WO2022033062A1 - Dispositif d'ajustement de longueur d'onde - Google Patents

Dispositif d'ajustement de longueur d'onde Download PDF

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Publication number
WO2022033062A1
WO2022033062A1 PCT/CN2021/087306 CN2021087306W WO2022033062A1 WO 2022033062 A1 WO2022033062 A1 WO 2022033062A1 CN 2021087306 W CN2021087306 W CN 2021087306W WO 2022033062 A1 WO2022033062 A1 WO 2022033062A1
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WO
WIPO (PCT)
Prior art keywords
wavelength
optical signal
power
light source
lens
Prior art date
Application number
PCT/CN2021/087306
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English (en)
Chinese (zh)
Inventor
汪锋
余洋
赵洁
高建河
郑庆立
郭玲
Original Assignee
武汉光迅科技股份有限公司
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Publication of WO2022033062A1 publication Critical patent/WO2022033062A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/572—Wavelength control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/0014—Monitoring arrangements not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1305—Feedback control systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters

Definitions

  • the present application relates to the technical field of optical communication, and in particular, to a device for adjusting wavelength.
  • wavelength-tunable light sources With the rapid development of optical communication technology, the application of wavelength-tunable light sources is more and more extensive, such as wavelength-tunable lasers. Therefore, how to simply and efficiently realize the wavelength tunability of the light source is a problem that needs to be solved.
  • the embodiment of the present application provides a device for adjusting wavelength, which can simply and efficiently realize wavelength tunability of a light source.
  • the embodiment of the present application provides a device for adjusting wavelength, including:
  • a light source configured to generate a first optical signal
  • a filter element coated with a film layer configured to filter the backscattered light signal of the first light signal
  • a backlight monitoring detector configured to detect the power of the backscattered light signal after passing through the filter element, where the power is related to the wavelength of the first light signal
  • a photodetector configured to detect the power of the second optical signal output by the element other than the device for adjusting the wavelength.
  • the light source comprises: a wavelength tunable laser.
  • the transmittance of the filter element to the backscattered light signal of the first optical signal is related to the wavelength of the first optical signal.
  • the device further comprises: a connector
  • the connector is connected to the element, and the second optical signal generated by the element is incident on the photodetector through the connector.
  • the device further includes: a first lens configured to convert the second optical signal input through the connector into a parallel light beam.
  • the device further includes a beam splitter configured to fully reflect the second optical signal through the first lens to the photodetector.
  • the device further includes: a second lens, the second lens is disposed between the beam splitter and the photodetector, and is configured to reflect the second light reflected by the beam splitter Signals are aggregated.
  • the device further includes:
  • a third lens where the third lens is configured to converge the first optical signal generated by the light source, so that the converged first optical signal is output to an element outside the device.
  • the light source, the filter, and the backlight monitoring detector are packaged within a housing.
  • the light source, the filter, and the backlight monitoring detector are located on the same optical axis.
  • the power variation detected by the backlight monitoring detector includes: a first power variation and a second power variation
  • the first power variation is related to the wavelength variation of the first optical signal
  • the second power variation is related to the initial power of the optical signal generated by the light source.
  • the power variation detected by the backlight monitoring detector is equal to the sum of the product of the first parameter and the first power variation and the product of the second parameter and the second power variation.
  • the device for adjusting wavelength includes: a light source, configured to generate a first optical signal; filtering; a backlight monitoring detector configured to detect the power of the backscattered optical signal after passing through the filter element, the power being related to the wavelength of the first optical signal, and a photodetector configured to detect the power used for the first optical signal
  • the power of the second optical signal output by components other than the wavelength-adjusting device is adjusted.
  • the device for adjusting the wavelength since the power detected by the backlight monitoring detector is related to the wavelength of the optical signal generated by the light source, the device for adjusting the wavelength provided by the embodiments of the present application can be based on the power detected by the backlight monitoring detector The wavelength of the optical signal generated by the light source is adjusted to realize the adjustment of the wavelength of the optical signal generated by the light source.
  • the device for adjusting the wavelength provided in the embodiment of the present application can also receive a second optical signal input by an element other than the device for adjusting the wavelength, so as to realize simultaneous emission and reception of the optical signal; that is, the implementation of the present application
  • the device for adjusting the wavelength used in the example is a single receiving port transceiver integrated device (Bi-Directional Optical Sub-Assembly, BOSA).
  • FIG. 1 is a schematic diagram of an optional structure of a device for adjusting wavelengths provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of the relationship between the wavelength variation of the optical signal and the power variation caused by the wavelength variation according to an embodiment of the present application;
  • FIG. 3 is a schematic diagram of another optional structure of a device for adjusting wavelengths provided by an embodiment of the present application.
  • Fig. 4 is another optional structural schematic diagram of the device for adjusting wavelength provided by the embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a device for adjusting wavelength in the related art.
  • the adjustable optical module has the ability to cover the wavelength range of tens of nanometers in one model, which greatly simplifies the type and quantity of optical module inventory; and can flexibly adjust the wavelength of the optical module, Realize the dynamic redistribution of optical network architecture and service traffic, which greatly saves fiber resources. Therefore, adjusting the wavelength of the optical module has become a research hotspot.
  • tunable optical modules include wavelength-tunable lasers, but the high cost of wavelength-tunable lasers limits their use. Therefore, how to reduce the production cost of the dimmable module and simplify the packaging of the dimmable module has become a key factor for the wide use of the dimmable module.
  • An embodiment of the present application provides a device for adjusting wavelength, and an optional structure of the device 100 for adjusting wavelength, as shown in FIG. 1 , includes:
  • the light source 101 is configured to generate a first optical signal.
  • the light source 101 is a wavelength-tunable light source; such as a wavelength-tunable laser.
  • the filter element 102 coated with the film layer is configured to filter the backscattered light signal of the first light signal
  • the filter element 102 coated with the film layer has different transmittances for optical signals of different wavelengths. For example, after the optical signal with the first wavelength passes through the film-coated filter element 102, A% of the optical signal can pass through the film-coated filter element 102; the light with the second wavelength After the signal passes through the film-coated filter element 102 , B% of the optical signal can pass through the film-coated filter element 102 .
  • the backlight monitoring detector 103 is configured to detect the power of the backscattered light signal after passing through the filter element, where the power is related to the wavelength of the first light signal.
  • the backscattered light signal of the first optical signal transmitted by the filter element detected by the backlight monitoring detector 103 The magnitude of the power is related to the wavelength of the first optical signal.
  • the power of the first optical signal generated by the light source is X
  • the filter element detected by the backlight monitoring detector 103 The power of the backscattered light signal of the transmitted first light signal is M; in the case where the wavelength of the first light signal is the second wavelength, the backscattered light signal detected by the backlight monitoring detector 103 is transmitted through the filter element
  • the power of the backscattered optical signal of the last first optical signal is N.
  • the light source 101 , the film-coated filter element 102 and the backlight monitoring detector 103 are located on the same optical axis, that is, the light source 101 , the film-coated filter element 103 102 and the backlight monitoring detector 103 are arranged on a coaxial platform.
  • the light source 101 , the filter element 102 coated with the film layer and the backlight monitoring detector 103 are packaged in a housing.
  • the power variation detected by the backlight monitoring detector 103 includes: a first power variation and a second power variation
  • the first power variation is related to the wavelength variation of the first optical signal
  • the second power variation is related to the bias and modulation current of the light source.
  • the power variation detected by the backlight monitoring detector 103 is equal to the sum of the product of the first parameter and the first power variation and the product of the second parameter and the second power variation;
  • the following formula P ⁇ *P1+ ⁇ *P2;
  • P is the power change amount detected by the backlight monitoring detector 103;
  • P1 is the power change amount caused by the wavelength change of the first optical signal, that is, the first power change amount;
  • P2 is the bias of the light source and the variation of the power caused by the modulation current, that is, the second power variation.
  • ⁇ is the first parameter, and ⁇ is the second parameter.
  • the amount of power variation caused by the bias and modulation current of the light source is compensated by adjusting the power of the first optical signal generated by the light source.
  • the relationship between the wavelength change of the first optical signal and the power change (first power change) caused by the wavelength change can be separately calculated, and then the light source can be adjusted inversely through the wavelength adjustment function. wavelength. Then calculate the power variation (second power variation) caused by the bias of the light source and the modulation current, and adjust the power of the light source to compensate for the variation of the power caused by the bias of the light source and the modulation current. In this way, the proportional relationship between the first power change amount and the second power change amount can be further calculated, and then the first parameter and the second parameter can be calculated.
  • a standard wavelength light source can be used to determine the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change, and store the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change. Relationship. The relationship between the wavelength change of the optical signal and the power change caused by the wavelength change can be shown in FIG. 2 . As the wavelength increases, the power attenuation increases linearly, that is, the backlight monitoring detector 103 receives The power of the optical signal becomes smaller. Of course, in some embodiments, the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change may also be: as the wavelength increases, the power attenuation decreases linearly, that is, the backlight monitoring detector 103 The power of the received optical signal becomes larger.
  • the function of the backlight monitoring detector 103 may be implemented by an MPD.
  • the embodiment of the present application further provides another device for adjusting wavelength, and another optional structure of the device 100 for adjusting wavelength, as shown in FIG. 3 , in the device for adjusting wavelength shown in FIG. 1 .
  • a photodetector 105, a first lens 106, a beam splitter 107, a second lens 108, a connector 109, and a third lens 110 are added.
  • the photodetector 105 is configured to detect the power of the second optical signal output by components other than the device 100 for adjusting the wavelength.
  • the connector 109 is configured to be connected to an element other than the device 100 for adjusting the wavelength, so that the optical signal generated by the light source 101 is incident on the element through the connector 109, and/or all The optical signal generated by the element is incident to the device 100 for adjusting wavelength through the connector 109 .
  • the connector 109 may be in the form of a pin, a solid connector, or other optical fiber connectors.
  • the first lens 106 is configured to convert the second optical signal input through the connector 109 into a parallel light beam. After the parallel light beam is incident on the beam splitter 107, the incident surface of the beam splitter 107 is completely reflected and then incident on the second lens 108; after the second lens 108 converges the incident parallel light, it is incident on the photodetector device 105.
  • the beam splitting mirror 107 may be composed of one beam splitting element as shown in FIG. 3 , or may be composed of two beam splitting elements as shown in FIG. 4 , or multiple beam splitting elements.
  • the first lens 106 and the second lens 108 improve the efficiency of the photodetector 105 in detecting the power of the second optical signal.
  • the second optical signal is completely reflected by the beam splitter 107, so that the device 100 for adjusting the wavelength can completely isolate the received second optical signal and the outputted first optical signal.
  • the third lens 110, the third lens 110 is configured to convert the convergent light beam output by the light source 101 into a parallel light beam.
  • the third lens 110 and the film-coated filter element 102 are located on both sides of the light source 101 on the same optical axis.
  • the light source 101 is configured to generate a first optical signal.
  • the light source 101 is a wavelength-tunable light source; such as a wavelength-tunable laser.
  • the filter element 102 coated with a film layer is configured to filter the backscattered light signal of the first light signal.
  • the filter element 102 coated with the film layer has different transmittances for optical signals of different wavelengths. For example, after the optical signal with the first wavelength passes through the film-coated filter element 102, A% of the optical signal can pass through the film-coated filter element 102; the light with the second wavelength After the signal passes through the film-coated filter element 102 , B% of the optical signal can pass through the film-coated filter element 102 .
  • the backlight monitoring detector 103 is configured to detect the power of the backscattered light signal after passing through the filter element, where the power is related to the wavelength of the first light signal.
  • the backscattered light signal of the first optical signal transmitted by the filter element detected by the backlight monitoring detector 103 The magnitude of the power is related to the wavelength of the first optical signal.
  • the power of the first optical signal generated by the light source is X
  • the filter element detected by the backlight monitoring detector 103 The power of the backscattered light signal of the transmitted first light signal is M; in the case where the wavelength of the first light signal is the second wavelength, the backscattered light signal detected by the backlight monitoring detector 103 is transmitted through the filter element
  • the power of the backscattered optical signal of the last first optical signal is N.
  • the photodetector 105 is configured to detect the power of the second optical signal output by the elements other than the device 100 for adjusting the wavelength.
  • the light source 101 , the film-coated filter element 102 and the backlight monitoring detector 103 are located on the same optical axis, that is, the light source 101 , the film-coated filter element 103 102 and the backlight monitoring detector 103 are arranged on a coaxial platform.
  • the light source 101, the filter element 102 coated with the film layer and the backlight monitoring detector 103 are packaged in a housing.
  • the power variation detected by the backlight monitoring detector 103 includes: a first power variation and a second power variation
  • the first power variation is related to the wavelength variation of the first optical signal
  • the second power variation is related to the bias and modulation current of the light source.
  • the power variation detected by the backlight monitoring detector 103 is equal to the sum of the product of the first parameter and the first power variation and the product of the second parameter and the second power variation;
  • the following formula P ⁇ *P1+ ⁇ *P2;
  • P is the power change amount detected by the backlight monitoring detector 103;
  • P1 is the power change amount caused by the wavelength change of the first optical signal, that is, the first power change amount;
  • P2 is the bias of the light source and the variation of the power caused by the modulation current, that is, the second power variation.
  • ⁇ is the first parameter, and ⁇ is the second parameter.
  • the amount of power variation caused by the bias and modulation current of the light source is compensated by adjusting the power of the first optical signal generated by the light source.
  • the relationship between the wavelength change of the first optical signal and the power change (first power change) caused by the wavelength change can be separately calculated, and then the light source can be adjusted inversely through the wavelength adjustment function. wavelength. Then calculate the power variation (second power variation) caused by the bias of the light source and the modulation current, and adjust the power of the light source to compensate for the variation of the power caused by the bias of the light source and the modulation current. In this way, the proportional relationship between the first power change amount and the second power change amount can be further calculated, and then the first parameter and the second parameter can be calculated.
  • a standard wavelength light source can be used to determine the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change, and store the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change. Relationship. The relationship between the wavelength change of the optical signal and the power change caused by the wavelength change can be shown in FIG. 2 . As the wavelength increases, the power attenuation increases linearly, that is, the backlight monitoring detector 103 receives The power of the optical signal becomes smaller. Of course, in some embodiments, the relationship between the wavelength change of the optical signal and the power change caused by the wavelength change may also be: as the wavelength increases, the power attenuation decreases linearly, that is, the backlight monitoring detector 103 The power of the received optical signal becomes larger.
  • the function of the backlight monitoring detector 103 may be implemented by an MPD, and the function of the photodetector 105 may be implemented by a PD.
  • the light source 101, the backlight monitoring detector 103, and the filter element 102 coated with a film layer can be packaged in a housing, the photodetector 105 can be packaged in a housing, and the connector 109 can be enclosed in a housing.
  • the first lens 106 , the beam splitter 107 , the second lens 108 and the third lens 110 can be arranged on the same optical platform; according to the types of the above-mentioned components, they can be welded or coupled to the platform.
  • the device for adjusting the wavelength provided by the embodiment of the present application may include two light emission ports, and the two light emission ports may be respectively provided with a backlight monitoring detector and a photodetector to detect the power of the emitted light signal; therefore, this
  • the device for adjusting the wavelength actually provided by the application embodiment is a BOSA.
  • the device for adjusting the wavelength provided in the embodiment of the present application requires fewer components, lower manufacturing process difficulty, lower manufacturing cost and relatively low cost. high productivity.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Semiconductor Lasers (AREA)

Abstract

La présente invention concerne un dispositif d'ajustement de longueur d'onde. Le dispositif d'ajustement de longueur d'onde comprend : une source de lumière, qui est configurée pour générer un premier signal lumineux ; un élément de filtrage, qui est plaqué avec une couche de film et est configuré pour filtrer un signal lumineux rétrodiffusé du premier signal lumineux ; et un détecteur de surveillance de rétroéclairage, qui est configuré pour mesurer la puissance du signal lumineux rétrodiffusé qui a traversé l'élément de filtrage, la puissance étant liée à la longueur d'onde du premier signal lumineux.
PCT/CN2021/087306 2020-08-13 2021-04-14 Dispositif d'ajustement de longueur d'onde WO2022033062A1 (fr)

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CN202010814299.XA CN112073125B (zh) 2020-08-13 2020-08-13 一种用于调节波长的器件
CN202010814299.X 2020-08-13

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CN112073125B (zh) * 2020-08-13 2022-04-08 武汉光迅科技股份有限公司 一种用于调节波长的器件

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CN112073125A (zh) * 2020-08-13 2020-12-11 武汉光迅科技股份有限公司 一种用于调节波长的器件

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CN105634614B (zh) * 2014-10-30 2018-06-05 华为技术有限公司 光发射机、波长对准方法及无源光网络系统
CN110708117B (zh) * 2018-07-09 2022-10-11 中兴通讯股份有限公司 确定光信号的波长信息的方法、装置及存储介质

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EP1218983A1 (fr) * 1999-08-10 2002-07-03 Coretek, Inc. Dispositif de reference de longueur d'onde a etalon unique
US7212555B2 (en) * 2002-11-01 2007-05-01 Finisar Corporation Methods and devices for monitoring the wavelength and power of a laser
CN101601176A (zh) * 2006-12-05 2009-12-09 韩国电子通信研究院 平面光波线路(plc)器件、包括该器件的波长可调光源以及采用该光源的波分复用无源光网络(wdm-pon)
CN109981180A (zh) * 2019-03-15 2019-07-05 武汉电信器件有限公司 一种波长锁定光模块、装置和波长锁定方法
CN112073125A (zh) * 2020-08-13 2020-12-11 武汉光迅科技股份有限公司 一种用于调节波长的器件

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