CN101769819A - Optical Fiber Dispersion Measuring Instrument - Google Patents
Optical Fiber Dispersion Measuring Instrument Download PDFInfo
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- CN101769819A CN101769819A CN200810236573A CN200810236573A CN101769819A CN 101769819 A CN101769819 A CN 101769819A CN 200810236573 A CN200810236573 A CN 200810236573A CN 200810236573 A CN200810236573 A CN 200810236573A CN 101769819 A CN101769819 A CN 101769819A
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- catoptron
- optical fiber
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- fiber coupler
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 48
- 239000006185 dispersion Substances 0.000 title claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 51
- 238000013519 translation Methods 0.000 claims abstract description 12
- 230000010287 polarization Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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- Testing Of Optical Devices Or Fibers (AREA)
Abstract
A fiber optic dispersion gauge, comprising: the broadband light source input port is arranged on the optical fiber coupler at the output end of the broadband light source input port; the collimator is arranged at the output end of the optical fiber coupler and connected with the output end of the optical fiber coupler through an optical fiber; the first reflector, the second reflector, the third reflector, the fourth reflector, the tenth reflector, the fifth reflector and the sixth reflector are arranged at the outlet end of the collimator in sequence along the light path; the optical fiber adapter, the microobjective and the twelfth reflecting mirror are arranged at the output end of the optical fiber coupler and are sequentially connected through optical fibers; the electric translation stages are arranged at the lower ends of the third reflector and the fourth reflector, and control ports of the electric translation stages are arranged; the instrument also comprises an interference light output port which is arranged at the output end of the optical fiber coupler after interference and is connected with the output end of the optical fiber coupler through an optical fiber; the invention solves the technical problems of low measurement precision and high measurement cost in the prior art. The device has the advantages of simple structure, low price, high detection efficiency and the like.
Description
Technical field
The present invention relates to the optical fiber measurement field, be specifically related to a kind of optical fiber dispersion measuring apparatus.
Background technology
Because fibre-optical dispersion is a crucial physical quantity describing the fiber optic materials characteristic, especially the characteristic of generation, amplification and the transmission of ultra-short pulse laser in optical fiber, the light wave quality that information is transmitted in the optical-fibre communications device etc., all be subjected to the influence and the restriction of fibre-optical dispersion amount to a great extent, so be important evidence to optical-fiber laser device and communication device design to the accurate measurement of fibre-optical dispersion.The fibre-optical dispersion measuring method of each industrial laboratories and research institution use at present mainly contains time delay method, phase-shift method, mode field diameter method and interferometric method.The use of time delay method needs testing fiber length very long, generally must surpass 0.5km, and measuring accuracy is low, and temporal resolution is 50ps only; Phase-shift method needs the tunable optical source of high s/n ratio, high degree of regulation, causes the measurement cost too high; The material dispersion value that the mode field diameter method needs independent measurement to go out optical fiber could draw its total dispersion amount indirectly.
Summary of the invention
The object of the present invention is to provide a kind of optical fiber dispersion measuring apparatus, it has solved, and the measuring accuracy in the background technology is low, the high technical matters of measurement cost.
Technical scheme of the present invention is:
A kind of optical fiber dispersion measuring apparatus, this instrument comprises: wideband light source input port 1 is arranged at the fiber coupler 2 of wideband light source input port 1 output terminal; Be arranged at the collimating apparatus 3 that fiber coupler 2 output terminals connect through optical fiber 201; Be arranged at first catoptron 401, second catoptron 402, the 3rd catoptron 403, the 4th catoptron 404, the tenth catoptron 410, the 5th catoptron 405, the 6th catoptron 406 that collimating apparatus 3 endpiece set gradually along light path; The motorized precision translation stage 5 of lower end that is arranged at the 3rd catoptron 403 and the 4th catoptron 404 is with motorized precision translation stage control port 501; This instrument also comprises the interference light output port 9 that the output terminal that is arranged at after fiber coupler 2 interferes connects through optical fiber; And microcobjective 6, the tenth two-mirror 412; It is characterized in that: also be provided with the 11 catoptron 411, the 7th catoptron 407, the 8th catoptron 408, the 9th catoptron 409 on the reflected light path of described the 6th catoptron 406 successively; The output terminal of described fiber coupler 2 is provided with first fiber adapter 701, also is provided with Polarization Controller 8 between described fiber coupler 2 output terminals and the fiber adapter 701, and the output terminal of described the tenth two-mirror 412 is provided with fiber adapter 702.
Above-mentioned the 6th catoptron 406 also be provided with the 11 catoptron 411, the 7th catoptron 407, the 8th catoptron 408, the 9th catoptron 409 successively along reflected light path;
Also be provided with Polarization Controller 8 between above-mentioned fiber coupler 2 output terminals and the fiber adapter 701.
Above-mentioned the 3rd catoptron 403, the 4th catoptron 404, the tenth catoptron 410 and the 11 catoptron 411 are portable catoptron.
The FC/PC plug type optical fiber interface that above-mentioned wideband light source input port 1 is a standard.
The invention has the advantages that:
The temporal resolution that adopts optical fiber dispersion measuring apparatus and interferometric method measurement chromatic dispersion is up to 0.1ps, and light path is an all optical fibre structure, only needs short fiber can satisfy measurement requirement; Its measuring method is simple, quick, cheap, detection efficiency is also than higher; The structure of optical fiber dispersion measuring apparatus device is also fairly simple.
Description of drawings:
Fig. 1 is the structural representation of chromatic dispersion measurement device of the present invention.
Reference numeral:
The 1-wideband light source; The 2-fiber coupler; The 3-optical fiber collimator; The 4-reflection unit, 401-first catoptron, 402-second catoptron, 403-the 3rd catoptron, 404-the 4th catoptron, 405-the 5th catoptron, 406-the 6th catoptron, 407-the 7th catoptron, 408-the 8th catoptron, 409-the 9th catoptron, 410-the tenth catoptron, 411-the 11 catoptron, 412-the tenth two-mirror; The 5-translation stage; The 6-microcobjective; The 7-fiber adjusting mount; The 8-Polarization Controller; 9-interference light output port; The 10-testing fiber.
Embodiment:
Referring to Fig. 1
A kind of optical fiber dispersion measuring apparatus, this instrument comprises: wideband light source input port 1, wideband light source input port 1 are the FC/PC plug type optical fiber interface of standard.Be arranged at the fiber coupler 2 of wideband light source input port 1 output terminal; Be arranged at the collimating apparatus 3 that fiber coupler 2 output terminals connect through optical fiber 201; Be arranged at first catoptron 401, second catoptron 402, the 3rd catoptron 403, the 4th catoptron 404, the tenth catoptron 410, the 5th catoptron 405, the 6th catoptron 406 that collimating apparatus 3 endpiece set gradually along light path; The 6th catoptron 406 time also be provided with the 11 catoptron 411, the 7th catoptron 407, the 8th catoptron 408, the 9th catoptron 409 successively along reflected light path; Be arranged at fiber adapter 701, fiber adapter 702, microcobjective 6 and the tenth two-mirror 412 that fiber coupler 2 output terminals connect in turn through optical fiber, also be provided with Polarization Controller 8 between fiber coupler 2 output terminals and the fiber adapter 701; Be arranged at the motorized precision translation stage 5 and the motorized precision translation stage control port 501 of the lower end of the 3rd catoptron 403 and the 4th catoptron 404; The 3rd catoptron 403, the 4th catoptron 404, the tenth catoptron 410 and the 11 catoptron 411 are portable catoptron; This instrument also comprises the interference light output port 9 that the output terminal that is arranged at after fiber coupler 2 interferes connects through optical fiber.
Principle of work is as follows:
(i), the 1 input light source of the input port by wideband light source, with the wideband light source of output by in optical fiber 101 incoming fiber optic coupling mechanisms 2.
(ii), light source beam splitting: the output light of 2 pairs of wideband light sources of fiber coupler carries out beam splitting, forms space optical path 201 and light path 202; Light path 201 is a spatial transmission light, and its light field is propagated in air, the time delay that does not have chromatic dispersion to cause.Georeferencing light is folding through first catoptron 401 and 402 reflections of second catoptron on travel path, incide the 3rd catoptron 403 that is placed on the motorized precision translation stage 5, and reflect successively until the 9th catoptron 409, the nine catoptrons 409 by the 4th catoptron 404, the tenth catoptron 410, the 5th catoptron 405, the 6th catoptron the 406, the 11 catoptron 411, the 7th catoptron 407 and the 8th catoptron 408 the light beam vertical reflection is returned.The tenth catoptron 410 and the 11 catoptron 411 are catoptrons movably, can cut light path at any time with the former road of light beam reflected back, and this is in order to change the spatial light light path.The 3rd catoptron 403 on the motorized precision translation stage 5 and the 4th catoptron 404 can move with change spatial light light path along with translation stage, but its beam reflected is all the time on same light path.Measuring light path 202 is that testing fiber 10 collimates the light beam of output through the tenth two-mirror 412 former road reflected back optical fiber.Testing fiber 10 is to insert by the FC/PC fiber adapter to measure light path, this adapter can insert dissimilar naked fine adapters, thereby can measure various types of optical fiber, all can be clamped in to insert again on the corresponding naked fine adapter as general single mode fiber, rare-earth ion-doped optical fiber, photonic crystal fiber or the like and measure light path.The wave band of measuring can come conversion by changing wideband light source, uses ytterbium ion ASE light source, can measure the dispersion values of 1030nm-1080nm spectral range; Use erbium ion ASE light source, also can measure the dispersion values of 1530nm-1580nm spectral range.Measure the dispersion values of other wave band as needs, the wideband light source of changing corresponding wave band gets final product.At first estimate its light path when measuring beginning, check according to estimated value which light path interval, space it belongs to, select corresponding catoptron to constitute space optical path again according to testing fiber length.Regulate the catoptron of reference path and measurement light path, make light beam 50: 50 fiber couplers of reflected back efficiently.Tail optical fiber 901 is inserted spectrometer, observe the spectral line of interfering, regulate Polarization Controller, until interference fringe contrast maximum from spectrometer.Read spectroscopic data from the computing machine that is connected with spectrometer,, select best fit parameters, draw the CHROMATIC DISPERSION IN FIBER OPTICS value with the software match curve of spectrum.
(iii), output light source: the optical fiber of fiber coupler 2 outputs is exported conduct with reference to light along space optical path 201 by optical fiber collimator 3; Enter testing fiber along light path 202 by Polarization Controller 8, testing fiber enters microcobjective 6 by fiber adapter 7 along light path and enters catoptron 412;
(iv), light path switches: described space optical path 201 carries out the switching of spatial light light path by broadband reflection system 4 movably, realizes the measurement to the interval optical fiber of different length.
(v), light field is returned: described space optical path 201 returns along former road with light path 202, enter fiber coupler 2 once more and interfere, this just is equivalent to Michelson's interferometer, interference fringe is the wave band symmetry expansions of middle mind-set both sides with the wavelength at aplanatism place, be periodic intensity and rise and fall, the spectrum of interference detects via the output terminal input spectrum instrument of coupling mechanism.
(vi), regulate light path: regulate the light path of georeferencing light, make it and to realize aplanatism with certain wavelength of measuring light behind dispersion interaction.
(vii), determine dispersion values: when measuring with certain wavelength is the interference spectrum pattern at center, and spectrum is carried out numerical fitting, with the contrast of chromatic dispersion equation, thereby draws the CHROMATIC DISPERSION IN FIBER OPTICS value.
Claims (4)
1. optical fiber dispersion measuring apparatus, this instrument comprises: wideband light source input port (1) is arranged at the fiber coupler (2) of wideband light source input port (1) output terminal; Be arranged at the collimating apparatus (3) that fiber coupler (2) output terminal connects through optical fiber (201); Be arranged at first catoptron (401), second catoptron (402), the 3rd catoptron (403), the 4th catoptron (404), the tenth catoptron (410), the 5th catoptron (405), the 6th catoptron (406) that collimating apparatus (3) endpiece sets gradually along light path; The motorized precision translation stage (5) of lower end that is arranged at the 3rd catoptron (403) and the 4th catoptron (404) is with motorized precision translation stage control port (501); This instrument also comprises the interference light output port (9) that the output terminal that is arranged at after fiber coupler (2) interferes connects through optical fiber; And the tenth two-mirror (412), be arranged at the microcobjective (6) of the tenth two-mirror (412) upper end; It is characterized in that: also be provided with the 11 catoptron (411), the 7th catoptron (407), the 8th catoptron (408), the 9th catoptron (409) on the reflected light path of described the 6th catoptron (406) successively; The output terminal of described fiber coupler (2) is provided with first fiber adapter (701), be provided with Polarization Controller (8) between described fiber coupler (2) output terminal and the fiber adapter (701), the output terminal of described microcobjective (6) is provided with fiber adapter (702).
2. optical fiber dispersion measuring apparatus according to claim 1 is characterized in that: described the 3rd catoptron (403), the 4th catoptron (404), the tenth catoptron (410) and the 11 catoptron (411) are portable catoptron.
3. optical fiber dispersion measuring apparatus according to claim 1 and 2 is characterized in that: described wideband light source input port 1 is FC/PC plug type optical fiber interface.
4. optical fiber dispersion measuring apparatus according to claim 3 is characterized in that: described fiber adapter (701) is a FC/PC plug type optical fiber interface with fiber adapter (702).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102365739A CN101769819B (en) | 2008-12-31 | 2008-12-31 | Optical Fiber Dispersion Measuring Instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102365739A CN101769819B (en) | 2008-12-31 | 2008-12-31 | Optical Fiber Dispersion Measuring Instrument |
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| CN101769819A true CN101769819A (en) | 2010-07-07 |
| CN101769819B CN101769819B (en) | 2011-07-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636337A (en) * | 2012-04-26 | 2012-08-15 | 江苏大学 | Method for measuring optical fiber dispersion |
| CN103033340A (en) * | 2011-09-28 | 2013-04-10 | 中国科学院西安光学精密机械研究所 | Testing device and testing method for sampling rate of large-caliber sampling grating |
| CN103792070A (en) * | 2014-01-21 | 2014-05-14 | 北京工业大学 | Semiconductor laser array optical characteristic detection device |
| CN113804405A (en) * | 2021-08-16 | 2021-12-17 | 广东工业大学 | Micro optical fiber dispersion measuring device based on double-coupler ring optical path structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2514813C (en) * | 2003-02-06 | 2010-05-11 | Exfo Electro-Optical Engineering Inc | Method and apparatus for measuring polarization mode dispersion |
| ATE350656T1 (en) * | 2003-02-21 | 2007-01-15 | Thorlabs Inc | DEVICE AND METHOD FOR DETERMINING THE CHROMATIC DISPERSION OF OPTICAL COMPONENTS |
| EP1901052B1 (en) * | 2006-09-16 | 2010-11-03 | Acterna, LLC | Measuring polarization mode dispersion |
| CN201408111Y (en) * | 2008-12-31 | 2010-02-17 | 中国科学院西安光学精密机械研究所 | Optical fiber dispersion measuring instrument |
-
2008
- 2008-12-31 CN CN2008102365739A patent/CN101769819B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033340A (en) * | 2011-09-28 | 2013-04-10 | 中国科学院西安光学精密机械研究所 | Testing device and testing method for sampling rate of large-caliber sampling grating |
| CN103033340B (en) * | 2011-09-28 | 2016-06-08 | 中国科学院西安光学精密机械研究所 | Testing device and testing method for sampling rate of large-caliber sampling grating |
| CN102636337A (en) * | 2012-04-26 | 2012-08-15 | 江苏大学 | Method for measuring optical fiber dispersion |
| CN103792070A (en) * | 2014-01-21 | 2014-05-14 | 北京工业大学 | Semiconductor laser array optical characteristic detection device |
| CN103792070B (en) * | 2014-01-21 | 2016-05-18 | 北京工业大学 | Semiconductor laser array optical characteristics checkout gear |
| CN113804405A (en) * | 2021-08-16 | 2021-12-17 | 广东工业大学 | Micro optical fiber dispersion measuring device based on double-coupler ring optical path structure |
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| CN101769819B (en) | 2011-07-20 |
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Application publication date: 20100707 Assignee: XI'AN SINO HUAXIN MEASUREMENT & CONTROL CO.,LTD. Assignor: XI'AN INSTITUTE OF OPTICS AND PRECISION MECHANICS OF CAS Contract record no.: 2013610000120 Denomination of invention: Optical fiber dispersion measuring apparatus Granted publication date: 20110720 License type: Exclusive License Record date: 20131225 |
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