CN104238595B - The optical performance monitor of fiber waveguide is controlled based on temperature - Google Patents
The optical performance monitor of fiber waveguide is controlled based on temperature Download PDFInfo
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- CN104238595B CN104238595B CN201310234963.3A CN201310234963A CN104238595B CN 104238595 B CN104238595 B CN 104238595B CN 201310234963 A CN201310234963 A CN 201310234963A CN 104238595 B CN104238595 B CN 104238595B
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Abstract
The invention discloses a kind of optical performance monitor controlling fiber waveguide based on temperature, comprise shell, temperature control system, fiber array, array waveguide grid chip, photodetector array and circuit board, fiber array, array waveguide grid chip and photodetector array are fixing after being coupled and aligned, temperature control system comprises heater and hygrosensor, array waveguide grid chip is installed on the heaters, and photodetector array, heater and hygrosensor electrically connect with circuit board.The present invention is changed by temperature control realization channel wavelength, obtains spectroscopic data point by scanning characteristic frequency passband continuously, uses Deconvolution Algorithm Based on Frequency signal waveform to be reduced, it is thus achieved that signal spectrum accurately.Product can realize the sweep length of 50GHz and 100GHz, and the wave length shift in the product life cycle can be carried out self calibration.The optical performance monitor structure relative compact of the present invention, integrated on sheet makes light loss be obviously reduced, and reliability also has clear improvement.
Description
Technical field
The present invention relates to optical communication field, particularly relate to a kind of optical performance monitor controlling fiber waveguide based on temperature.
Background technology
In order to improve the capacity of long-distance optical fiber communication, dense wavelength division multiplexing system is greatly developed, dense wavelength division
Multiplex technique realizes Large Copacity information by the least channel spacing and transmits.In dense wavelength division multiplexing system, light source ripple
Long temperature drift and the temperature sensitivity of dense wave division multiplexer all can cause the change of channel center wavelengths, and and then lead
Cause the change of the signal to noise ratio of each channel.It addition, the gain unevenness of image intensifer can cause the changed power of each channel.Cause
This, the parameter such as necessary centre wavelength, luminous power and signal to noise ratio to channel each in system monitors in real time.Especially exist
When channel separation reduces, the system merit such as identification that spectral performance is drifted about by the centre wavelength of monitoring and controlling channels, isolation of the system failure
The detection of energy has even more important meaning.Such as, wave length shift easilys lead to signal from a channel string to another one
Channel, need to detect wave length shift.It addition, normally work in order to ensure the image intensifer in communication system, it is also desirable to will
Wavelength parameter Real-time Feedback is in communication network element.
Optical communication system need technical grade optical performance monitors (Optical Performance Monitor,
OPM), and require low price, compact conformation, need, with traditional spectroanalysis instrument, there is identical power and wavelength essence
Degree, it is possible to monitor the signal in the optical communication channel of close interval with higher wavelength resolution and bigger dynamic range
Light.
Existing optical performance monitors has multiple design structure, substantially can be divided into optical property based on waveguide optical
Monitor and the big class of optical performance monitors based on space optics two.The former is in addition to planar optical waveguide and photo-detector, logical
Often also need to other optical control device.The integrated level of the latter is relatively low, and typically requires motor element, and reliability also compares
Low.
The optical performance monitors part that precision is higher at present all uses the form of Thin Film Filter or grating.Thin film is filtered
Sheet structure, need movement frame for movement with the use of, and by rotation Thin Film Filter select wavelength to be monitored.This
The shortcoming planting structure is in short wavelength's part, and owing to angle of incidence becomes big, thin film projection spectral line shape is deteriorated, and causes optical property to be supervised
The degradation of visual organ.For raster mode, needing to coordinate sensor array to work together, system complex, cost is high, to aging
Sensitivity and not easy care, therefore commercial product device is the most costly.
Summary of the invention
The present invention is in order to overcome above deficiency, it is proposed that a kind of optical power monitor controlling fiber waveguide based on temperature.
The technical problem of the present invention is solved by following technical scheme:
A kind of optical performance monitor controlling fiber waveguide based on temperature, comprises shell, temperature control system, fiber array, battle array
The input coupling of train wave Waveguide Grating chip, photodetector array and circuit board, described fiber array and array waveguide grid chip
Fixing after closing alignment, described photodetector array is fixing after being coupled and aligned with the outfan of array waveguide grid chip, described temperature
Ore-controlling Role comprises temperature controller and hygrosensor, and described array waveguide grid chip is arranged on described temperature controller,
The output electrode of described photodetector array, the electrode of temperature controller and hygrosensor electrically connect with circuit board, described electricity
Road plate reads temperature information and the photoelectric current of photodetector array of hygrosensor, and output temperature control signal is to temperature control
Device processed.Fig. 1 is the schematic diagram of the optical performance monitor controlling fiber waveguide based on temperature of the present invention.
In one embodiment of the invention, described temperature control system controls the variations in temperature of described array waveguide grid chip
Scope is 0.4nm/k, and wherein k is the temperature correlation coefficient of described array waveguide grid chip output wavelength.0.4nm corresponding to
ITU spectrum barrier (ITU Grid) 50G channel spacing.Typically, the temperature of ordinary silicon base array waveguide grid chip output wavelength
Degree correlation coefficient be 0.011nm/ DEG C, then range of temperature T of array waveguide grid chip=(0.4nm)/
(0.011nm/℃) = 36.4℃。
In one embodiment of the invention, described temperature controller is thermoelectric refrigerator.
In one embodiment of the invention, described temperature controller is resistance wire and flaky pottery.
In one embodiment of the invention, filled out by conduction oil between described flaky pottery and array waveguide grid chip
Filling, periphery flexible glue is adhesively fixed.
In one embodiment of the invention, described fiber array is coupled and aligned with the input of array waveguide grid chip
Being adhesively fixed by glue afterwards, the outfan of described photodetector array and array waveguide grid chip passes through glue after being coupled and aligned
Water is adhesively fixed.
In one embodiment of the invention, described hygrosensor is critesistor.
In one embodiment of the invention, described hygrosensor is resistance temperature detector.
In one embodiment of the invention, film filter and photo-detector, described film filter and light are also comprised
A passage outside detector and the service aisle of array waveguide grid chip is coupled and aligned and fixes.Fig. 2 is the present embodiment
The schematic diagram of optical performance monitor controlling fiber waveguide based on temperature.
In one embodiment of the invention, fixed wave length detector, described fixed wave length detector and array are also comprised
A passage outside the service aisle of waveguide grid chip is connected by optical fiber, and described fixed wave length detector comprises self-focusing
Lens and photo-detector, the end face that described GRIN Lens couples with photo-detector is coated with light filter film.Fig. 3 is the present embodiment
The schematic diagram of the optical performance monitor of fiber waveguide is controlled based on temperature.Fig. 4 is the schematic diagram of fixed wave length detector.
The present invention is by changing the control realization channel wavelength of temperature, by leading in scanning particular frequency range continuously
Band records spectrum, obtains spectroscopic data point according to this, and then uses Deconvolution Algorithm Based on Frequency to carry out follow-up signal processing, by signal waveform
Reduction, it is thus achieved that signal spectrum accurately.The present invention uses maturation process, is particularly suited for little channel spacing, such as 25GHz or
The scanning of person's 50GHz channel spacing.
According to the change of ordinary silicon based waveguides 0.011nm/ DEG C, then the variations in temperature of 36.4 DEG C can cause the wavelength of 0.4nm
Change, such excursion namely the channel width of 50GHz.It is to say, product can realize the sweep length of 50GHz.
For the transmission signal of ITU spectrum barrier (ITU Grid) the 50G channel spacing of a standard, the present invention can realize each logical
The detection of the most accurate luminous power in road, as it is shown in figure 5, the sweep length of 50G is by whole passage spectral line.
For the transmission signal of ITU spectrum barrier (ITU Grid) the 100GHz channel spacing of a standard, the present invention can
To realize the detection of each channel optical power, as shown in Figure 6, the sweep length of 50G will cover the half of passage spectral line.As conjunction
The approximation of reason, it is believed that passage spectral line is symmetrical, so can be obtained by the spectral line shape of whole passage.Accordingly, at circuit and
With the help of firmware, it is possible to achieve the peak value of each passage and the calculating of optical s/n ratio (OSNR).
The present invention based on array waveguide grating (PLC AWG) ripe, that produce in enormous quantities, structure relative compact, by
Other element in light path can be integrated on sheet so that light loss is obviously reduced.For occurring in the life cycle of product
Wave length shift, use stable film filter to calibrate on fixed wave length.The present invention controls fiber waveguide based on temperature
Optical performance monitor simple in construction, and inside do not has motor element, the reliability of product also has clear improvement.Cost is relative to mesh
Optical performance monitor on front market has obtained reducing significantly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the optical performance monitor controlling fiber waveguide based on temperature of embodiments of the invention one；
Fig. 2 is the schematic diagram of the optical performance monitor controlling fiber waveguide based on temperature of embodiments of the invention two；
Fig. 3 is the schematic diagram of the optical performance monitor controlling fiber waveguide based on temperature of embodiments of the invention three；
Fig. 4 is the schematic diagram of the fixed wave length detector used in embodiments of the invention three；
Fig. 5 is 50GHz sweep length schematic diagram；
Fig. 6 is 100GHz sweep length schematic diagram.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the present invention is described in further details.
Embodiment one:
As it is shown in figure 1, a kind of optical performance monitor controlling fiber waveguide based on temperature, comprise shell, temperature control system, light
Fibre array 103, array waveguide grid chip 101, photodetector array 102 and circuit board 105, fiber array 103 and array ripple
The input of Waveguide Grating chip 101 is fixing after being coupled and aligned, and photodetector array 102 is defeated with array waveguide grid chip 101
Going out after end is coupled and aligned fixing, temperature control system comprises heater 104 and hygrosensor 106, and array waveguide grid chip 101 is pacified
It is contained on heater 104, the output electrode of photodetector array 102, the electrode of heater 104 and hygrosensor 106 and electricity
Road plate 105 electrically connects, and circuit board 105 reads temperature information and the photoelectric current of photodetector array 102 of hygrosensor 106,
And output temperature control signal is to heater 104.
Range of temperature T=(0.4nm) of the temperature control system control array waveguide grid chip of the present embodiment/
(0.011nm/ DEG C)=36.4 DEG C, wherein 0.011nm/ DEG C is the temperature of ordinary silicon base array waveguide grid chip output wavelength
Correlation coefficient.
In the present embodiment, connect by flexible glue is fixing between shell and temperature control system, play the fixing and effect of buffering.
Temperature control system comprises resistance wire and flaky pottery, realizes heating function, flaky pottery and array waveguide grating core by resistance wire
Being filled by conduction oil between sheet 101, periphery flexible glue is adhesively fixed, and flaky pottery realizes heat sinking function.Fiber array 103 with
The input of array waveguide grid chip 101 is adhesively fixed by glue after being coupled and aligned, photodetector array 102 and array ripple
The outfan of Waveguide Grating chip 101 is adhesively fixed by glue after being coupled and aligned.The hygrosensor 106 of the present embodiment is temperature-sensitive
Resistance.
The work process of the present embodiment is as follows: one group of wavelength-division multiplex signals is incoming from input optical fibre, by input optical fibre battle array
It is coupled into array waveguide grid chip 101 between row 103 and array waveguide grid chip 101.Array waveguide grating core
The signal of different wave length is respectively transmitted to different output waveguides by sheet 101, then by array waveguide grid chip 101 and light
It is coupled into each photo-detector between detector array 102, and then changes into photoelectric current, by the mould on circuit board 105
Number converter (ADC) and digital signal processor (DSP) process.The temperature control system of the present embodiment controls array waveguide grid chip
The variations in temperature of 36.4 DEG C can cause the wavelength change of 0.4nm, such excursion namely the channel width of 50GHz.Also
That is, product can realize the sweep length of 50GHz.ITU spectrum barrier (ITU Grid) 100GHz for a standard
The transmission signal of channel spacing, the sweep length of 50G will cover the half of passage spectral line.As reasonably approximation, it is believed that passage
Spectral line is symmetrical, so can be obtained by the spectral line shape of the 100GHz whole passage of spectrum barrier.
By the temperature of temperature control system regulation array waveguide grid chip 101, the work of each output channel can be regulated
Wavelength.By the control realization channel wavelength of temperature is changed, record light by the passband in scanning particular frequency range continuously
Spectrum, obtains spectroscopic data point according to this, and then uses Deconvolution Algorithm Based on Frequency to carry out follow-up signal processing, signal waveform reduced, obtain
Obtain signal spectrum accurately.
Embodiment two:
As in figure 2 it is shown, the difference of the present embodiment and embodiment one is, the present embodiment also comprises film filter 107
Outside photo-detector 108, film filter 107 and photo-detector 108 service aisle with array waveguide grid chip 101
One passage is coupled and aligned and fixes.The present embodiment selectes wavelength by film filter, and is visited by a single pass light
Survey device and realize the self calibration of product.
For array waveguide grid chip 101, in its life cycle, have the centre wavelength drift of about 20pm, institute
So that the hydraulic performance decline of optical performance monitor can be caused.Fig. 2 illustrates how the present invention realizes self calibration: 102j+1It it is product work
Make a passage outside passage, as the interval of itself and 102j and other J passage (for example, it is possible to be 25GHz, or
50GHz, 100GHz), 107 is a film filter, and 108 is a single photo-detector.
The temperature of regulation array waveguide grid chip 101 so that the peak wavelength of last passage and film filter
107 operation wavelengths are consistent, and the light intensity that i.e. photo-detector 108 receives is maximum, and this temperature is set to fiducial temperature.At product
Periodically calibrating temperature in life cycle, calibration procedure is: search the maximum light merit of photo-detector 108 near fiducial temperature
The temperature that rate is corresponding, the difference of this temperature and fiducial temperature is deviation, and this deviation is added to array waveguide grid chip
In the operating temperature of 101, the drift that the wavelength of array waveguide grid chip 101 in life cycle occurs can be corrected.
Embodiment three:
The present embodiment is with the difference of embodiment two, and the present embodiment realizes self calibration by fixed wave length detector 109
Function, as shown in Figure 3.A passage outside the service aisle of fixed wave length detector 109 and array waveguide grid chip 101
Connected by optical fiber.As shown in Figure 4, fixed wave length detector 109 comprises GRIN Lens 1091, photo-detector 1092 and input
Optical fiber 1093, input optical fibre 1093 incoming fiber optic sleeve pipe 1094, the end face that GRIN Lens 1091 couples with photo-detector 1092
It is coated with light filter film 1095.
Input optical signal incides GRIN Lens 1091, is converted to directional light by GRIN Lens 1091, then incident
To the light filter film 1095 of GRIN Lens 1091 end face plating, only part fixed wave length (such as 1550nm) optical signal can lead to
Cross, thus received by photo-detector 1092, be converted into current signal and export through the electrode 1096 of photo-detector 1092.Its self-correcting
Accurate principle is identical with embodiment two with process.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, it is also possible to make some simple deduction or replace, all should be considered as belonging to the present invention's
Protection domain.
Claims (9)
1. the optical performance monitor controlling fiber waveguide based on temperature, it is characterised in that comprise shell, temperature control system, light
Fibre array, array waveguide grid chip, photodetector array and circuit board, described fiber array and array waveguide grid chip
Input is fixing after being coupled and aligned, and described photodetector array is solid after being coupled and aligned with the outfan of array waveguide grid chip
Fixed, described temperature control system comprises temperature controller and hygrosensor, and described array waveguide grid chip is arranged on described temperature
On controller, the output electrode of described photodetector array, the electrode of temperature controller and hygrosensor are electrically connected with circuit board
Connecing, described circuit board reads temperature information and the photoelectric current of photodetector array of hygrosensor, and output temperature controls letter
Number give temperature controller；The temperature of described temperature control system regulation array waveguide grid chip, to regulate the work of each output channel
Making wavelength, it is 0.4nm/k that temperature control system controls the range of temperature of described array waveguide grid chip, and wherein k is described battle array
The temperature correlation coefficient of train wave Waveguide Grating chip output wavelength.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that described temperature
Degree controller is thermoelectric refrigerator.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that described temperature
Degree controller is resistance wire and flaky pottery.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 3, it is characterised in that described
Being filled by conduction oil between shape pottery and array waveguide grid chip, periphery flexible glue is adhesively fixed.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that described light
The input of fibre array and array waveguide grid chip is adhesively fixed by glue after being coupled and aligned, described photodetector array with
The outfan of array waveguide grid chip is adhesively fixed by glue after being coupled and aligned.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that described temperature
Degree detector is critesistor.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that described temperature
Degree detector is resistance temperature detector.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that also comprise
Outside the service aisle of film filter and photo-detector, described film filter and photo-detector and array waveguide grid chip
A passage be coupled and aligned and fix.
The optical performance monitor controlling fiber waveguide based on temperature the most according to claim 1, it is characterised in that also comprise
A passage outside the service aisle of fixed wave length detector, described fixed wave length detector and array waveguide grid chip leads to
Crossing optical fiber to connect, described fixed wave length detector comprises GRIN Lens and photo-detector, described GRIN Lens and optical detection
The end face of device coupling is coated with light filter film.
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| CN110149147A (en) * | 2019-07-02 | 2019-08-20 | 易锐光电科技(安徽)有限公司 | A kind of module and implementation method are monitored for wavelength division multiplex transmission networks network medium wavelength |
| CN111307415B (en) * | 2020-02-24 | 2021-12-07 | 中国科学院微电子研究所 | Optical waveguide transmission system and method for measuring optical waveguide transmission loss |
| CN115061306B (en) * | 2022-07-07 | 2023-10-13 | 京东方科技集团股份有限公司 | Display panel and display device |
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| KR100315705B1 (en) * | 1998-10-22 | 2002-02-19 | 윤종용 | Wavelength Stabilizer for Wavelength Division Multiplexing Transmission System |
| JP2005020459A (en) * | 2003-06-26 | 2005-01-20 | Oki Electric Ind Co Ltd | Optical code division multiplex transmission method and optical code division multiplex transmitting apparatus |
| JP4015091B2 (en) * | 2003-09-17 | 2007-11-28 | 古河電気工業株式会社 | Optical line monitoring device |
| CN201828682U (en) * | 2010-10-20 | 2011-05-11 | 广东海粤集团有限公司 | Planar waveguide array grating wavelength division multiplexer based on temperature control |
| CN102932053A (en) * | 2011-08-10 | 2013-02-13 | 深圳新飞通光电子技术有限公司 | Monitor and monitoring method for optical communication channel |
| CN203299665U (en) * | 2013-06-14 | 2013-11-20 | 深圳新飞通光电子技术有限公司 | An optical performance monitor based on temperature control optical waveguide |
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