CN112710332A - Method and system for calibrating output power of optical fiber gyroscope - Google Patents
Method and system for calibrating output power of optical fiber gyroscope Download PDFInfo
- Publication number
- CN112710332A CN112710332A CN202011516494.0A CN202011516494A CN112710332A CN 112710332 A CN112710332 A CN 112710332A CN 202011516494 A CN202011516494 A CN 202011516494A CN 112710332 A CN112710332 A CN 112710332A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- output power
- optical
- fiber gyroscope
- light intensity
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims abstract description 72
- 239000000835 fiber Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 4
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
- G01C25/005—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention discloses a method and a system for calibrating the output power of an optical fiber gyroscope, when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, the output power of the optical part of the optical fiber gyroscope is corrected, and the output power correction parameters of the optical part are stored; when the optical part and the electrical part of the optical fiber gyroscope are assembled, the output power correction parameters are called to correct the electrical part of the optical fiber gyroscope, the calibration action of the success rate is completed before the optical fiber gyroscope is assembled integrally, the calibration difficulty is reduced, the optical fiber gyroscope caused by the calibration failure of the optical part device of the optical fiber gyroscope is avoided being scrapped, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of optical gyroscope correction, in particular to a method and a system for calibrating the output power of an optical fiber gyroscope.
Background
The optical fiber gyroscope uses the interference light intensity of the forward and reverse transmitted optical signals in the optical fiber ring at the photoelectric conversion module to judge the rotation angular velocity. Ideally, the interference light intensity at the photoelectric conversion module is strongest without any optical delay modulation applied by the Y waveguide and without rotation. However, in the actual situation, when the optical fiber gyroscope is static and no optical delay modulation is added to the Y waveguide due to stress, a small defect of the optical fiber, an assembly error and the like in the process of the sensitive loop system, the light intensity obtained at the photoelectric conversion module is not the maximum value, the optical fiber gyroscope adopts a calibration mode to solve the problems at present, the calibration refers to calibrating the calibration value after the optical fiber gyroscope is integrally processed and calibrated according to the offset, and two problems exist: for reducing mechanical stress and influencing the fiber optic gyroscope, the optic fibre ring of fiber optic gyroscope often adopts non-detachable mounting means (pasting if the solidification of UV glues) in the assembling process, assemble into the whole back of gyroscope, optics part can't dismantle alone, and the whole bulky of fiber optic gyroscope, lead to the increase of the operation degree of difficulty of current fiber optic gyroscope correction, and calibration efficiency is low, furthermore, the whole fiber optic gyroscope of calibration failure all needs to do nothing after the equipment is accomplished, this cost rise who has also led to the fiber optic gyroscope, therefore, the current fiber optic gyroscope equipment adopts the increase of the operation degree of difficulty of correction that non-detachable installation and whole bulky caused, the low problem that waits to solve of technical staff in the field of correction efficiency.
Disclosure of Invention
The invention provides a method and a system for calibrating the output power of an optical fiber gyroscope, which are used for solving the technical problems of increased calibration operation difficulty and low calibration efficiency caused by non-detachable installation and large integral volume of the existing optical fiber gyroscope assembly.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an optical fiber gyroscope output power calibration method comprises the following steps:
when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, correcting the output power of the optical part of the optical fiber gyroscope and storing the output power correction parameters of the optical part; and when the optical part and the electrical part of the optical fiber gyroscope are assembled, calling the output power correction parameters to correct the electrical part of the optical fiber gyroscope.
Preferably, the output power correction parameters include an initial bias driving amount adjusted by the Y waveguide and an initial driving current value of the laser, and the output power of the optical part of the fiber optic gyroscope is corrected, including the following steps:
setting a driving current value of the laser, and adjusting the time delay of two paths of laser in a Y waveguide of the laser until the photoelectric conversion module outputs a maximum light intensity value;
comparing the maximum light intensity value with the reference light intensity value, and when the maximum light intensity value is equal to the reference light intensity value, storing the bias driving quantity of the Y waveguide as an initial bias driving quantity, and storing the driving current value of the laser as an initial driving current value; and when the maximum light intensity value is not equal to the reference light intensity value, adjusting the driving current value of the laser until the maximum light intensity value is equal to the reference light intensity value, storing the bias driving quantity of the Y waveguide as an initial bias driving quantity, and storing the driving current value of the laser as an initial driving current value.
Preferably, the reference light intensity value is obtained by any one of the following methods:
the method comprises the following steps: obtaining according to the previous product debugging process;
the second method comprises the following steps: and calculating according to the optical path attenuation.
Preferably, the output power correction parameter is stored in a memory unit bound to the optical part in the fiber-optic gyroscope.
Preferably, the step of calling the output power correction parameter to correct the electrical part of the optical fiber gyroscope includes the following steps:
and a control module of the electrical part reads the output power correction parameter of the storage unit, controls the electrical part to output the initial bias driving quantity to the Y waveguide and outputs the initial driving current value to the laser.
A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the methods described above when executing the computer program.
The invention has the following beneficial effects:
1. according to the method and the system for calibrating the output power of the optical fiber gyroscope, when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, the output power of the optical part of the optical fiber gyroscope is calibrated, and the output power calibration parameters of the optical part are stored; when the optical part and the electrical part of the optical fiber gyroscope are assembled, the output power correction parameters are called to correct the electrical part of the optical fiber gyroscope, the calibration action of the success rate is completed before the optical fiber gyroscope is assembled integrally, the calibration difficulty is reduced, the optical fiber gyroscope caused by the calibration failure of the optical part device of the optical fiber gyroscope is avoided being scrapped, and the production efficiency is improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart of a method for calibrating output power of an optical fiber gyroscope according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of an optical fiber gyro in a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a Y-waveguide structure of the optical fiber gyro in the preferred embodiment of the present invention;
FIG. 4 is a graph of voltage versus time delay on a lithium niobate crystal of the optical fiber gyroscope in a preferred embodiment of the present invention;
FIG. 5 is a flow chart of the correction of the optical portion in the preferred embodiment of the present invention;
FIG. 6 is a graph of Y-waveguide bias voltage versus light intensity value for the optical portion in a preferred embodiment of the present invention;
fig. 7 is a flow chart of the correction of the electrical part in the preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment discloses a method for calibrating output power of an optical fiber gyroscope, which includes the following steps:
when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, correcting the output power of the optical part of the optical fiber gyroscope and storing the output power correction parameters of the optical part; and when the optical part and the electrical part of the optical fiber gyroscope are assembled, calling the output power correction parameters to correct the electrical part of the optical fiber gyroscope.
In addition, in this embodiment, a computer system is also disclosed, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of any one of the methods described above are implemented.
According to the method and the system for calibrating the output power of the optical fiber gyroscope, when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, the output power of the optical part of the optical fiber gyroscope is calibrated, and the output power calibration parameters of the optical part are stored; when the optical part and the electrical part of the optical fiber gyroscope are assembled, the output power correction parameters are called to correct the electrical part of the optical fiber gyroscope, the calibration action of the success rate is completed before the optical fiber gyroscope is assembled integrally, the calibration difficulty is reduced, the optical fiber gyroscope caused by the calibration failure of the optical part device of the optical fiber gyroscope is avoided being scrapped, and the production efficiency is improved.
Example two:
the second embodiment is a preferred embodiment of the first embodiment, and is different from the first embodiment in that the method for calibrating the output power of the optical fiber gyroscope is refined:
as shown in fig. 2, in this embodiment, the fiber optic gyroscope to be calibrated includes an optical portion and an electrical portion, where the optical portion includes a laser, a coupler, a Y waveguide, and a fiber ring, which are connected in sequence, and the optical portion is further added with a storage unit; the electricity part includes laser instrument drive module, photoelectric detector, signal conditioning module, AD conversion module, logic processing module and drive circuit module, logic processing module respectively with AD conversion module, drive circuit module and laser instrument drive module connect, AD conversion module signal conditioning module, photoelectric detector, coupler connect gradually, drive circuit is connected with the Y waveguide.
The structure of the Y waveguide is shown in fig. 3, the Y waveguide is a multifunctional optical module including a lithium niobate crystal, wherein the lithium niobate is a substance whose refractive index changes with the applied voltage, so the delay of light after transmitting the lithium niobate crystal is adjusted by adjusting the voltage applied to the lithium niobate crystal, as shown in fig. 4, within a certain range, the voltage and the delay on the lithium niobate crystal are in a linear relationship, wherein the main components of the first optical path and the second optical path are the lithium niobate crystal, the two sides of the first optical path and the second optical path are electrodes, and the adjustment of the delay of the lithium niobate crystal is realized by adjusting the voltage applied to the two ends of the electrodes.
In the production process of the optical fiber gyroscope, the production process of an optical part is firstly carried out, and the production process mainly comprises the following steps:
firstly, sequentially welding a laser, a coupler and a Y waveguide;
secondly, welding the Y waveguide and the optical fiber ring;
and thirdly, configuring the optical device of the optical part with a storage device for storing relevant matching parameters, wherein the storage device is preferably configured with a memory of SPI (Serial Peripheral Interface) or an EEROM (Electrically Erasable Programmable read only memory).
In this embodiment, the specific steps of the disclosed calibration method for the output power of the optical fiber gyroscope are as follows:
firstly, correcting an optical part:
as shown in fig. 5, the correction process of the optical portion is as follows:
after the optical part is assembled (the electronic part is not assembled), the optical part needs to be individually calibrated by using a tool of the substitute electronic part to ensure the consistency of the optical part, as shown in fig. 6, the bias voltage of the Y waveguide is in a linear relation with the light intensity within a certain range, so that the laser drive can be set to a default value after the system is powered on, and the delay of the Y waveguide to two paths of light is adjusted until the maximum output value of the photoelectric conversion module, and at this time, the phase deviation of the optical system can be considered to be eliminated.
At this time, whether the light intensity value acquired by the photoelectric conversion module is the same as a preset light intensity value is judged, wherein the preset light intensity value can be acquired according to the previous product debugging process and can also be acquired according to the optical path attenuation calculation. Wherein, calculating according to the optical path attenuation specifically comprises: acquiring a light intensity value of the emitted laser of the first optical channel and an attenuation coefficient of the first optical channel, and calculating a first actual light intensity value when the emitted laser of the first optical channel is input into the Y waveguide; and obtaining the light intensity value of the laser emitted by the second optical channel and the attenuation coefficient of the second optical channel, calculating a second actual light intensity value when the laser emitted by the second optical channel is input into the Y waveguide, and calculating a preset light intensity value according to the first actual light intensity value, the second actual light intensity value and the loss of the first actual light intensity value in the Y waveguide.
If the difference is different, the optical module needs calibration, and if the difference is the same, the calibration is not needed, and the adjusted bias driving quantity of the Y waveguide and the driving current of the laser are directly recorded.
Keeping the bias drive of the Y waveguide unchanged under the condition of needing calibration, adjusting the drive current of the laser, and reducing the drive current output by a laser drive circuit if the light intensity is greater than a preset value; and if the light intensity is smaller than the preset value, increasing the driving current output by the laser driving circuit until the light intensity acquired by the photoelectric conversion module is equal to the preset value. At this time, the adjusted bias driving amount of the Y waveguide and the driving current of the laser are recorded. By the time the calibration is completed, the optical part and the parameters thereof can be used for the subsequent assembly of the optical fiber gyroscope into the whole body
Second, correction of electrical part:
as shown in fig. 7, after the optical fiber gyro is assembled as a whole, the power-on logic processing module in the control module of the electrical part first reads initial values of the laser driver circuit output and the Y waveguide bias adjustment from the memory unit of the optical part, and initializes the laser driver circuit and the Y waveguide driver circuit with the initial values. Thereby completing the initial initialization of the optical fiber gyro. Then the whole corresponding calibration work that carries out of fiber gyroscope, because the optics part has accomplished the calibration, later calibration time can shorten greatly, can save calibration time on the one hand, can promote production efficiency on the one hand by a wide margin.
In summary, in the method and system for calibrating the output power of the optical fiber gyroscope, when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, the output power of the optical part of the optical fiber gyroscope is calibrated, and the output power calibration parameters of the optical part are saved; when the optical part and the electrical part of the optical fiber gyroscope are assembled, the output power correction parameters are called to correct the electrical part of the optical fiber gyroscope, the calibration action of the success rate is completed before the optical fiber gyroscope is assembled integrally, the calibration difficulty is reduced, the optical fiber gyroscope caused by the calibration failure of the optical part device of the optical fiber gyroscope is avoided being scrapped, and the production efficiency is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An optical fiber gyroscope output power calibration method is characterized by comprising the following steps:
when the optical part of the optical fiber gyroscope is assembled and the electrical part is not assembled, correcting the output power of the optical part of the optical fiber gyroscope and saving the output power correction parameters of the optical part;
and when the optical part and the electrical part of the optical fiber gyroscope are assembled, calling the output power correction parameter to correct the electrical part of the optical fiber gyroscope.
2. The method for calibrating the output power of the optical fiber gyroscope according to claim 1, wherein the output power calibration parameters include an initial bias driving amount of Y waveguide adjustment and an initial driving current value of a laser, and the output power of the optical part of the optical fiber gyroscope is calibrated, and the method comprises the following steps:
setting a driving current value of the laser, and adjusting time delay of two paths of laser in a Y waveguide of the laser until the photoelectric conversion module outputs a maximum light intensity value;
comparing the maximum light intensity value with a reference light intensity value, and when the maximum light intensity value is equal to the reference light intensity value, storing the bias driving quantity of the Y waveguide as an initial bias driving quantity, and storing the driving current value of the laser as an initial driving current value; and when the maximum light intensity value is not equal to the reference light intensity value, adjusting the driving current value of the laser until the maximum light intensity value is equal to the reference light intensity value, storing the bias driving quantity of the Y waveguide as an initial bias driving quantity, and storing the driving current value of the laser as an initial driving current value.
3. The method for calibrating the output power of the optical fiber gyroscope according to claim 2, wherein the reference light intensity value is obtained by any one of the following methods:
the method comprises the following steps: obtaining according to the previous product debugging process;
the second method comprises the following steps: and calculating according to the optical path attenuation.
4. The method for calibrating output power of a fiber optic gyroscope of claim 3, wherein the output power correction parameter is stored in a storage unit bound to the optical portion in the fiber optic gyroscope.
5. The method for calibrating the output power of the optical fiber gyroscope according to claim 4, wherein the step of invoking the output power correction parameter to correct the electrical part of the optical fiber gyroscope comprises the steps of:
and the control module of the electrical part reads the output power correction parameter of the storage unit, controls the electrical part to output the initial bias driving quantity to the Y waveguide and outputs an initial driving current value to the laser.
6. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any one of claims 1 to 5 are performed when the computer program is executed by the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011516494.0A CN112710332B (en) | 2020-12-21 | Output power calibration method and system for optical fiber gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011516494.0A CN112710332B (en) | 2020-12-21 | Output power calibration method and system for optical fiber gyroscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112710332A true CN112710332A (en) | 2021-04-27 |
| CN112710332B CN112710332B (en) | 2024-09-24 |
Family
ID=
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148714A (en) * | 1984-08-17 | 1986-03-10 | Tech Res & Dev Inst Of Japan Def Agency | Drift correction system of optical gyro |
| JPH06265360A (en) * | 1993-03-11 | 1994-09-20 | Hitachi Ltd | Optical-fiber gyro and its detection-signal correction method |
| CN101408427A (en) * | 2008-11-19 | 2009-04-15 | 中国航天时代电子公司 | Distributed layer-dividing grade temperature error compensating method of optical fiber gyroscope |
| CN101750058A (en) * | 2008-12-09 | 2010-06-23 | 姜恩颖 | Optical fiber gyroscope with centre wavelength monitoring and regulating function |
| CN102759366A (en) * | 2012-07-11 | 2012-10-31 | 北京理工大学 | Detection device of optical fiber gyroscope optical module |
| RU2482450C1 (en) * | 2011-12-16 | 2013-05-20 | Федеральное государственное унитарное предприятие "Центр эксплуатации объектов наземной космической инфраструктуры" (ФГУП "ЦЭНКИ") | Apparatus for testing electronic unit of fibre-optic gyroscope |
| KR20130107979A (en) * | 2012-03-23 | 2013-10-02 | 국방과학연구소 | Fiber-optic gyroscopes, conpensation method of transiert output error due to tenperature perturbation for the fiber-optic gyroscopes, and calculation method of the conpensation value for the fiber-optic gyroscopes |
| CN106403994A (en) * | 2016-08-23 | 2017-02-15 | 中国航空工业集团公司西安飞行自动控制研究所 | Device and method for automatically debugging parameters of closed-loop fiber-optic gyroscope |
| CN107702730A (en) * | 2017-09-22 | 2018-02-16 | 苏州光环科技有限公司 | Method of testing, device, storage medium and the computer equipment of optical fibre gyro |
| CN107869997A (en) * | 2016-09-27 | 2018-04-03 | 北京计算机技术及应用研究所 | Light path commissioning device for optical fibre gyro |
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148714A (en) * | 1984-08-17 | 1986-03-10 | Tech Res & Dev Inst Of Japan Def Agency | Drift correction system of optical gyro |
| JPH06265360A (en) * | 1993-03-11 | 1994-09-20 | Hitachi Ltd | Optical-fiber gyro and its detection-signal correction method |
| CN101408427A (en) * | 2008-11-19 | 2009-04-15 | 中国航天时代电子公司 | Distributed layer-dividing grade temperature error compensating method of optical fiber gyroscope |
| CN101750058A (en) * | 2008-12-09 | 2010-06-23 | 姜恩颖 | Optical fiber gyroscope with centre wavelength monitoring and regulating function |
| RU2482450C1 (en) * | 2011-12-16 | 2013-05-20 | Федеральное государственное унитарное предприятие "Центр эксплуатации объектов наземной космической инфраструктуры" (ФГУП "ЦЭНКИ") | Apparatus for testing electronic unit of fibre-optic gyroscope |
| KR20130107979A (en) * | 2012-03-23 | 2013-10-02 | 국방과학연구소 | Fiber-optic gyroscopes, conpensation method of transiert output error due to tenperature perturbation for the fiber-optic gyroscopes, and calculation method of the conpensation value for the fiber-optic gyroscopes |
| CN102759366A (en) * | 2012-07-11 | 2012-10-31 | 北京理工大学 | Detection device of optical fiber gyroscope optical module |
| CN106403994A (en) * | 2016-08-23 | 2017-02-15 | 中国航空工业集团公司西安飞行自动控制研究所 | Device and method for automatically debugging parameters of closed-loop fiber-optic gyroscope |
| CN107869997A (en) * | 2016-09-27 | 2018-04-03 | 北京计算机技术及应用研究所 | Light path commissioning device for optical fibre gyro |
| CN107702730A (en) * | 2017-09-22 | 2018-02-16 | 苏州光环科技有限公司 | Method of testing, device, storage medium and the computer equipment of optical fibre gyro |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7912375B2 (en) | Optical transceiver | |
| EP1470522A2 (en) | Laser optics integrated control system and method of operation | |
| CN102299746B (en) | Small from-factor pluggable (SFP) module with low costs and high precision digit diagnosis function | |
| JP2020088522A (en) | Optical transceiver | |
| CN104269737A (en) | Optical module as well as debugging system and debugging method thereof | |
| CN202172408U (en) | Low cost SFP module with high-precision digital diagnosis function | |
| CN105227243A (en) | A kind of circuit, chip and optical module controlling extinction ratio | |
| CN112710332B (en) | Output power calibration method and system for optical fiber gyroscope | |
| CN112710332A (en) | Method and system for calibrating output power of optical fiber gyroscope | |
| CN102215063A (en) | Core parameter debugging method of long-reach 10 gigabit small form factor pluggable (XFP) module based on electro-absorption modulated laser (EML) | |
| CN108449142A (en) | Optical module and its APD voltage adjusting methods | |
| US20030174746A1 (en) | System for controlling power, wavelength and extinction ratio in optical sources, and computer program product therefor | |
| CN112710331B (en) | Method and system for initializing and calibrating optical fiber gyroscope | |
| CN101297232B (en) | Optical modulator | |
| WO2018058805A1 (en) | High-speed device based on spectral accurate matching technology | |
| CN112710331A (en) | Optical fiber gyroscope initialization calibration method and system | |
| CN107645120A (en) | A kind of eye pattern compensates optical module and its eye pattern automatic compensating method automatically | |
| CN112710329A (en) | Self-checking method and system for optical fiber gyroscope | |
| CN111835429B (en) | Optical module, method for correcting transmitting optical power of optical module and controller | |
| US7505684B2 (en) | Transceiver boot loader | |
| CN210327581U (en) | High-precision optical attenuator calibration system | |
| JP2021108473A (en) | Pluggable optical module, optical transceiver and control method for optical transmission system | |
| CN103185927B (en) | Optical fiber transmission module | |
| CN112564815B (en) | Circuit, method, equipment and storage medium for compensating transmitting power of optical module | |
| CN218383375U (en) | On-chip integrated optical power stabilizer and photonic integrated chip |
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 | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: Research and Development Office Building, No.1 Tianyi Technology Independent Entrepreneurship Park, No. 39 Jiankang Avenue, Tianyuan District, Zhuzhou City, Hunan Province, 2007 Applicant after: Zhuzhou fisrock Photoelectric Technology Co.,Ltd. Address before: 420007 Building 1, group E, China Power Valley phase 3.1, no.899, Xianyue Ring Road, Tianyuan District, Zhuzhou City, Hunan Province Applicant before: ZHUZHOU PHASE-LOCK PHOTOELECTRIC TECHNOLOGY CO.,LTD. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant |