CN107631859B - Testing method and testing device suitable for optical fiber interface isolator assembly - Google Patents
Testing method and testing device suitable for optical fiber interface isolator assembly Download PDFInfo
- Publication number
- CN107631859B CN107631859B CN201710788866.7A CN201710788866A CN107631859B CN 107631859 B CN107631859 B CN 107631859B CN 201710788866 A CN201710788866 A CN 201710788866A CN 107631859 B CN107631859 B CN 107631859B
- Authority
- CN
- China
- Prior art keywords
- optical
- return loss
- isolator assembly
- loss tester
- optical fiber
- 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.)
- Active
Links
Images
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention discloses a testing method and a testing device suitable for an optical fiber interface isolator assembly, wherein the method comprises the following steps: connecting the APC end of the optical fiber jumper with the light source output end on the optical return loss tester, connecting the LC end of the optical fiber jumper with the isolator assembly, and starting the optical return loss tester; the optical power output by the output end of the light source is reset to zero, the isolator assembly is connected to a first magnetic ring on the optical return loss tester, and the optical return loss tester automatically calculates and displays an isolation value; and replacing the first magnetic ring with a second magnetic ring, connecting the isolator assembly to the second magnetic ring, and automatically calculating and displaying the insertion loss value by the optical return loss tester. According to the invention, the isolation value and the insertion loss value of the isolator assembly can be tested by only using one optical return loss tester and adding two magnetic rings with opposite polarities, so that the performance of the isolator assembly is accurately tested, the complexity of the test is greatly simplified, and the test efficiency is improved.
Description
Technical Field
The invention relates to the technical field of mobile terminals, in particular to a test method and a test device suitable for an optical fiber interface isolator assembly.
Background
Isolator assemblies are key components in high speed fiber optic communication systems, fiber optic amplifiers, optical sensing systems, and various high precision optical test equipment. The manufacturer and each unit of use of the isolator assembly therefore needs to accurately test the performance of the isolator assembly.
In the prior art, the insertion loss value is basically calculated by coupling optical power, and a standard laser transmitter is mainly adopted to drive light with certain current and wavelength to pass through an isolator assembly, then the maximum optical power is coupled out, and the insertion loss value of the isolator assembly is calculated by a software conversion mode. However, the insertion loss value of the isolator assembly is tested in a mode, the efficiency is low, the manufacturing cost is high, the number of times of inserting and pulling the jumper wire on the end face of the isolator assembly in a coupling test is large, and the end face of the isolator assembly is damaged and scrapped easily. In the prior art, the method for testing the isolation value of the isolator assembly is not mature, the isolator assembly is basically connected into a light path in the positive and negative directions for testing, the testing method is complicated, and the manufacturing period of the product is prolonged.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention provides a testing method and a testing apparatus for an optical fiber interface isolator assembly, aiming at solving the problems of complex operation and low efficiency in testing isolation values and insertion loss values of the isolator assembly in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method of testing a fiber optic interface isolator assembly, wherein the method comprises:
step A, connecting an APC end of the optical fiber jumper with a light source output end on an optical return loss tester, connecting an LC end of the optical fiber jumper with an isolator assembly, and starting the optical return loss tester;
b, enabling the optical power output by the light source output end to return to zero, connecting the isolator assembly to a first magnetic ring which is pre-installed on a power receiving end of the optical return loss tester and used for manufacturing a magnetic field environment, and automatically calculating and displaying the isolation value of the isolator assembly by the optical return loss tester;
and step C, replacing the first magnetic ring on the power receiving end with a second magnetic ring with opposite polarity, connecting the isolator assembly to the second magnetic ring, and automatically calculating and displaying the insertion loss value of the isolator assembly by the optical return loss tester.
The testing method suitable for the optical fiber interface isolator assembly is characterized in that the magnetic fields generated by the first magnetic ring and the second magnetic ring are equal in size and opposite in direction, and the magnetic fields generated by the first magnetic ring and the second magnetic ring are both larger than or equal to 3000 gauss.
The testing method suitable for the optical fiber interface isolator assembly is characterized in that the model of the optical return loss tester is A19508C.
The testing method for the optical fiber interface isolator assembly is characterized in that the step a further includes:
and S, performing point inspection on the optical power output by the light source output end in advance.
The testing method suitable for the optical fiber interface isolator assembly includes the following steps:
step S1, connecting the APC end of the optical fiber jumper to the light source output end of the optical return loss tester, and connecting the LC end of the optical fiber jumper to the power receiving end of the optical return loss tester;
step S2, starting the optical return loss tester, transmitting light through the optical fiber jumper for optical fiber transmission, and displaying the output optical power on the optical return loss tester;
and step S3, judging whether the optical fiber jumper and the optical return loss tester work normally according to the output optical power.
The testing method suitable for the optical fiber interface isolator assembly, wherein the step S3 specifically includes:
step S31, when the output optical power is in the preset range, the optical fiber jumper and the optical return loss tester are indicated to work normally, and step A is executed;
and step S32, when the output optical power is not in the preset range, connecting the optical fiber jumper with the optical return loss tester again and performing point inspection again.
The testing method suitable for the optical fiber interface isolator assembly comprises the following specific steps:
step A1, connecting the APC end of the optical fiber jumper to the light source output end of the optical return loss tester in advance, and connecting the LC end of the optical fiber jumper to the isolator assembly;
step A2, starting the optical return loss tester, wherein the light source output end of the optical return loss tester outputs light;
step A3, light enters the optical fiber jumper from the APC end of the optical fiber jumper and enters the isolator assembly through the LC end of the optical fiber jumper.
The testing method suitable for the optical fiber interface isolator assembly comprises the following specific steps:
step B1, adjusting parameters of the optical return loss tester, and adjusting the output optical power to 0dB output;
step B2, mounting the first magnetic ring on a power receiving end of the optical return loss tester in advance, and connecting the isolator assembly to the first magnetic ring; the first magnetic ring is used for preventing the light from passing through the isolator assembly;
and step B3, the optical return loss tester automatically calculates the isolation value of the isolator assembly and displays the isolation value.
The testing method suitable for the optical fiber interface isolator assembly comprises the following specific steps:
step C1, replacing the first magnetic loop on the power receiving end with the second magnetic loop;
step C2, connecting the isolator assembly to the second magnetic ring; the second magnetic ring is used for enabling the light to pass through the isolator assembly;
and step C3, the optical return loss tester automatically calculates the insertion loss value of the isolator assembly and displays the insertion loss value.
The testing device suitable for the testing method of the optical fiber interface isolator assembly comprises the following steps: the optical fiber module comprises an optical return loss tester, a light wire jumper and an isolator assembly; the APC end of the optical fiber jumper is connected with the light source output end on the optical return loss tester, and the LC end of the optical fiber jumper is connected with the isolator assembly;
the model of the optical return loss tester is A19508C optical return loss tester;
the optical return loss tester comprises: the device comprises a light source output end, a power receiving end, an automatic calculation module and a display screen;
the isolator assembly includes: the polarization analyzer comprises a polarization polarizer, a Faraday rotation sheet and a polarization analyzer;
the testing device adopts any one of the testing methods suitable for the optical fiber interface isolator assembly to carry out testing.
The invention has the beneficial effects that: according to the invention, the isolation value and the insertion loss value of the isolator assembly can be tested by only using one optical return loss tester and adding two magnetic rings with opposite polarities, so that the performance of the isolator assembly is accurately tested, the complexity of the test is greatly simplified, and the test efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method of testing a fiber optic interface isolator assembly in accordance with the present invention.
Fig. 2 is a functional schematic diagram of a testing method of the present invention suitable for use with a fiber optic interface isolator assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The isolator assembly is a passive optical device only allowing one-way light to pass through, the working principle of the isolator assembly is based on the non-reciprocity of Faraday rotation, for signal light incident in the forward direction, the signal light becomes linearly polarized light after passing through a polarization polarizer, a Faraday rotation magnetic medium and an external magnetic field together enable the polarization direction of the signal light to rotate to the right by 45 degrees, and the signal light just passes through a polarization analyzer which is arranged at 45 degrees with the polarization polarizer with low loss. For the reverse light, when the linearly polarized light of the polarization analyzer passes through the Faraday gyromagnetic medium, the deflection direction also rotates by 45 degrees to the right, so that the polarization direction of the reverse light is orthogonal to the polarization polarizer direction and cannot pass through the polarization polarizer, and the transmission of the reflected light is completely blocked.
Referring to fig. 1, fig. 1 is a flow chart of a testing method for a fiber optic interface isolator assembly according to the present invention. The testing method suitable for the optical fiber interface isolator assembly comprises the following steps of:
and S100, connecting the APC end of the optical fiber jumper with a light source output end on the optical return loss tester, connecting the LC end of the optical fiber jumper with an isolator assembly, and starting the optical return loss tester.
Preferably, the step S100 specifically includes:
step S101, connecting an APC (angled Pressed connector) end of the optical fiber jumper wire to a light source output end on the optical return loss tester in advance, and connecting an LC end of the optical fiber jumper wire to the isolator assembly;
step S102, starting the optical return loss tester, wherein the light source output end of the optical return loss tester outputs light;
step S103, light enters the optical fiber patch cord from the APC end of the optical fiber patch cord and enters the isolator assembly through the LC end of the optical fiber patch cord.
In specific implementation, as shown in fig. 2, fig. 2 is a functional schematic diagram of a testing method for a fiber interface isolator assembly according to the present invention. The present invention uses an optical return loss tester 10 to test the performance 30 of the isolator assembly. The optical return loss tester 10 is a model a19508C optical return loss tester. Before testing the isolator assembly 30, the optical power output from the light source output 101 of the optical return loss tester 10 needs to be checked in advance. Specifically, the APC end of the optical fiber jumper 20 is first connected to the light source output end 101 of the optical return loss tester 10, and the LC end of the optical fiber jumper 20 is connected to the power receiving end 102 of the optical return loss tester 10, so as to start the optical return loss tester 10. The light is transmitted through the optical fiber jumper 20, and the output optical power is displayed on the display screen 103 of the optical return loss tester 10; the user can judge whether the optical return loss tester 10 and the optical fiber jumper 20 work normally according to the output optical power.
Preferably, when the output optical power is within the preset range, it indicates that the optical return loss tester 10 and the optical fiber jumper 20 are working normally, and the point inspection is normal, and the testing step is continued. If the output optical power is not within the preset range, the optical fiber jumper 20 is connected with the optical return loss tester 10 again, and the point inspection is performed again until the point inspection is normal. According to the invention, the isolator assembly 30 is tested by adopting the optical return loss tester 10 with the model number of A19508C, the cost of the optical return loss tester 10 is lower, the testing method is simple, and the testing efficiency of the isolator assembly is effectively improved.
Further, after the point inspection is completed, the LC end of the optical fiber jumper 20 is connected to the isolator assembly 20 to be tested, the optical return loss tester 10 is started, the light source output end 101 of the optical return loss tester 10 outputs light, and the light enters the optical fiber jumper 20 from the APC end of the optical fiber jumper 20 and enters the isolator assembly 30 through the LC end of the optical fiber jumper 20. The isolator assembly includes: a polarization polarizer, a Faraday rotator and a polarization analyzer.
And S200, enabling the optical power output by the light source output end to return to zero, connecting the isolator assembly to a first magnetic ring which is pre-installed on a power receiving end of the optical return loss tester and used for manufacturing a magnetic field environment, and automatically calculating and displaying the isolation value of the isolator assembly by the optical return loss tester.
Preferably, the step S200 specifically includes:
step S201, adjusting parameters of the optical return loss tester, and adjusting output optical power to 0dB output;
step S202, mounting the first magnetic ring on a power receiving end of the optical return loss tester in advance, and connecting the isolator assembly to the first magnetic ring; the first magnetic ring is used for preventing the light from passing through the isolator assembly;
step S203, the optical return loss tester automatically calculates the isolation value of the isolator assembly and displays the value.
In specific implementation, the isolator component adopts the working principle of utilizing the Faraday effect of the magneto-optical crystal, namely, the rotating direction is changed according to the direction of a magnetic field, for example, light enters from the S-pole direction, the Faraday direction becomes the left-handed light direction, the left-handed light direction is superposed with the polarization direction of the polarization analyzer, and the light just passes through the polarization analyzer; if the N pole enters light in the opposite direction, the Faraday direction is the left-handed light direction, and the polarization direction of the Faraday direction is vertical to the polarization direction of the polarization polarizer by 90 degrees, so that the light cannot pass through and is completely isolated and blocked; that is, forward light can pass through the isolator, and reverse light is isolated.
In order to test the isolation value of the isolator assembly 30, a first magnetic ring is mounted on the power receiving end 102 of the optical return loss tester 10 in advance, and the first magnetic ring is used for preventing the light from passing through the isolator assembly 30. Preferably, the magnetic field intensity generated by the first magnetic ring is greater than or equal to 3000 gauss. Then, through a "zero" button on the optical return loss tester 10, parameters of the optical return loss tester 10 are adjusted, the optical power output by the light source output end 101 is set to zero, and the output optical power is adjusted to 0dB output. Thus, with the addition of the first female ring, which creates a magnetic field, light equivalent to 00dB passes from the direction connecting the isolator assembly 30 to the first magnetic ring, and when 0dB of light is used to pass through the polarization analyzer from the opposite direction into the isolator assembly 30, the light is isolated. The optical return loss tester 10 automatically calculates and displays the isolation value of the isolator assembly 30.
And step S300, replacing the first magnetic ring on the power receiving end with a second magnetic ring with opposite polarity, connecting the isolator assembly to the second magnetic ring, and automatically calculating and displaying the insertion loss value of the isolator assembly by the optical return loss tester.
The step S300 specifically includes:
step S301, the first magnetic ring on the power receiving end is replaced with the second magnetic ring;
step S302, connecting the isolator assembly to the second magnetic ring; the second magnetic ring is used for enabling the light to pass through the isolator assembly;
and step S303, the optical return loss tester automatically calculates the insertion loss value of the isolator assembly and displays the insertion loss value.
In specific implementation, after the isolation value of the isolator assembly 30 is tested, the first magnetic ring on the power receiving end 102 is replaced with the second magnetic ring; connecting the isolator assembly 30 to the second magnetic ring; the second magnetic ring is used to pass the light through the isolator assembly 30. The magnetic field intensity generated by the second magnetic ring is equal to that generated by the first magnetic ring, the directions of the magnetic field intensity generated by the second magnetic ring and the first magnetic ring are opposite, and the magnetic field intensity generated by the second magnetic ring is also larger than or equal to 3000 gauss. Because the size of the added second magnetic ring is different from the direction of the first magnetic ring, light enters from the polarization analyzer and is just overlapped with the polarization direction of the polarization polarizer, so that the light can smoothly pass through the isolator assembly 30. The optical return loss tester 10 automatically calculates the insertion loss value of the isolator assembly 30 and displays the insertion loss value on the display screen 103. According to the invention, the isolation value and the insertion loss value of the isolator assembly can be tested by only using one optical return loss tester and adding the magnetic rings with opposite polarities, so that the performance of the isolator assembly is accurately tested, the complexity of the test is greatly simplified, and the test efficiency is improved.
Based on the above embodiment, the present invention further discloses a testing apparatus suitable for the testing method of the optical fiber interface isolator assembly based on any one of the above embodiments, as shown in fig. 2. Wherein, include: an optical return loss tester 10, an optical jumper 20, and an isolator assembly 30; the APC end of the optical fiber jumper 20 is connected to the light source output end 101 of the optical return loss tester 10, and the LC end of the optical fiber jumper 20 is connected to the isolator assembly 30;
the model of the optical return loss tester 10 is A19508C optical return loss tester;
the optical return loss tester 10 includes: the system comprises a light source output end 101, a power receiving end 102, an automatic calculation module and a display screen 104;
the isolator assembly 30 includes: a polarization polarizer, a Faraday rotator and a polarization analyzer. The testing device is used for testing the testing method suitable for the optical fiber interface isolator assembly in any one of the above embodiments.
In summary, the present invention provides a testing method and a testing apparatus for an optical fiber interface isolator assembly, the method includes: connecting the APC end of the optical fiber jumper with the light source output end on the optical return loss tester, connecting the LC end of the optical fiber jumper with the isolator assembly, and starting the optical return loss tester; the optical power output by the light source output end is reset to zero, the isolator assembly is connected to a first magnetic ring which is pre-installed on a power receiving end on the optical return loss tester and used for manufacturing a magnetic field environment, and the optical return loss tester automatically calculates and displays the isolation value of the isolator assembly; and replacing the first magnetic ring on the power receiving end with a second magnetic ring with opposite polarity, connecting the isolator assembly to the second magnetic ring, and automatically calculating and displaying the insertion loss value of the isolator assembly by the optical return loss tester. According to the invention, the isolation value and the insertion loss value of the isolator assembly can be tested by only using one optical return loss tester and adding two magnetic rings with opposite polarities, so that the performance of the isolator assembly is accurately tested, the complexity of the test is greatly simplified, and the test efficiency is improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A method of testing a fiber optic interface isolator assembly, comprising:
step A, connecting an APC end of the optical fiber jumper with a light source output end on an optical return loss tester, connecting an LC end of the optical fiber jumper with an isolator assembly, and starting the optical return loss tester;
b, enabling the optical power output by the light source output end to return to zero, connecting the isolator assembly to a first magnetic ring which is pre-installed on a power receiving end of the optical return loss tester and used for manufacturing a magnetic field environment, and automatically calculating and displaying the isolation value of the isolator assembly by the optical return loss tester;
step C, replacing a first magnetic ring on the power receiving end with a second magnetic ring with opposite polarity, connecting the isolator assembly to the second magnetic ring, and automatically calculating and displaying the insertion loss value of the isolator assembly by the optical return loss tester;
wherein, the step A specifically comprises:
step A1, connecting the APC end of the optical fiber jumper to the light source output end of the optical return loss tester in advance, and connecting the LC end of the optical fiber jumper to the isolator assembly;
step A2, starting the optical return loss tester, wherein the light source output end of the optical return loss tester outputs light;
step A3, light enters the optical fiber jumper from the APC end of the optical fiber jumper and enters the isolator assembly through the LC end of the optical fiber jumper;
the magnetic fields generated by the first magnetic ring and the second magnetic ring are equal in size and opposite in direction, and the magnetic fields generated by the first magnetic ring and the second magnetic ring are both larger than or equal to 3000 gauss;
the step A further comprises the following steps: the polarizing polarizer in the isolator assembly was previously placed at 45 °.
2. The method of claim 1, wherein the optical return loss tester is a model a19508C optical return loss tester.
3. The method for testing a fiber optic interface isolator assembly according to claim 1, wherein step a is preceded by the step of:
and S, performing point inspection on the optical power output by the light source output end in advance.
4. The method according to claim 3, wherein the step S specifically includes:
step S1, connecting the APC end of the optical fiber jumper to the light source output end of the optical return loss tester, and connecting the LC end of the optical fiber jumper to the power receiving end of the optical return loss tester;
step S2, starting the optical return loss tester, transmitting light through the optical fiber jumper for optical fiber transmission, and displaying the output optical power on the optical return loss tester;
and step S3, judging whether the optical fiber jumper and the optical return loss tester work normally according to the output optical power.
5. The method for testing the fiber optic interface isolator assembly according to claim 4, wherein the step S3 specifically includes:
step S31, when the output optical power is in the preset range, the optical fiber jumper and the optical return loss tester are indicated to work normally, and step A is executed;
and step S32, when the output optical power is not in the preset range, connecting the optical fiber jumper with the optical return loss tester again and performing point inspection again.
6. The method according to claim 1, wherein step B specifically includes:
step B1, adjusting parameters of the optical return loss tester, and adjusting the output optical power to 0dB output;
step B2, mounting the first magnetic ring on a power receiving end of the optical return loss tester in advance, and connecting the isolator assembly to the first magnetic ring; the first magnetic ring is used for preventing the light from passing through the isolator assembly;
and step B3, the optical return loss tester automatically calculates the isolation value of the isolator assembly and displays the isolation value.
7. The method according to claim 1, wherein the step C specifically includes:
step C1, replacing the first magnetic loop on the power receiving end with the second magnetic loop;
step C2, connecting the isolator assembly to the second magnetic ring; the second magnetic ring is used for enabling the light to pass through the isolator assembly;
and step C3, the optical return loss tester automatically calculates the insertion loss value of the isolator assembly and displays the insertion loss value.
8. A testing apparatus based on the method for testing an optical fiber interface isolator assembly according to any one of claims 1 to 7, comprising: the optical fiber module comprises an optical return loss tester, a light wire jumper and an isolator assembly; the APC end of the optical fiber jumper is connected with the light source output end on the optical return loss tester, and the LC end of the optical fiber jumper is connected with the isolator assembly;
the model of the optical return loss tester is A19508C optical return loss tester; the optical return loss tester comprises: the device comprises a light source output end, a power receiving end, an automatic calculation module and a display screen;
the isolator assembly includes: the polarization analyzer comprises a polarization polarizer, a Faraday rotation sheet and a polarization analyzer;
the testing device is used for testing the optical fiber interface isolator assembly according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788866.7A CN107631859B (en) | 2017-09-05 | 2017-09-05 | Testing method and testing device suitable for optical fiber interface isolator assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788866.7A CN107631859B (en) | 2017-09-05 | 2017-09-05 | Testing method and testing device suitable for optical fiber interface isolator assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107631859A CN107631859A (en) | 2018-01-26 |
| CN107631859B true CN107631859B (en) | 2020-03-24 |
Family
ID=61101070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710788866.7A Active CN107631859B (en) | 2017-09-05 | 2017-09-05 | Testing method and testing device suitable for optical fiber interface isolator assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631859B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631804B (en) * | 2019-08-21 | 2022-06-07 | 大族激光科技产业集团股份有限公司 | Automatic testing method and device for optical fiber laser |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004093153A (en) * | 2002-08-29 | 2004-03-25 | Kyocera Corp | Optical loss measuring method for optical fiber pigtail with optical isolator |
| CN1702441A (en) * | 2004-05-24 | 2005-11-30 | 昂纳信息技术（深圳）有限公司 | Apparatus and method for testing fiber optic insulator |
| CN103368046B (en) * | 2013-07-16 | 2015-09-16 | 中国电子科技集团公司第三十四研究所 | Linearly polarized laser output high-power fiber amplifier and output control method |
| CN106969905A (en) * | 2017-03-31 | 2017-07-21 | 深圳市芯思杰智能物联网技术有限公司 | Optoisolator test system |
-
2017
- 2017-09-05 CN CN201710788866.7A patent/CN107631859B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107631859A (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6512775B2 (en) | Optical fiber testing using OTDR equipment | |
| CN202798726U (en) | CFP optical module tester | |
| CN103645537B (en) | Based on device and the welding process again thereof of polarization maintaining optical fibre end face dead axle | |
| CN109059962B (en) | Optical path performance test system for optical fiber gyroscope | |
| US20160349145A1 (en) | Mpo switch, fiber test device, system and kit | |
| CN107631859B (en) | Testing method and testing device suitable for optical fiber interface isolator assembly | |
| CN205067061U (en) | Multi -functional fibre loss tester | |
| CN101968507A (en) | Optical fiber voltage sensor and adjustment method thereof | |
| CN106849638B (en) | A kind of power circuit and liquid crystal display | |
| CN109655231B (en) | Method and system for detecting working axis of 2 × 2 polarization maintaining optical fiber beam splitter | |
| US8594500B2 (en) | Connection loss scheme for fiber connections in optical communication system | |
| CN109309527B (en) | Optical power measuring device | |
| CN101141220A (en) | Optical power display and regulation device | |
| CN211206844U (en) | Integrated field optical fiber terminating handheld equipment | |
| CN105717374B (en) | The exceeded problem source localization method of radiation dispersion | |
| CN204465535U (en) | A kind of mobile portable light letter disaster tolerance device | |
| CN101644794B (en) | Monitoring method of optical coupler splitting ratio | |
| CN201965220U (en) | Space magnetic field detector | |
| CN204286753U (en) | Far-end speech optical cable identifier | |
| CN110838873B (en) | Test method based on MTP pretermination optical cable | |
| CN104410448A (en) | Enhanced auxiliary tail fiber device for assisting OTDR (Optical Time Domain Reflectometer) | |
| CN209280275U (en) | A kind of test device for MT connector | |
| CN113625477A (en) | Optical isolator | |
| CN104202208A (en) | A test fixture for a loopback function of a communication terminal | |
| CN210380853U (en) | Optical fiber weak signal tester |
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 |