength may be greater than or equal to 1480nm and less than or equal to 1500nm, and the third wavelength may be greater than or equal to 1574nm and less than or equal to 1580nm.
It should be noted that, the optical fiber adapter 11 may send and receive optical signals simultaneously, that is, the optical fiber adapter 11 sends optical signals to the first lens 12 and then to the first optical filter 21, and the first light emitting device 41 and the second light emitting device 44 may also send optical signals to the fifth optical filter 42, where the third wavelength is greater than the fourth wavelength, and the fourth wavelength is greater than the second wavelength, and the second wavelength is greater than the first wavelength, and the light of the third wavelength sent by the first light emitting device 41 and the light of the fourth wavelength sent by the second light emitting device 44 directly enter the optical fiber adapter 11 through the second optical filter 31 and the first optical filter 21, and the light of the first wavelength sent by the optical fiber adapter 11 is cut off and reflected at the first optical filter, and the light of the second wavelength is cut off and reflected at the second optical filter 31, so that the light of the second wavelength does not continue to propagate forward, and thus the light of the first wavelength to the fourth wavelength propagates without interfering with each other, so as to implement the wavelength division multiplexing function of the optical path structure.
The invention also provides an optical device, which comprises the optical path structure and the tube shell 5 in the embodiment, wherein the tube shell 5 is provided with a mounting cavity 51, and the optical path structure is arranged in the tube shell 5 and is partially positioned in the mounting cavity 51.
In the present embodiment, the first light receiving device 23, the second light receiving device 32, the first light emitting device 41, and the second light emitting device 44 may be provided in the housing and partially located in the installation cavity 51. The first filter 21, the total reflection lens 22, the second filter 31, the third filter 24, the fourth filter 33, the fifth filter 42 and the second lens 43 are disposed in the mounting cavity 51, and can be fixedly connected to the package 5 by means of fastening, bonding, or the like. The tube shell 5 is used for installing and fixing the optical path structure, so that the relative positions of the optical devices in the optical path structure are stable, and the light can be accurately and reliably transmitted in the optical path structure.
The specific structure of the optical path structure refers to the above embodiments, and since the optical device adopts all the technical solutions of all the embodiments, at least the optical device has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (7)
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| CN109254355A (en) * | 2018-10-15 | 2019-01-22 | 深圳市亚派光电器件有限公司 | Light receiving element |
| CN110806623A (en) * | 2019-11-15 | 2020-02-18 | 深圳市亚派光电器件有限公司 | Optical transceiver |
| CN111007602A (en) * | 2019-12-24 | 2020-04-14 | 深圳市亚派光电器件有限公司 | Optical transceiver |
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| CN213182126U (en) * | 2020-06-30 | 2021-05-11 | 深圳市亚派光电器件有限公司 | Optical path structure and optical device |
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