CN201408111Y - Optical fiber dispersion measuring instrument - Google Patents
Optical fiber dispersion measuring instrument Download PDFInfo
- Publication number
- CN201408111Y CN201408111Y CN200820228573XU CN200820228573U CN201408111Y CN 201408111 Y CN201408111 Y CN 201408111Y CN 200820228573X U CN200820228573X U CN 200820228573XU CN 200820228573 U CN200820228573 U CN 200820228573U CN 201408111 Y CN201408111 Y CN 201408111Y
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- catoptron
- optical fiber
- reflecting mirror
- fiber
- adapter
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Abstract
The utility model relates to an optical fiber dispersion measuring instrument, which comprises a broadband light source input port, an optical fiber coupler, a collimator, a first reflecting mirror, asecond reflecting mirror, a third reflecting mirror, a fourth reflecting mirror, a tenth reflecting mirror, a fifth reflecting mirror and a sixth reflecting mirror, a first optical fiber adapter, a second optical fiber adapter, a micro-objective, a twelfth reflecting mirror, an electric translation stage, a control port of the electric translation stage and an interference light output port, wherein the optical fiber coupler is arranged 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 by an optical fiber; the first reflecting mirror, the second reflecting mirror, the third reflecting mirror, the fourth reflecting mirror, the tenth reflecting mirror, the fifth reflecting mirror and the sixthreflecting mirror are positioned at the outlet end of the collimator and sequentially arranged along the light path; the first optical fiber adapter, the second optical fiber adapter, the micro-objective and the twelfth reflecting mirror are arranged at the output end of the optical fiber coupler and sequentially connected with each other by the optical fiber; the electric translation stage is arranged between the third reflecting mirror and the lower end of the fourth reflecting mirror; and after the optical fiber coupler has interference, the interference light output port by the optical fiber is arranged on the output port and connected by the optical fiber. The optical fiber dispersion measuring instrument solves the technical problems of low measuring accuracy and high measuring costin the prior art, and has the advantages of simple structure, low price, high detecting efficiency and the like.
Description
Technical field
The utility model relates to the optical fiber measurement field, is 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 purpose of this utility model is to provide a kind of optical fiber dispersion measuring apparatus, and it has solved, and the measuring accuracy in the background technology is low, the high technical matters of measurement cost.
The technical solution of the utility model is:
A kind of optical fiber dispersion measuring apparatus, this instrument comprises: the wideband light source input port is arranged at the fiber coupler of wideband light source input port output terminal; Be arranged at the collimating apparatus that the fiber coupler output terminal connects through optical fiber; Be arranged at first catoptron, second catoptron, the 3rd catoptron, the 4th catoptron, the tenth catoptron, the 5th catoptron, the 6th catoptron that the collimator port end sets gradually along light path; The motorized precision translation stage of lower end that is arranged at the 3rd catoptron and the 4th catoptron is with the motorized precision translation stage control port; This instrument also comprises the interference light output port that the output terminal after being arranged at fiber coupler interferes connects through optical fiber; And microcobjective, the tenth two-mirror; It is characterized in that: also be provided with the 11 catoptron, the 7th catoptron, the 8th catoptron, the 9th catoptron on the reflected light path of described the 6th catoptron successively; The output terminal of described fiber coupler is provided with first fiber adapter, also is provided with Polarization Controller between the described fiber coupler output terminal and first fiber adapter, and the output terminal of described the tenth two-mirror is provided with second fiber adapter.
Above-mentioned the 6th catoptron also be provided with the 11 catoptron, the 7th catoptron, the 8th catoptron, the 9th catoptron successively along reflected light path;
Also be provided with Polarization Controller between the above-mentioned fiber coupler output terminal and first fiber adapter.
Above-mentioned the 3rd catoptron, the 4th catoptron, the tenth catoptron and the 11 catoptron are portable catoptron.
The FC/PC plug type optical fiber interface that above-mentioned wideband light source input port is a standard.
Advantage of the present utility model is:
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 the utility model chromatic dispersion measurement device.
Reference numeral:
1-wideband light source input port; 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; 701-first fiber adapter, 702-second fiber adapter; 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 first fiber adapter 701, second fiber adapter 702, microcobjective 6 and the tenth two-mirror 412 that fiber coupler 2 output terminals connect in turn through optical fiber, fiber coupler 2 output terminals and have between first fiber adapter 701 and also be provided with Polarization Controller 8; 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 first fiber adapter 701 and second fiber adapter 702 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 first fiber adapter (701), the output terminal of described microcobjective (6) is provided with second 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 a FC/PC plug type optical fiber interface.
4. optical fiber dispersion measuring apparatus according to claim 3 is characterized in that: described first fiber adapter (701) is a FC/PC plug type optical fiber interface with second fiber adapter (702).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820228573XU CN201408111Y (en) | 2008-12-31 | 2008-12-31 | Optical fiber dispersion measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820228573XU CN201408111Y (en) | 2008-12-31 | 2008-12-31 | Optical fiber dispersion measuring instrument |
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| Publication Number | Publication Date |
|---|---|
| CN201408111Y true CN201408111Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200820228573XU Expired - Lifetime CN201408111Y (en) | 2008-12-31 | 2008-12-31 | Optical fiber dispersion measuring instrument |
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| CN (1) | CN201408111Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769819B (en) * | 2008-12-31 | 2011-07-20 | 中国科学院西安光学精密机械研究所 | Optical fiber dispersion measuring apparatus |
| CN104280213A (en) * | 2014-09-23 | 2015-01-14 | 中天科技光纤有限公司 | Optical fiber testing device integration system and operation method |
-
2008
- 2008-12-31 CN CN200820228573XU patent/CN201408111Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769819B (en) * | 2008-12-31 | 2011-07-20 | 中国科学院西安光学精密机械研究所 | Optical fiber dispersion measuring apparatus |
| CN104280213A (en) * | 2014-09-23 | 2015-01-14 | 中天科技光纤有限公司 | Optical fiber testing device integration system and operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100217 Effective date of abandoning: 20081231 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20100217 Effective date of abandoning: 20081231 |