CN105651488B - The measurement method of fibre-optical dispersion is realized based on laser beat frequency - Google Patents
The measurement method of fibre-optical dispersion is realized based on laser beat frequency Download PDFInfo
- Publication number
- CN105651488B CN105651488B CN201610113920.3A CN201610113920A CN105651488B CN 105651488 B CN105651488 B CN 105651488B CN 201610113920 A CN201610113920 A CN 201610113920A CN 105651488 B CN105651488 B CN 105651488B
- Authority
- CN
- China
- Prior art keywords
- fiber
- light
- division multiplexer
- wavelength division
- erbium
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
Abstract
The invention discloses a kind of measurement methods for realizing fibre-optical dispersion based on laser beat frequency, it is 980nm light that 980 pumping sources, which send out wavelength, after wavelength division multiplexer, amplify through erbium-doped fiber, pass through testing fiber, it is returned after the fiber resonance cavity being made up of again with FP chamber narrow band filters circulator, then in turn through testing fiber, erbium-doped fiber and wavelength division multiplexer, continue to reflect in index path via the light of sagnac rings reflection at this time, a part of light is transmitted using photodetector and spectrum analyzer via sagnac rings, it is long by the chamber for adjusting FP chamber narrow band filters, realization obtains multi-group data on spectrum analyzer, it is handled to obtain dispersed light spectrogram by origin softwares.The present invention efficiently solves the problems such as volume present in chromatic dispersion measurement currently on the market is big, weight weight and time are long.
Description
Technical field
The invention belongs to chromatic dispersion measurement method and technology fields, and in particular to a kind of to realize fibre-optical dispersion based on laser beat frequency
Measurement method.
Background technology
Nature has many substances all to have dispersion, various optical fiber and device（Optoisolator, circulator, light are opened
Close etc.）All there is dispersion.And the method for chromatic dispersion measurement has phase shift method, interferometry and impulse time delay method etc., wherein phase shift method most
It is common.Dispersion in optical fiber is influenced by light wave signaling rate, and different transmission speeds will produce different dispersions, it
It can lead to the pulse width of light pulse, and eventually lead to intersymbol interference and the increase of bit error rate.Current Agilent color
Measuring instrument measurement accuracy is dissipated to increase, but price is costly, volume is larger.Therefore, for point of view of practicability, further
Measurement accuracy is improved, time of measuring is shortened, it is the key that study at present to reduce cost and mitigate volume.
Invention content
The technical problem to be solved by the present invention is to provide a kind of measurement methods for realizing fibre-optical dispersion based on laser beat frequency, should
Method efficiently solves that the volume present in chromatic dispersion measurement currently on the market is big, weight weight, time are long and expensive asks
Topic.
The present invention adopts the following technical scheme that solve above-mentioned technical problem, and the survey of fibre-optical dispersion is realized based on laser beat frequency
Amount method, it is characterised in that：Measuring system mainly by sagnac rings, coupler, wavelength division multiplexer, 980 pumping sources, mix bait light
Fibre, testing fiber, circulator, FP chambers narrow band filter, photodetector and spectrum analyzer are constituted, wherein circulator and FP chambers
Narrow band filter constitutes fiber resonance cavity, and 980 pumping sources are connected by optical fiber with wavelength division multiplexer, and one end of wavelength division multiplexer is logical
Optical fiber is crossed successively to be connected with erbium-doped fiber, testing fiber and fiber resonance cavity, the other end of wavelength division multiplexer by optical fiber successively
Be connected with coupler and sagnac rings, one end of coupler transmitted light by optical fiber successively with photodetector and spectrum analyzer
It is connected；Specifically measurement process is：It is that 980nm light is put after wavelength division multiplexer through erbium-doped fiber that 980 pumping sources, which send out wavelength,
Greatly, it by testing fiber, then returns after the fiber resonance cavity that is made up of with FP chamber narrow band filters circulator, then passes through successively
Testing fiber, erbium-doped fiber and wavelength division multiplexer are crossed, continues to reflect in index path via the light of sagnac rings reflection at this time, pass through
A part of light is transmitted using photodetector and spectrum analyzer, by adjusting FP chamber narrow band filters by sagnac rings
Chamber is long, and realization obtains multi-group data on spectrum analyzer, is handled to obtain dispersed light spectrogram by origin softwares.
Compared with the prior art, the present invention has the following advantages：（1）By circulator structure is connect with FP chamber narrow band filters
At fiber resonance cavity, effectively prevents FP chamber narrow band filters itself and generate laser；（2）On the one hand it solves calibration and installation is tired
Difficult problem, small volume, on the other hand solve the problems, such as it is expensive, start it is very fast, it is easy to use.
Description of the drawings
Fig. 1 is the light path connection figure of the present invention.
Drawing explanation：1, sagnac rings, 2, coupler, 3,980 pumping sources, 4, wavelength division multiplexer, 5, erbium-doped fiber, 6, wait for
Survey optical fiber, 7, circulator, 8, FP chamber narrow band filters, 9, photodetector, 10, spectrum analyzer.
Specific implementation mode
In conjunction with attached drawing detailed description of the present invention particular content.The measuring device of fibre-optical dispersion is realized based on laser beat frequency,
Mainly by sagnac rings 1, coupler 2, wavelength division multiplexer 4,980 pumping sources 3, erbium-doped fiber 5, testing fiber 6, circulator 7, FP
Chamber narrow band filter 8, photodetector 9 and spectrum analyzer 10 are constituted, and wherein circulator 7 is constituted with FP chambers narrow band filter 8
Fiber resonance cavity, 980 pumping sources 3 are connected by optical fiber with wavelength division multiplexer 4, one end of wavelength division multiplexer 4 by optical fiber successively
Be connected with erbium-doped fiber 5, testing fiber 6 and fiber resonance cavity, the other end of wavelength division multiplexer 4 by optical fiber successively with coupler
2 are connected with sagnac rings 1, one end of 2 transmitted light of coupler by optical fiber successively with 10 phase of photodetector 9 and spectrum analyzer
Even.
The principle of the present invention is that the measurement of fibre-optical dispersion is realized based on laser beat frequency, i.e., sends out light by 980 pumping sources,
Sagnac ring reflecting lights form beat frequency phenomenon, draw spectrogram.First, it is 980nm light that 980 pumping sources, which send out wavelength, is passed through
After wavelength division multiplexer, amplify through erbium-doped fiber, by testing fiber, then passes through the light of circulator and FP chamber narrow band filters composition
It returns after fine resonant cavity, then in turn through testing fiber, erbium-doped fiber and wavelength division multiplexer, is reflected at this time via sagnac rings
Light continuation reflected in index path, transmit a part of light using photodetector and spectrum analysis via sagnac rings
Instrument, long by the chamber for adjusting FP chamber narrow band filters, realization obtains multi-group data on spectrum analyzer, by origin softwares
Reason obtains dispersed light spectrogram.
Have been shown and described above the basic principle of the present invention, main feature and advantage, do not depart from spirit of that invention and
Under the premise of range, the present invention also has various changes and modifications, these changes and improvements both fall within claimed invention
Range.
Claims (1)
1. realizing the measurement method of fibre-optical dispersion based on laser beat frequency, it is characterised in that：Measuring system is mainly by sagnac rings, coupling
Clutch, wavelength division multiplexer, 980 pumping sources, erbium-doped fiber, testing fiber, circulator, FP chambers narrow band filter, photodetector
Constituted with spectrum analyzer, wherein circulator and FP chamber narrow band filters constitutes fiber resonance cavity, 980 pumping sources by optical fiber with
Wavelength division multiplexer is connected, one end of wavelength division multiplexer by optical fiber successively with erbium-doped fiber, testing fiber and fiber resonance cavity phase
Even, the other end of wavelength division multiplexer is connected with coupler and sagnac rings successively by optical fiber, and one end of coupler transmitted light is logical
Optical fiber is crossed successively to be connected with photodetector and spectrum analyzer；Specifically measurement process is：980 pumping sources send out wavelength
980nm light amplifies after wavelength division multiplexer through erbium-doped fiber, is filtered by testing fiber, then by circulator and FP chambers narrowband
Wave device constitute fiber resonance cavity after return, then in turn through testing fiber, erbium-doped fiber and wavelength division multiplexer, at this time via
Sagnac rings reflection light continuation reflect in the optical path, via sagnac rings transmit a part of light using photodetector with
Spectrum analyzer, long by the chamber for adjusting FP chamber narrow band filters, realization obtains multi-group data on spectrum analyzer, by
Origin softwares handle to obtain dispersed light spectrogram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113920.3A CN105651488B (en) | 2016-03-01 | 2016-03-01 | The measurement method of fibre-optical dispersion is realized based on laser beat frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113920.3A CN105651488B (en) | 2016-03-01 | 2016-03-01 | The measurement method of fibre-optical dispersion is realized based on laser beat frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105651488A CN105651488A (en) | 2016-06-08 |
| CN105651488B true CN105651488B (en) | 2018-10-09 |
Family
ID=56492667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610113920.3A Expired - Fee Related CN105651488B (en) | 2016-03-01 | 2016-03-01 | The measurement method of fibre-optical dispersion is realized based on laser beat frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105651488B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768871A (en) * | 2016-11-14 | 2017-05-31 | 河南师范大学 | Method based on photoswitch laser beat frequency systematic survey fibre-optical dispersion |
| CN106596055A (en) * | 2016-11-14 | 2017-04-26 | 河南师范大学 | Fiber dispersion measuring method based on F-P adjustable filter |
| CN107796530B (en) * | 2017-10-20 | 2018-10-30 | 黑龙江工程学院 | A kind of spectrographic detection temperature sensor in parallel with FP chambers based on Sagnac rings |
| CN107817062B (en) * | 2017-10-20 | 2018-09-07 | 黑龙江工程学院 | A kind of oscillograph detection temperature sensor in parallel with FP chambers based on Sagnac rings |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592551A (en) * | 2009-06-05 | 2009-12-02 | 北京航空航天大学 | A kind of beat length of polarization maintaining optical fiber method of testing and proving installation based on the Sagnac interferometer |
| CN101639387A (en) * | 2009-09-11 | 2010-02-03 | 北京航空航天大学 | Optical fiber temperature sensor for detection based on wavelength corresponding to extreme value and temperature sensing method |
| CN101813459A (en) * | 2010-05-07 | 2010-08-25 | 上海交通大学 | Temperature-compensated optical fiber sagnac interference ring strain sensor |
| CN102003960A (en) * | 2010-10-15 | 2011-04-06 | 北京大学 | Multichannel feedback based Brillouin gyroscope |
| CN103957050A (en) * | 2014-04-23 | 2014-07-30 | 武汉虹拓新技术有限责任公司 | Dual-Sagnac loop chromatic dispersion measuring device and method |
| CN104849027A (en) * | 2015-05-14 | 2015-08-19 | 河南师范大学 | Laser-beat-frequency-based method for chromatic dispersion measurement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2999705B1 (en) * | 2012-12-19 | 2015-02-20 | Ixblue | INTERFEROMETRIC MEASURING DEVICE HAVING A FILTER INTERFEROMETER |
-
2016
- 2016-03-01 CN CN201610113920.3A patent/CN105651488B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592551A (en) * | 2009-06-05 | 2009-12-02 | 北京航空航天大学 | A kind of beat length of polarization maintaining optical fiber method of testing and proving installation based on the Sagnac interferometer |
| CN101639387A (en) * | 2009-09-11 | 2010-02-03 | 北京航空航天大学 | Optical fiber temperature sensor for detection based on wavelength corresponding to extreme value and temperature sensing method |
| CN101813459A (en) * | 2010-05-07 | 2010-08-25 | 上海交通大学 | Temperature-compensated optical fiber sagnac interference ring strain sensor |
| CN102003960A (en) * | 2010-10-15 | 2011-04-06 | 北京大学 | Multichannel feedback based Brillouin gyroscope |
| CN103957050A (en) * | 2014-04-23 | 2014-07-30 | 武汉虹拓新技术有限责任公司 | Dual-Sagnac loop chromatic dispersion measuring device and method |
| CN104849027A (en) * | 2015-05-14 | 2015-08-19 | 河南师范大学 | Laser-beat-frequency-based method for chromatic dispersion measurement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105651488A (en) | 2016-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105651488B (en) | The measurement method of fibre-optical dispersion is realized based on laser beat frequency | |
| CN102168953B (en) | Full-distributed optical fiber strain and vibration sensor based on coherent heterodyne detection | |
| US9304258B2 (en) | Optical fiber grating tracker and method for detecting optical fiber line fault | |
| CN108534910A (en) | A kind of distributed dual sampling method based on Asymmetric Twin-Core Fiber | |
| CN103364106B (en) | A kind of Brillouin optical time domain analysis sensor-based system based on the pumping of overlength loop laser | |
| CN103471701B (en) | A kind of fiber optic acoustic sensors and optical fiber acoustic sounding method | |
| CN106153225B (en) | A kind of fiber bragg grating transverse pressure sensing system and measurement method | |
| CN104165684B (en) | Surface plasmon resonance-based supersensitive hydrophone | |
| CN105244739A (en) | Ultra-narrow linewidth optical fiber laser | |
| CN102261965A (en) | Temperature sensing method and device based on double-core optical fiber | |
| CN102393182A (en) | Narrow-bandwidth Brillouin optical timedomain reflectometer (OTDR) based on sensing optical fiber of three-layer structure | |
| CN104390594B (en) | Optic fiber micro-structure displacement sensor | |
| CN103337776B (en) | All-optical fiber type self-mixing distance measuring system of laser | |
| CN102494799B (en) | Dual-wavelength optical delay optical fiber temperature sensor | |
| CN107167225B (en) | A kind of distributed optical fiber stress and the sensor-based system and its method for sensing of vibration | |
| CN104458080B (en) | A kind of fiber-optic pressure sensor measuring method and device | |
| CN103913423A (en) | Pulse broadband light source high-capacity photonic crystal fiber gas detection method, and system | |
| CN109001155A (en) | A kind of humidity measuring method based on low gain low noise optical fiber cavity attenuation and vibration technique | |
| CN106768871A (en) | Method based on photoswitch laser beat frequency systematic survey fibre-optical dispersion | |
| CN105424218A (en) | Double-beam interference type temperature measuring device for transformer | |
| CN110031097A (en) | A kind of all -fiber Gaussian SLED light source light spectrum planarizer | |
| CN110411959A (en) | For cavity sensor in the low detection limit of seawater salinity and temperature simultaneously measuring | |
| CN205449437U (en) | Measuring device based on optical fiber dispersion is realized to laser beat frequency | |
| CN205449290U (en) | Measuring device based on chromatic dispersion compensated fiber is realized to laser beat frequency | |
| CN102128643B (en) | Distributed sensing device on basis of superfine annular bipyramid optical fiber resonant cavity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181009 Termination date: 20190301 |