CN113050239A - Method for adjusting wavelength of optical module by utilizing astigmatism - Google Patents
Method for adjusting wavelength of optical module by utilizing astigmatism Download PDFInfo
- Publication number
- CN113050239A CN113050239A CN202110167068.9A CN202110167068A CN113050239A CN 113050239 A CN113050239 A CN 113050239A CN 202110167068 A CN202110167068 A CN 202110167068A CN 113050239 A CN113050239 A CN 113050239A
- Authority
- CN
- China
- Prior art keywords
- wavelength
- laser
- optical
- optical module
- difference value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G02B6/4266—Thermal aspects, temperature control or temperature monitoring
- G02B6/4268—Cooling
- G02B6/4271—Cooling with thermo electric cooling
-
- 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
-
- 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
Abstract
The invention provides a method for debugging the wavelength of an optical module by utilizing astigmatism, wherein the optical module comprises a plurality of lasers, an optical multiplexer for combining the light of the plurality of lasers into one path and an optical fiber adapter coupled with the optical multiplexer, and the method comprises the following steps: (1) after fixing the laser, the optical multiplexer and the optical fiber adapter, acquiring the wavelength of each laser; (2) comparing the obtained wavelength of each laser with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength; (3) acquiring an average value of the difference value between the wavelength of each laser and the central wavelength, and acquiring a compensation temperature corresponding to the average value of the wavelength difference value according to the corresponding relation between the temperature of the laser and the change of the wavelength; (4) and compensating the temperature of each laser through the semiconductor refrigerator according to the compensation temperature. The invention avoids increasing the repair cost and time and increasing the production cost and difficulty, and the debugging method is simple.
Description
Technical Field
The invention belongs to the technical field of optical communication, and particularly relates to a method for adjusting the wavelength of an optical module by utilizing astigmatism.
Background
The optical module is an important component for constructing an optical communication system, plays a key role in the development of 5G communication and data centers, is closely related to the development and application of high-speed and long-distance optical transmission equipment and intelligent optical networks and the technical progress of optoelectronic devices, and has the main function of realizing photoelectric conversion and further realizing information transmission.
The semiconductor laser can emit laser with different wavelengths, and further optical signal transmission is achieved by adjusting an optical path. Because the working environment of the optical module is complex, the change of temperature can easily cause the drift of wavelength, thereby influencing the change of optical power and even possibly forming crosstalk to interfere the transmission of information. Therefore, the reliability of the optical module can be ensured by screening and debugging the wavelength of the laser.
The traditional method for screening the bad wavelength of the laser is realized by laser aging equipment, however, the laser aging equipment is expensive and has higher operation precision, the wavelength error range allowed by the laser used by some special optical modules is small (such as EML, DWDM and LANWDM modules), the measured value in the aging test process is not accurate enough, and because the clamp can conduct heat, the contact between the laser and the clamp is not tight enough, the test wavelength is not accurate enough, the aging test time is longer, and the production cost and difficulty are increased. Due to the poor wavelength typically found in testing after module assembly, when the module has been patch assembled, rework requires removal of the housing and replacement of the corresponding material, which increases cost and time. In addition, the laser with bad wavelength can affect the magnitude of optical power during coupling, which affects coupling and testing, and further affects the transmission of optical signals.
Disclosure of Invention
The invention aims to provide a method for debugging the wavelength of an optical module by utilizing astigmatism, and aims to solve the problems of high cost and inaccurate test of the conventional method for screening and debugging the wavelength of a laser.
The invention is realized by the following steps:
the invention provides a method for debugging the wavelength of an optical module by utilizing astigmatism, wherein the optical module comprises a plurality of lasers, an optical multiplexer for combining the light of the plurality of lasers into one path and an optical fiber adapter coupled with the optical multiplexer, and the method comprises the following steps:
(1) after fixing the laser, the optical multiplexer and the optical fiber adapter, acquiring the wavelength of each laser;
(2) comparing the obtained wavelength of each laser with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength;
(3) acquiring an average value of the difference value between the wavelength of each laser and the central wavelength, and acquiring a compensation temperature corresponding to the average value of the wavelength difference value according to the corresponding relation between the temperature of the laser and the change of the wavelength;
(4) and compensating the temperature of each laser through the semiconductor refrigerator according to the compensation temperature.
Further, the method for acquiring the wavelength of each laser in the step (1) comprises the following steps: and controlling the switch of each laser through the upper computer, and acquiring the wavelength of each laser through a spectrometer connected with the optical fiber adapter.
Further, between the optical multiplexer and the optical fiber adapter, there is a light converging element for guiding a part of the light of the laser into the optical fiber, and the method further includes: firstly coupling the light converging element and then debugging the wavelength of the optical module.
Further, a collimating lens for collimating light emitted by the laser is provided between each laser and the optical multiplexer, and the method further includes: firstly, the wavelength of an optical module is debugged, and then a collimating lens is coupled.
Further, the step (2) is followed by: and acquiring a difference value between the maximum value and the minimum value of the wavelength difference value, if the difference value is within the range required by the optical communication protocol, performing a subsequent debugging step, and if the difference value is outside the range required by the optical communication protocol, judging that the optical module is a defective product.
Further, the step (4) is followed by: and acquiring the wavelength with the maximum difference value with the corresponding central wavelength from the wavelengths of the debugged lasers, judging whether the wavelength meets the condition, and if not, judging that the optical module is a defective product.
Further, the method further comprises: and recording and storing the data in the debugging process.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, after the laser, the optical multiplexer and the optical fiber adapter are fixed, namely before the optical module is assembled, the wavelength of the laser is tested, and the poor laser can be compensated or replaced before the optical module is assembled, so that the problems that the test is carried out after the optical module is assembled, and corresponding materials need to be disassembled for inspection or replaced when the wavelength is poor, and the repair cost and time are increased are solved; the invention does not need to test the wavelength of the laser through laser aging equipment, thereby avoiding increasing the production cost and difficulty; the invention controls the working temperature of the laser based on adjusting the temperature of the semiconductor cooler (TEC) so as to achieve the purpose of adjusting the wavelength of the optical module, and the adjusting method is simple;
(2) the optical convergence element is coupled and adjusted firstly, then the wavelength of the laser is debugged, and the optical power is increased after the optical convergence element is coupled, so that the wavelength of the tested laser is more accurate, and the subsequent debugging of the wavelength of the laser is more accurate;
(3) the wavelength of the laser is debugged firstly, and then the collimating lens is coupled, so that the poor laser can be tested before the collimating lens is coupled for compensation or replacement, and because the optical multiplexer is provided with the grating, when the wavelength of the laser exceeds the upper limit or the lower limit, part of light can not pass through the grating when the light passes through the grating, so that the optical power is lower when the collimating lens is coupled, and the coupling difficulty is increased.
Drawings
Fig. 1 is a schematic flowchart of a method for adjusting a wavelength of an optical module using astigmatism according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a 100G LR multi-transmitting-end optical module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for adjusting a wavelength of an optical module using astigmatism, where the optical module includes a plurality of lasers, an optical multiplexer for combining light of the plurality of lasers into one path, and an optical fiber adapter coupled to the optical multiplexer, and the method includes the following steps:
(1) after fixing the laser, the optical multiplexer and the optical fiber adapter, acquiring the wavelength of each laser;
(2) comparing the obtained wavelength of each laser with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength;
(3) acquiring an average value of the difference value between the wavelength of each laser and the central wavelength, and acquiring a compensation temperature corresponding to the average value of the wavelength difference value according to the corresponding relation between the temperature of the laser and the change of the wavelength;
(4) and compensating the temperature of each laser through the semiconductor refrigerator according to the compensation temperature.
According to the embodiment of the invention, after the laser, the optical multiplexer and the optical fiber adapter are fixed, namely before the optical module is assembled, the wavelength of the laser is tested, and the poor laser can be compensated or replaced before the optical module is assembled, so that the problems that the test is carried out after the optical module is assembled, and corresponding materials need to be disassembled for inspection or replaced when the wavelength is poor, and the repair cost and time are increased are solved; the invention does not need to test the wavelength of the laser through laser aging equipment, thereby avoiding increasing the production cost and difficulty; the invention controls the working temperature of the laser based on the adjustment of the temperature of the semiconductor cooler (TEC) so as to achieve the purpose of adjusting the wavelength of the optical module, and the adjusting method is simple.
The above steps will be described in detail below.
In the step (1), the wavelength of the laser is tested after the laser, the optical multiplexer and the optical fiber adapter are fixed, rather than debugging after all the optical modules are assembled, so that the problems that the test is carried out after the optical modules are assembled, and corresponding materials need to be disassembled for inspection or replaced when the wavelength is poor, and the repair cost and time are increased are solved. In this embodiment, the method for obtaining the wavelength of each laser includes: the upper computer controls the on-off of each laser, the corresponding laser is turned on when the wavelength of the laser needs to be tested, other lasers are turned off, the wavelength of each laser is obtained through the spectrometer connected with the optical fiber adapter, and the wavelength of each laser measured by the spectrometer is set to be x1,x2,x3…xn。
In the step (2), the obtained wavelength of each laser is compared with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength; the central wavelength is the standard wavelength, and the central wavelength of each laser of the optical module is set as y1、y2、y3…ynThe difference between the obtained wavelength of each laser and the central wavelength is m1,m2,m3…mn。
In order to enable the wavelength of each channel laser to meet the working range of the laser, the average value m of the wavelength difference values of the channel lasers can be used for compensation, and the actual temperature required by the laser to work can be obtained according to the change relation between the wavelength of the laser and the temperature. In the step (3), an average value of the difference between the wavelength of each laser and the central wavelength is obtained, and the compensation temperature corresponding to the average value of the wavelength difference is obtained according to the corresponding relationship between the temperature of the laser and the change of the wavelength.
In the step (4), the temperature of each laser is compensated by the semiconductor refrigerator according to the compensation temperature, and the wavelength of the laser is adjusted and controlled by changing the temperature of the semiconductor refrigerator.
In order to optimize the above embodiment, a light converging element for guiding a part of light of a laser into an optical fiber is provided between the optical multiplexer and the optical fiber adapter, and the method further includes: the light converging element is coupled firstly, then the wavelength of the optical module is debugged, and the light power is increased after the light converging element is coupled, so that the wavelength of the tested laser is more accurate, and the subsequent debugging of the wavelength of the laser is more accurate. Further preferably, a collimating lens for collimating light emitted from the laser is provided between each of the lasers and the optical multiplexer, and the method further includes: the wavelength of the optical module is debugged first, and then the collimating lens is coupled, so that a poor laser can be tested before the collimating lens is coupled for compensation or replacement, and due to the fact that the optical grating is arranged on the optical multiplexer, when the wavelength of the laser exceeds the upper limit or the lower limit, part of light can not pass through the grating when the light passes through the grating, so that the optical power is low when the collimating lens is coupled, and the coupling difficulty is increased.
Because the wavelength of the laser is only allowed to fluctuate within a certain range of the central wavelength, the range is determined according to the requirements of the optical communication protocol, and when the difference value between the maximum value and the minimum value in the difference values between the wavelength of each laser and the central wavelength is larger than the range required by the optical communication protocol, the wavelength of at least one laser does not meet the requirements no matter how the laser is debugged. Continuing to optimize the above embodiment, step (2) is followed by: and acquiring a difference value between the maximum value and the minimum value of the wavelength difference value, if the difference value is within the range required by the optical communication protocol, performing a subsequent debugging step, and if the difference value is outside the range required by the optical communication protocol, judging that the optical module is a defective product. Further optimally, the step (4) is followed by: and acquiring the wavelength with the maximum difference value with the corresponding central wavelength from the wavelengths of the debugged lasers, judging whether the wavelength meets the condition, and if not, judging that the optical module is a defective product.
Preferably, the method further comprises: and data in the debugging process is recorded and stored, so that the data can be conveniently consulted and analyzed.
The following describes embodiments of the present invention in detail by taking the wavelength tuning of a 100G LR multi-emitter optical module as an example. As shown in fig. 2, the main components of the 100G LR multi-transmitting-end optical module are: the optical fiber adapter comprises four lasers with specific wavelength ranges, collimating lenses for collimating light emitted by the lasers, an optical Multiplexer (MUX) for combining multiple paths of collimated light into one path, an optical converging element for optically coupling light from the optical multiplexer into the optical fiber adapter, and the optical fiber adapter.
Connecting and electrifying the optical module coupled with the light converging element with a spectrometer, controlling the switch of each channel laser by using an upper computer to obtain the wavelength of each channel and the temperature of the semiconductor refrigerator, and recording the temperature and wavelength data;
and adjusting the temperature of the semiconductor refrigerator according to the corresponding relation between the temperature and the change of the wavelength by comparing with the central wavelength. Taking the central wavelengths of the lasers as 1295nm, 1300nm, 1305nm and 1310nm as examples, if the measured differences between the wavelengths of the lasers and the above-mentioned wavelengths are-0.054, 0.032, 0.548 and 0.492nm, the average value is 0.255nm, and the relationship between the laser temperature and the wavelength variation is: when the wavelength changes by 0.1nm every time the temperature is increased by one degree, the corresponding compensation temperature is 2.55 ℃; the temperature of the semiconductor refrigerator is controlled by the upper computer to be increased by 2.55 ℃.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A method for adjusting a wavelength of an optical module using astigmatism, the optical module including a plurality of lasers, an optical multiplexer for combining light of the plurality of lasers into one path, and an optical fiber adapter coupled to the optical multiplexer, the method comprising the steps of:
(1) after fixing the laser, the optical multiplexer and the optical fiber adapter, acquiring the wavelength of each laser;
(2) comparing the obtained wavelength of each laser with the corresponding central wavelength to obtain a difference value between the wavelength and the central wavelength;
(3) acquiring an average value of the difference value between the wavelength of each laser and the central wavelength, and acquiring a compensation temperature corresponding to the average value of the wavelength difference value according to the corresponding relation between the temperature of the laser and the change of the wavelength;
(4) and compensating the temperature of each laser through the semiconductor refrigerator according to the compensation temperature.
2. The method for adjusting the wavelength of an optical module using astigmatism as claimed in claim 1, wherein the method for acquiring the wavelength of each laser in the step (1) is as follows: and controlling the switch of each laser through the upper computer, and acquiring the wavelength of each laser through a spectrometer connected with the optical fiber adapter.
3. The method for adjusting a wavelength of an optical module using astigmatism according to claim 2, wherein a light converging element for guiding a part of light of a laser into an optical fiber is provided between the optical multiplexer and the optical fiber adapter, the method further comprising: firstly coupling the light converging element and then debugging the wavelength of the optical module.
4. The method for adjusting a wavelength of an optical module using astigmatism according to claim 1, wherein each of the lasers has a collimating lens for collimating light emitted from the laser with the optical multiplexer, the method further comprising: firstly, the wavelength of an optical module is debugged, and then a collimating lens is coupled.
5. A method for tuning the wavelength of an optical module using astigmatism as claimed in claim 1, wherein: the step (2) is followed by: and acquiring a difference value between the maximum value and the minimum value of the wavelength difference value, if the difference value is within the range required by the optical communication protocol, performing a subsequent debugging step, and if the difference value is outside the range required by the optical communication protocol, judging that the optical module is a defective product.
6. A method for tuning the wavelength of an optical module using astigmatism as claimed in claim 1, wherein: the step (4) is followed by: and acquiring the wavelength with the maximum difference value with the corresponding central wavelength from the wavelengths of the debugged lasers, judging whether the wavelength meets the condition, and if not, judging that the optical module is a defective product.
7. A method for tuning the wavelength of an optical module using astigmatism as claimed in claim 1, the method further comprising: and recording and storing the data in the debugging process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167068.9A CN113050239B (en) | 2021-02-05 | 2021-02-05 | Method for adjusting wavelength of optical module by utilizing astigmatism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167068.9A CN113050239B (en) | 2021-02-05 | 2021-02-05 | Method for adjusting wavelength of optical module by utilizing astigmatism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113050239A true CN113050239A (en) | 2021-06-29 |
| CN113050239B CN113050239B (en) | 2022-01-14 |
Family
ID=76508737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110167068.9A Active CN113050239B (en) | 2021-02-05 | 2021-02-05 | Method for adjusting wavelength of optical module by utilizing astigmatism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113050239B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167556A (en) * | 2021-12-10 | 2022-03-11 | 深圳市欧深特信息技术有限公司 | Wavelength adjusting method of multi-channel optical module, optical module and storage medium |
| CN114414497A (en) * | 2022-01-06 | 2022-04-29 | 江苏奥雷光电有限公司 | Full-automatic spectrum test calibration method and system for multi-channel light source product |
| CN115857121A (en) * | 2023-02-28 | 2023-03-28 | 武汉英飞光创科技有限公司 | Wavelength debugging method for multi-channel optical module and optical module |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050169327A1 (en) * | 1998-10-20 | 2005-08-04 | Quantum Devices, Inc. | Method and apparatus reducing electrical and thermal crosstalk of a laser array |
| CN101471539A (en) * | 2007-12-29 | 2009-07-01 | 华为技术有限公司 | Method and system for controlling multipath laser wavelength |
| CN201623709U (en) * | 2010-03-16 | 2010-11-03 | 索尔思光电（成都）有限公司 | DWDM optical module capable of tuning 50GHz and 100 GHz channel spacing |
| CN105610048A (en) * | 2016-03-23 | 2016-05-25 | 青岛海信宽带多媒体技术有限公司 | Optical module production method and device, optical module driving method and optical module |
| JP2018031622A (en) * | 2016-08-23 | 2018-03-01 | 三菱電機株式会社 | Determination apparatus and determination method |
| CN111722330A (en) * | 2020-06-24 | 2020-09-29 | 武汉英飞光创科技有限公司 | Optical module packaging method, optical module and optical transmitter |
| CN111756469A (en) * | 2020-06-09 | 2020-10-09 | 杭州兰特普光电子技术有限公司 | Optical module wavelength locking method, optical module and DWDM network |
-
2021
- 2021-02-05 CN CN202110167068.9A patent/CN113050239B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050169327A1 (en) * | 1998-10-20 | 2005-08-04 | Quantum Devices, Inc. | Method and apparatus reducing electrical and thermal crosstalk of a laser array |
| CN101471539A (en) * | 2007-12-29 | 2009-07-01 | 华为技术有限公司 | Method and system for controlling multipath laser wavelength |
| CN201623709U (en) * | 2010-03-16 | 2010-11-03 | 索尔思光电（成都）有限公司 | DWDM optical module capable of tuning 50GHz and 100 GHz channel spacing |
| CN105610048A (en) * | 2016-03-23 | 2016-05-25 | 青岛海信宽带多媒体技术有限公司 | Optical module production method and device, optical module driving method and optical module |
| JP2018031622A (en) * | 2016-08-23 | 2018-03-01 | 三菱電機株式会社 | Determination apparatus and determination method |
| CN111756469A (en) * | 2020-06-09 | 2020-10-09 | 杭州兰特普光电子技术有限公司 | Optical module wavelength locking method, optical module and DWDM network |
| CN111722330A (en) * | 2020-06-24 | 2020-09-29 | 武汉英飞光创科技有限公司 | Optical module packaging method, optical module and optical transmitter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167556A (en) * | 2021-12-10 | 2022-03-11 | 深圳市欧深特信息技术有限公司 | Wavelength adjusting method of multi-channel optical module, optical module and storage medium |
| CN114167556B (en) * | 2021-12-10 | 2022-12-20 | 深圳市欧深特信息技术有限公司 | Wavelength adjusting method of multi-channel optical module, optical module and storage medium |
| CN114414497A (en) * | 2022-01-06 | 2022-04-29 | 江苏奥雷光电有限公司 | Full-automatic spectrum test calibration method and system for multi-channel light source product |
| CN115857121A (en) * | 2023-02-28 | 2023-03-28 | 武汉英飞光创科技有限公司 | Wavelength debugging method for multi-channel optical module and optical module |
| CN115857121B (en) * | 2023-02-28 | 2023-04-28 | 武汉英飞光创科技有限公司 | Multichannel optical module wavelength debugging method and optical module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113050239B (en) | 2022-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113050239B (en) | Method for adjusting wavelength of optical module by utilizing astigmatism | |
| CN204089820U (en) | optical module performance parameter testing device | |
| CN112422182B (en) | Multifunctional adjusting and measuring device and method for WDM (wavelength division multiplexing) optical module | |
| CN105790827B (en) | ONT Optical Network Terminal BOB calibration test systems and its method | |
| US8175432B2 (en) | Method of adjusting optical axis of optical waveguide element, and optical waveguide element | |
| CN107677452A (en) | A kind of less fundamental mode optical fibre comprehensive tester and method of testing | |
| CN102882115B (en) | Evolutionary operation algorithm for electric absorption reverse bias voltage of EML (electo-absorption modulated laser) | |
| CN114614891B (en) | Avalanche photodetector light responsivity measurement system and measurement method | |
| JPH11183324A (en) | Optical component characteristic measuring system | |
| CN102829952A (en) | Semiconductor laser calibrating and testing method and application thereof | |
| CN113381805B (en) | TOSA bandwidth rapid measurement device and method based on vector network analyzer | |
| WO2017181916A1 (en) | Method for automatically calibrating bidirectional light receiving and emitting power of pon network device | |
| CN112688731A (en) | Multichannel TEC quick temperature change system | |
| CN113566861A (en) | Polarization state calibration device and calibration method for optical fiber polarization analyzer | |
| WO2018058805A1 (en) | High-speed device based on spectral accurate matching technology | |
| CN108234017B (en) | EDFA full-automatic testing method and system | |
| CN216751765U (en) | Device for evaluating transceiving performance parameters of optical module through multi-channel test | |
| CN105204124A (en) | Optical module and optical fiber coupling detection method | |
| CN113324665B (en) | Wavemeter, method for obtaining parameters of wavemeter and method for on-line calibration | |
| US8248587B2 (en) | Testing method of semiconductor laser and laser testing device | |
| CN217469958U (en) | Optical module wavelength test system | |
| JP4067527B2 (en) | Method and apparatus for providing controllable second-order polarization mode dispersion | |
| CN213693706U (en) | Multichannel TEC temperature change system | |
| CN116026563A (en) | Multi-channel optical cable testing system and method | |
| US20220404210A1 (en) | Apparatus and method for qualifying light sources for use in optical fiber communications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method of adjusting the wavelength of Optical module by using astigmatism Effective date of registration: 20230629 Granted publication date: 20220114 Pledgee: China Construction Bank Corporation Wuhan Provincial Sub-branch Pledgor: WUHAN YINGFEI GUANGCHUANG TECHNOLOGY Co.,Ltd. Registration number: Y2023420000273 |