CN114189280B - Multi-wavelength banded light testing method for optical time domain reflectometer - Google Patents
Multi-wavelength banded light testing method for optical time domain reflectometer Download PDFInfo
- Publication number
- CN114189280B CN114189280B CN202111487202.XA CN202111487202A CN114189280B CN 114189280 B CN114189280 B CN 114189280B CN 202111487202 A CN202111487202 A CN 202111487202A CN 114189280 B CN114189280 B CN 114189280B
- Authority
- CN
- China
- Prior art keywords
- optical
- wavelength
- optical fiber
- tested
- light
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a method for testing multi-wavelength banded light of an optical time domain reflectometer, which belongs to the technical field of optical fiber communication, wherein under the control of a data processing unit, tested optical fibers are respectively connected into different test branches through a first optical switch unit, and filters with different wavelength characteristics are arranged in the different test branches; detecting whether light exists in the detected optical fiber or not through a photoelectric detector; if the light exists, the pulse laser does not emit light, and the data processing unit marks the light signal in the tested optical fiber as the light with the wavelength of the filter; if no optical signal is detected, the optical power emitted by the pulse laser is emitted into the optical fiber to be detected through the optical splitter or the circulator, the photoelectric detector collects the optical signal returned by the optical fiber Rayleigh scattering and gives the optical signal to the data processing unit for processing, and therefore the physical characteristics of the optical fiber to be detected are detected at the wavelength. The invention not only realizes the test of the tested optical fiber with light; and can identify whether there is light in the measured optical fiber and the wavelength of the optical signal.
Description
Technical Field
The invention belongs to the technical field of optical fiber communication, and particularly relates to a multi-wavelength banded optical testing method of an optical time domain reflectometer.
Background
An optical time-domain reflectometer (OTDR) may provide an internal view of the fiber and may be capable of calculating fiber length, attenuation values, breaking points, total return loss and fusion points, connection points, and total loss. The OTDR sends short pulses of light into the fiber. Light scattering occurs in the optical fiber due to interruption factors such as connectors, fusion points, bends, faults, etc. The OTDR will then detect and analyze the backscattered signal. The signal strength is measured for a particular time interval and used to represent event characteristics.
The optical time domain reflectometer mainly relates to the field of optical fiber communication, has higher use frequency and is mainly used for construction, opening and maintenance of an optical network in the field of optical fiber communication. The wavelength selection condition of the optical time domain reflectometer is generally the same as the wavelength running in the optical communication network, and the optical signal cannot be carried by the optical fiber to be tested in the test process. In the actual process, the dual-wavelength OTDR without the filtering function is generally adopted for opening and maintenance, and at the moment, no optical signal can exist in the tested optical fiber. If the optical test is carried out, the wavelength of the transmitted light in the optical fiber network is not known, and the OTDR with a single wavelength band filtering function of 1625nm or 1650nm is generally selected for the test; knowing the wavelength in the optical fiber network, other single wavelength OTDR tests with filtering function are generally selected, such as transmitting 1310nm light in the optical network, and OTDR selects 1550nm band filtering function for testing.
However, with the development of FTTH (Fibre To The Home, fiber to the home), GPON or EPON is applied on a large scale, the downstream signal in the optical fiber network is 1550nm or 1490nm wavelength, and the upstream signal is 1310nm optical signal, and at this time, only the OTDR with wavelength of 1625nm or 1650nm can be maintained.
The existing OTDR has the function of filtering test with only a single wavelength, and if the wavelength is unknown in the maintained optical network, the filtering test OTDR with 1310nm of the single wavelength and 1550nm of the single wavelength cannot be used, and the OTDR with 1625nm wavelength can be used, but the cost is too high.
Therefore, in the field of optical fiber communication technology, there is still a need for research and improvement on optical time domain reflectometry, which is a research hotspot and an important point in the field of optical fiber communication technology at present, and is more a starting point for the completion of the present invention.
Disclosure of Invention
Therefore, the technical problems to be solved by the invention are as follows: the method for testing the multi-wavelength band light of the optical time domain reflectometer not only can test the physical characteristics of the tested optical fiber with the light, but also has the multi-wavelength testing function.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method for multi-wavelength optical testing of the optical time domain reflectometer comprises N testing branches and a first optical switch unit for connecting an optical fiber to be tested into different testing branches, wherein N is a positive integer greater than or equal to 2, the testing branches comprise a filter and an optical splitter or a circulator which are connected together, the passband characteristic of the filter on the same testing branch is the same as the characteristic of the optical splitter or the circulator, one port of the optical splitter or the circulator is connected with a pulse laser, the wavelength characteristic of the filter on the same testing branch is consistent with the wavelength characteristic of the pulse laser, the wavelength characteristics of the filter on different testing branches are different, the other port of the optical splitter or the circulator is connected with an optical fiber wavelength division multiplexer unit or a second optical switch unit for converting the light of the different testing branches into a photoelectric detector, and the first optical switch unit, the pulse laser, the photoelectric detector and the optical fiber wavelength division multiplexer unit or the second optical switch unit are all connected with a data processing unit;
during testing, the data processing unit sends out a control command to control the first optical switch unit to connect the tested optical fiber into a filter of a testing branch circuit, and meanwhile, the data processing unit detects whether light exists in the tested optical fiber through the photoelectric detector, if so, the data processing unit controls the pulse laser on the testing branch circuit not to emit light, and the testing branch circuit does not test; if the photoelectric detector does not detect the optical signal, the data processing unit controls the pulse laser on the test branch to emit light, and the photoelectric detector collects the optical signal returned by the optical fiber Rayleigh scattering and sends the optical signal to the data processing unit for processing, so that the physical characteristics of the tested optical fiber detected by the pulse laser on the test branch at the wavelength are achieved;
and then the data processing unit controls the first optical switch unit to connect the tested optical fiber into the filter of the next test branch circuit, and continues testing until all the test branch circuits are tested.
When the first optical switch unit connects the detected optical fiber into the filter of one test branch, the data processing unit detects the optical signal in the detected optical fiber through the photoelectric detector, the wavelength of the light transmitted in the detected optical fiber is proved to be the wavelength of the filter, and the data processing unit marks the optical signal in the detected optical fiber as the light with the wavelength of the filter.
As an improvement, the first optical switch unit includes a single or a plurality of optical switches 1*2.
As an improvement, the optical fiber wavelength division multiplexer unit comprises a single or a plurality of optical fiber wavelength division multiplexers; the second optical switching unit includes optical switches of single or multiple 1*2.
After the technical scheme is adopted, the invention has the beneficial effects that:
under the control of the data processing unit, the optical fibers to be tested are respectively connected into different test branches through the first optical switch unit, and filters with different wavelength characteristics are arranged in the different test branches, so that each test branch can only pass the light with the wavelength, and the light with other wavelengths is filtered; when the tested optical fiber is connected into a testing branch, detecting whether light exists in the tested optical fiber or not through a photoelectric detector; if light exists, the data processing unit controls the pulse laser on the test branch to emit no light, and the test branch does not test; if the photoelectric detector does not detect the optical signal, the optical power emitted by the pulse laser is emitted into the optical fiber to be detected through the optical splitter or the circulator, and finally the optical power is collected into the photoelectric detector through the optical fiber wavelength division multiplexer unit or the second optical switch unit, and the photoelectric detector gives the optical signal returned by the Rayleigh scattering of the collected optical fiber to the data processing unit for processing, so that the pulse laser on the test branch detects the physical characteristics of the optical fiber to be detected at the wavelength, and whether the optical fiber to be detected has light can be identified; after all the test branches are tested, the multi-wavelength detection of the tested optical fiber is realized.
When the first optical switch unit connects the tested optical fiber into the filter of one test branch, the data processing unit detects the optical signal in the tested optical fiber through the photoelectric detector, the wavelength of the optical signal transmitted in the tested optical fiber is proved to be the wavelength of the filter, and the data processing unit marks the optical signal in the tested optical fiber as the light with the wavelength of the filter, so that the wavelength of the optical signal in the tested optical fiber can be identified.
In conclusion, the method for testing the multi-wavelength band light of the optical time domain reflectometer not only realizes the physical characteristics of the tested optical fiber for testing the band light, but also has the multi-wavelength testing function; and can identify whether there is light in the measured optical fiber and the wavelength of the optical signal in the measured optical fiber.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the scope of the invention.
FIG. 1 is a block diagram of an optical time domain reflectometer with multi-wavelength band light testing in an embodiment of the present invention;
FIG. 2 is a flow chart of a testing method of each testing branch in a multi-wavelength banded optical testing method of an optical time domain reflectometer according to an embodiment of the present invention;
FIG. 3 is a block diagram of an optical time domain reflectometer with dual wavelength band optical testing in an embodiment of the present invention;
in the figure: 10. a test branch; 101. a filter; 1011. 1310nm filter; 1012. 1550nm filter; 102. a beam splitter or circulator; 1021. 1310nm optical splitter or 1310nm circulator; 1022. 1550nm beamsplitter or 1550nm circulator; 103. a pulsed laser; 1031. 1310nm pulsed laser; 1032. 1550nm pulsed laser; 20. a first optical switching unit; 30. a photodetector; 40. an optical fiber wavelength division multiplexer unit or a second optical switching unit; 50. and a data processing unit.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A method for multi-wavelength banded optical testing of an optical time domain reflectometer, as shown in fig. 1, the optical time domain reflectometer comprises N test branches 10 and a first optical switch unit 20 for connecting the tested optical fiber into different test branches, wherein N is a positive integer greater than or equal to 2, and preferably, the first optical switch unit 20 comprises a single or a plurality of 1*2 optical switches. The test branch 10 comprises a filter 101 and an optical splitter or circulator 102 connected together, the passband characteristics of the filter 101 on the same test branch are the same as those of the optical splitter or circulator 102, one port of the optical splitter or circulator 102 is connected with a pulse laser 103, the wavelength characteristics of the filter 101 on the same test branch are consistent with those of the pulse laser 103, the wavelength characteristics of the filters 101 on different test branches are different, and the other port of the optical splitter or circulator 102 is connected with a fiber wavelength division multiplexer unit or a second optical switch unit 40 for converting light of different test branches into a photoelectric detector 30, preferably, the fiber wavelength division multiplexer unit comprises a single or a plurality of fiber wavelength division multiplexers WDM; the second optical switch unit includes optical switches of single or multiple 1*2; the first optical switching unit 20, the pulse laser 103, the photodetector 30, and the fiber wavelength division multiplexer unit or the second optical switching unit 40 are all connected to the data processing unit 50.
The beam splitter or circulator 102 is used to inject the light emitted from the pulse laser 103 into the optical fiber to be measured, and to receive the reflected light signal from the optical fiber to be measured.
The function of the optical fiber wavelength division multiplexer unit or the second optical switching unit 40 is to transmit the optical signals on the different test branches to the photodetector 30.
The data processing unit 50 is preferably a processor, and is used for controlling the first optical switch unit 20, detecting whether the optical signal exists in the photodetector 30, controlling the pulse laser 103 to emit the optical pulse, processing the optical signal received by the photodetector 30, and analyzing the optical signal.
In the test, referring to fig. 1 and 2, the data processing unit 50 sends a control command to control the first optical switch unit 20 to connect the tested optical fiber into the filter 101 of one test branch, and meanwhile, the data processing unit 50 detects whether light exists in the tested optical fiber through the photodetector 30, if so, the data processing unit 50 controls the pulse laser 103 on the test branch not to emit light, the test branch does not perform the test, at this time, the wavelength of light transmitted in the tested optical fiber is proved to be the wavelength of the filter, and the data processing unit marks the light signal in the tested optical fiber as the light of the wavelength of the filter; if the photodetector 30 does not detect the optical signal, the data processing unit 50 controls the pulse laser 103 on the test branch to emit light, and the photodetector 30 collects the optical signal returned by the fiber Rayleigh scattering and sends the optical signal to the data processing unit 50 for processing, so that the physical characteristics of the tested fiber are detected by the pulse laser 103 on the test branch at the wavelength; then, the data processing unit 50 controls the first optical switch unit 20 to connect the tested optical fiber into the filter of the next testing branch, and continues testing until all the testing branches are tested.
After the test is completed, the number of the wavelengths contained in the tested optical fiber and the numerical value of the wavelengths are displayed when the analysis result is obtained, and the test result of the test branch without the wavelengths in the tested optical fiber is displayed. If the wavelength of the test branch is covered in the tested optical fiber, only the wavelength value of the tested optical fiber is displayed, and the optical time domain reflectometer with other wavelengths is used for reminding to measure.
Under the control of the data processing unit 50, the optical fibers to be tested are respectively connected into different test branches through the first optical switch unit 20, and filters 101 with different wavelength characteristics are arranged in the different test branches, so that each test branch can only pass the light with the wavelength, and the light with other wavelengths can be filtered; when the tested optical fiber is connected into a testing branch, detecting whether light exists in the tested optical fiber or not through the photoelectric detector 30; if light exists, the data processing unit 50 controls the pulse laser 103 on the test branch to not emit light, the test branch does not perform a test, the wavelength of the light transmitted in the tested optical fiber is proved to be the wavelength of the filter, and the data processing unit 50 marks the light signal in the tested optical fiber as the light of the wavelength of the filter, so that the invention has the functions of identifying whether the light exists in the tested optical fiber and identifying the wavelength of the light signal in the tested optical fiber; if the photoelectric detector 30 does not detect the optical signal, the optical power emitted by the pulse laser 103 is emitted into the optical fiber to be tested through the optical splitter or the circulator 102, and finally is collected into the photoelectric detector 30 through the optical fiber wavelength division multiplexer unit or the second optical switch unit 40, and the photoelectric detector 30 delivers the optical signal returned by the collected optical fiber Rayleigh scattering to the data processing unit 50 for processing, so that the physical characteristics of the optical fiber to be tested detected at the wavelength of the pulse laser on the test branch are achieved; after all the test branches are tested, the multi-wavelength detection of the tested optical fiber is realized.
Since the transmission in most optical fibers is 1310nm or 1550nm light, and the transmission is relatively few, the test is performed with one wavelength 1310nm or 1550nm in the optical fiber to be tested as the transmission wavelength.
A method for dual wavelength banded optical testing of an optical time domain reflectometer, as shown in fig. 3, the optical time domain reflectometer comprises two testing branches and a first optical switch unit 20 for connecting the tested optical fiber into different testing branches, preferably, the first optical switch unit 20 is a single 1*2 optical switch. One of the test branches comprises a 1310nm filter 1011 and a 1310nm optical splitter or 1310nm circulator 1021 connected together, one port of the 1310nm optical splitter or 1310nm circulator 1021 being connected to a 1310nm pulse laser 1031, the other test branch comprises a 1550nm filter 1012 and a 1550nm optical splitter or 1550nm circulator 1022 connected together, one port of the 1550nm optical splitter or 1550nm circulator 1022 being connected to a 1550nm pulse laser 1032, the other port of the 1310nm optical splitter or 1310nm circulator 1021, 1550nm optical splitter or 1550nm circulator 1022 being connected to a fiber wavelength division multiplexer unit or second optical switching unit 40 for converting light of different test branches into a photodetector 30, preferably the fiber wavelength division multiplexer unit comprises a single fiber wavelength division multiplexer WDM; the second optical switch unit includes a single 1*2 optical switch; the first optical switching unit 20, 1310nm pulse laser 1031, 1550nm pulse laser 1032, photodetector 30 and optical fiber wavelength division multiplexer unit or second optical switching unit 40 are all connected to the data processing unit 50.
During testing, the data processing unit 50 sends out a control command to control the first optical switch unit 20 to connect the tested optical fiber into the testing branch of the 1310nm filter 1011, meanwhile, the data processing unit 50 detects whether light exists in the tested optical fiber through the photoelectric detector 30, if so, the data processing unit 50 controls the 1310nm pulse laser 1031 not to emit light, the testing branch does not test, at the moment, the wavelength of light transmitted in the tested optical fiber is 1310nm, and the data processing unit 50 marks the light with 1310nm wavelength as the optical signal in the tested optical fiber; if the photodetector 30 does not detect the optical signal, the data processing unit 50 controls the 1310nm pulse laser 1031 to emit light, and the photodetector 30 collects the optical signal returned by the optical fiber Rayleigh scattering and sends the optical signal to the data processing unit 50 for processing, so as to achieve the physical characteristic of detecting the detected optical fiber at the wavelength of 1310 nm.
Then the data processing unit 50 controls the first optical switch unit 20 to connect the tested optical fiber into the test branch with 1550nm filter, at the same time, the data processing unit 50 detects whether there is light in the tested optical fiber through the photoelectric detector 30, if there is light, the data processing unit 50 controls the 1550nm pulse laser 1032 to not emit light, the test branch does not test, at the moment, the wavelength of light transmitted in the tested optical fiber is 1550nm, the data processing unit 50 marks the light signal in the tested optical fiber as 1550nm wavelength light; if the photodetector 30 does not detect the optical signal, the data processing unit 50 controls the 1550nm pulse laser 1032 to emit light, and the photodetector 30 collects the optical signal returned by the optical fiber Rayleigh scattering and transmits the optical signal to the data processing unit 50 for processing, so as to achieve the physical characteristic of detecting the detected optical fiber at the wavelength of 1550 nm.
It should be noted that if there is both 1310nm and 1550nm light in the detection fiber, the data processing unit will simultaneously display that two wavelengths are detected, the emission of 1310nm pulse laser 1031 and 1550nm pulse laser 1032 will stop, and if the fiber under test is an optical signal of other wavelength (wavelength outside the filter bandwidth range), both 1310nm/1550nm wavelengths can be tested.
In conclusion, the method for testing the multi-wavelength band light of the optical time domain reflectometer not only realizes the physical characteristics of the tested optical fiber for testing the band light, but also has the multi-wavelength testing function; and can identify whether there is light in the measured optical fiber and the wavelength of the optical signal in the measured optical fiber.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (4)
1. The method is characterized in that the optical time domain reflectometer comprises N test branches and a first optical switch unit for connecting the tested optical fibers into different test branches, N is a positive integer greater than or equal to 2, the test branches comprise a filter and an optical splitter or a circulator which are connected together, the passband characteristic of the filter on the same test branch is the same as the characteristic of the optical splitter or the circulator, one port of the optical splitter or the circulator is connected with a pulse laser, the wavelength characteristic of the filter on the same test branch is the same as the wavelength characteristic of the pulse laser, the wavelength characteristic of the filter on different test branches is different, the other port of the optical splitter or the circulator is connected with an optical fiber wavelength division multiplexer unit or a second optical switch unit for converting the light of the different test branches into a photoelectric detector, and the first optical switch unit, the pulse laser, the photoelectric detector and the optical fiber wavelength division multiplexer unit or the second optical switch unit are all connected with a data processing unit;
during testing, the data processing unit sends out a control command to control the first optical switch unit to connect the tested optical fiber into a filter of a testing branch circuit, and meanwhile, the data processing unit detects whether light exists in the tested optical fiber through the photoelectric detector, if so, the data processing unit controls the pulse laser on the testing branch circuit not to emit light, and the testing branch circuit does not test; if the photoelectric detector does not detect the optical signal, the data processing unit controls the pulse laser on the test branch to emit light, and the photoelectric detector collects the optical signal returned by the optical fiber Rayleigh scattering and sends the optical signal to the data processing unit for processing, so that the physical characteristics of the tested optical fiber detected by the pulse laser on the test branch at the wavelength are achieved;
and then the data processing unit controls the first optical switch unit to connect the tested optical fiber into the filter of the next test branch circuit, and continues testing until all the test branch circuits are tested.
2. The method for multi-wavelength banded optical testing of an optical time domain reflectometer according to claim 1 wherein when the first optical switch unit switches the optical fiber to be tested into the filter of one testing branch, the data processing unit detects that the optical signal exists in the optical fiber to be tested through the photoelectric detector, the wavelength of the light transmitted in the optical fiber to be tested is proved to be the wavelength of the filter, and the data processing unit marks the optical signal in the optical fiber to be tested as the light with the wavelength of the filter.
3. The method of claim 1, wherein the first optical switch unit comprises a single or a plurality of 1*2 optical switches.
4. The method of optical time domain reflectometry multi-wavelength banded optical testing of claim 1 wherein the fiber optic wavelength division multiplexer unit comprises a single or multiple fiber optic wavelength division multiplexers; the second optical switching unit includes optical switches of single or multiple 1*2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111487202.XA CN114189280B (en) | 2021-12-08 | 2021-12-08 | Multi-wavelength banded light testing method for optical time domain reflectometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111487202.XA CN114189280B (en) | 2021-12-08 | 2021-12-08 | Multi-wavelength banded light testing method for optical time domain reflectometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114189280A CN114189280A (en) | 2022-03-15 |
| CN114189280B true CN114189280B (en) | 2023-07-28 |
Family
ID=80603724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111487202.XA Active CN114189280B (en) | 2021-12-08 | 2021-12-08 | Multi-wavelength banded light testing method for optical time domain reflectometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114189280B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014183412A1 (en) * | 2013-05-17 | 2014-11-20 | 国家电网公司 | Multi-parameter distributed optical fiber sensing apparatus |
| EP3346250A1 (en) * | 2017-01-06 | 2018-07-11 | Sterlite Technologies Ltd | Method and system for differentiating macro-bend losses from splice and connector losses in fiber-optic links |
| CN111162835A (en) * | 2019-12-03 | 2020-05-15 | 浙江杰昆科技有限公司 | Optical time domain reflectometer |
| CN112054839A (en) * | 2020-08-11 | 2020-12-08 | 武汉光迅科技股份有限公司 | OTDR (optical time Domain reflectometer), test system, test method and storage medium |
-
2021
- 2021-12-08 CN CN202111487202.XA patent/CN114189280B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014183412A1 (en) * | 2013-05-17 | 2014-11-20 | 国家电网公司 | Multi-parameter distributed optical fiber sensing apparatus |
| EP3346250A1 (en) * | 2017-01-06 | 2018-07-11 | Sterlite Technologies Ltd | Method and system for differentiating macro-bend losses from splice and connector losses in fiber-optic links |
| CN111162835A (en) * | 2019-12-03 | 2020-05-15 | 浙江杰昆科技有限公司 | Optical time domain reflectometer |
| CN112054839A (en) * | 2020-08-11 | 2020-12-08 | 武汉光迅科技股份有限公司 | OTDR (optical time Domain reflectometer), test system, test method and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114189280A (en) | 2022-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4324581B2 (en) | Optical fiber condition monitoring device and method in optical network | |
| CN107483106B (en) | Online optical time domain reflectometer structure, detection system and detection method | |
| EP2356760B1 (en) | Method and apparatus for deriving parameters of optical paths in optical networks using a two-wavelength otdr and a wavelength-dependent reflective element | |
| EP2274595B1 (en) | Optical time-domain reflectometer | |
| US9130672B2 (en) | System and method for fault identification in optical communication systems | |
| CN103297126B (en) | The PON line fault monitoring method of optically-based labelling method and device thereof | |
| US20060007426A1 (en) | Novel Algorithm, Method and apparatus for In-Service Testing of Passive Optical Networks (PON) and Fiber to the Premise (FTTP) Networks | |
| EP0872721B1 (en) | Remote measurement of wavelength dependent information about optical components | |
| JPH0658840A (en) | System and method for inspecting optical fiber | |
| CN104935379B (en) | Optical fiber online monitoring system | |
| CN104601228A (en) | System and method for positioning PON network optical fiber link failures | |
| US5383015A (en) | Optical time domain reflectometry measurements on a multi-branch optical network using multiwavelength pass filters | |
| CN105530046A (en) | Method and system for realizing automatic tests on light power and branch attenuation faults | |
| EP1578038A1 (en) | Device and method for real-time optical network monitoring | |
| CN112713931B (en) | OTDR equipment, optical time domain reflection detection method and storage medium | |
| CN114189280B (en) | Multi-wavelength banded light testing method for optical time domain reflectometer | |
| JP7318705B2 (en) | Judgment device and judgment method | |
| CN109660294B (en) | Intelligent optical fiber matching system, method and device | |
| CN216252751U (en) | Multi-wavelength optical time domain reflectometer capable of carrying out optical test | |
| CN204362051U (en) | PON optical fiber link fault location system | |
| JP2002139403A (en) | Testing method of branched optical line | |
| CN219514082U (en) | Multi-wavelength optical time domain reflectometer capable of carrying out optical test | |
| JP4504789B2 (en) | Optical communication system and optical test apparatus | |
| JP3762186B2 (en) | Optical transmission line and optical transmission line with optical line monitoring device | |
| EP1578039A1 (en) | Device and method for real-time optical network monitoring |
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 |