CN105651494A - Testing method for reflectivity of multimode optical fiber reflector - Google Patents

Testing method for reflectivity of multimode optical fiber reflector Download PDF

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Publication number
CN105651494A
CN105651494A CN201610160354.1A CN201610160354A CN105651494A CN 105651494 A CN105651494 A CN 105651494A CN 201610160354 A CN201610160354 A CN 201610160354A CN 105651494 A CN105651494 A CN 105651494A
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optical fiber
fiber coupler
multimode fibre
module optical
held
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CN105651494B (en
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郑国康
夏君磊
汪飞琴
黄韬
宁智超
乔建坤
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Beijing Aerospace Times Optical Electronic Technology Co Ltd
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Beijing Aerospace Times Optical Electronic Technology Co Ltd
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    • 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
    • G01M11/02—Testing optical properties

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

The invention relates to a testing method for the reflectivity of a multimode optical fiber reflector. The testing method includes the steps that the reflectivity of a multimode optical fiber reflector standard part is tested accurately, a testing optical path is calibrated with the multimode optical fiber reflector standard part, after being calibrated, the testing optical path is connected with the multimode optical fiber reflector to be tested, output optical power of the multimode optical fiber reflector standard part is compared with output optical power of the multimode optical fiber reflector to be tested, and the reflectivity of the multimode optical fiber reflector to be tested can be calculated. According to the testing method, a user only needs to weld one optical fiber welding point when each reflector is tested, the method is simple and easy to operate and improves testing efficiency, the fluctuation of the output power of the multimode optical fiber reflector is monitored through a double-channel optical power meter in real time, stability of the testing optical path can be evaluated, testing errors are reduced, and the multimode optical fiber reflector can be tested fast and accurately.

Description

A kind of method of testing of multimode fibre reflectance of reflector
Technical field
The present invention relates to the method for testing of a kind of multimode fibre reflecting mirror, it is achieved the accurate test of multimode fibre reflectance of reflector.
Background technology
Fiber reflector is that a kind of utilization is deposited with reflectance coating at fiber end face or pastes reflector plate, by the emergent light wave reflection back into optical fibers of fiber end face, it is achieved the optics of light wave reverse transfer in a fiber. Being widely used in optical fiber sensing system, wherein reflectance is one of leading indicator of fiber reflector.
Difference according to spread fiber pattern quantity used in fiber reflector, it is possible to fiber reflector is divided into single-mode fiber reflecting mirror and multimode fibre reflecting mirror. Single-mode fiber reflecting mirror is owing to only propagating a pattern, and optical property is more stable, and the accuracy of reflectance test is higher. Multimode fibre reflecting mirror is owing to transmitting multiple pattern, and when testing reflectance, optical system for testing temperature to external world or stress ratio are more sensitive, there is the phenomenon of output-power fluctuation, and this will cause very big reflectance test error. The method of testing of a kind of multimode fibre reflecting mirror has been gone out, it may be achieved the quick and precisely test of multimode fibre reflectance of reflector for this Study on Problems.
Existing multimode fibre reflectance of reflector method of testing is when building optical system for testing every time, it is necessary to the biography optical property of multi-module optical fiber coupler is tested, and testing procedure is complicated. And multi-module optical fiber coupler temperature to external world or stress ratio are more sensitive, there is the phenomenon of output-power fluctuation in light path build process, this will cause very big reflectance test error. Existing method of testing adopts intercept method test simultaneously, and testing efficiency is low, and optical fiber consumption is big.
Summary of the invention
The technology of the present invention solves problem: overcome the deficiency of existing method of testing, it is provided that the method for testing of a kind of multimode fibre reflectance of reflector, it is achieved the quick and precisely test of multimode fibre reflectance of reflector.
The technical scheme is that the method for testing of a kind of multimode fibre reflectance of reflector, step is as follows:
(1) laser instrument is connected with " 3 " end of multi-module optical fiber coupler, light power meter is held with " 2 " of multi-module optical fiber coupler and is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the optical transmission efficiency that test multimode fibre mode coupler " 3 " end is held to multimode fibre mode coupler " 2 ", is designated as L32;
(2) laser instrument is connected with " 4 " end of multi-module optical fiber coupler, light power meter is held with " 2 " of multi-module optical fiber coupler and is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the optical transmission efficiency that test multimode fibre mode coupler " 4 " end is held to multimode fibre mode coupler " 2 ", is designated as L42;
(3) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, dual pathways light power meter is held with " 3 " of multi-module optical fiber coupler and " 4 " end is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the splitting ratio that test multimode fibre mode coupler " 3 " end, multimode fibre mode coupler " 4 " are held, is designated as S34;
(4) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, remain and multi-module optical fiber coupler " 3 " end is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection;
(5) calculate, according to formula (1), the end face reflection rate R that acquisition multi-module optical fiber coupler " 4 " is held0
R 0 = P 2 ′ P 4 ′ · L 42 + P 2 ′ ... ( 1 )
In formula:
P2' represent at the Output optical power that the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P4' represent at the Output optical power that the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(6) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, and is held with " 3 " of multi-module optical fiber coupler by multimode fibre reflecting mirror standard component and is connected;
(7) the reflectance R of multimode fibre reflecting mirror standard component is calculated according to formula (2)Standard component
In formula:
P2Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P4Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(8) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, at the multimode fibre that the first welding one section of multi-module optical fiber coupler " 3 " end is the same with multimode fibre reflecting mirror fiber type, then by multimode fibre reflecting mirror standard component and this multimode fibre welding; The output that now multi-module optical fiber coupler " 2 " is held is calculated as P2, the output that multi-module optical fiber coupler " 4 " is held is calculated as P4;
(9) multimode fibre reflecting mirror standard component being replaced by multimode fibre reflecting mirror to be measured, the output that now multi-module optical fiber coupler " 2 " is held is calculated as P2 survey, the output that " 4 " hold is calculated as P4 survey;
(10) the reflectance R obtaining multimode fibre reflecting mirror to be measured is calculated according to formula (3)
(11) contrast P4And P4 surveyDifference, whether the biography light characteristic of monitor in real time optical system for testing changes, if difference is less than 2%, then shows that optical system for testing passes light characteristic stable, and test passes continues next multimode fibre reflecting mirror to be measured is tested; If difference is be more than or equal to 2%, then return step (8), by multimode fibre reflecting mirror standard component Recalibration test light path.
In described step (6), the fiber type of multimode fibre reflecting mirror standard component is consistent with the fiber type of multimode fibre reflecting mirror to be measured.
Present invention advantage compared with prior art is in that:
(1) when present invention multimode fibre in changing optical system for testing couples or again builds test light rate, only need to adopt multimode fibre reflecting mirror standard component calibration optical system for testing, the biography optical property of multi-module optical fiber coupler need not being tested, method is simple to operation;
(2) present invention adopts the method compared with multimode fibre reflecting mirror standard component, overcomes the accurate test needing to adopt intercept method could realize reflectance in existing method of testing. Test every reflecting mirror and have only to one fusion point of welding, improve testing efficiency.
(3) present invention adopts the output-power fluctuation of dual pathways light power meter monitor in real time multi-module optical fiber coupler, it is possible to the stability of evaluation test light path, reduces test error, it is achieved accurately test.
Accompanying drawing explanation
Fig. 1 is multimode fibre mode coupler 3-2 end optical transmission efficiency optical system for testing figure;
Fig. 2 is multi-module optical fiber coupler 4-2 end optical transmission efficiency optical system for testing figure;
Fig. 3 is multi-module optical fiber coupler 3-4 end splitting ratio optical system for testing figure;
Fig. 4 a is the end face reflection rate optical system for testing of multi-module optical fiber coupler 4 end;
Fig. 4 b is multimode fibre reflecting mirror standard component Planar mirror optical system for testing figure;
Fig. 5 is multimode fibre mirror test index path.
Detailed description of the invention
The invention provides the quick and precisely method of testing of a kind of multimode fibre reflectance of reflector. Implement step as follows:
(1) laser instrument and dual pathways energy meter are built optical system for testing as shown in Figure 1, the optical transmission efficiency that test multimode fibre mode coupler " 3 " end is held to multimode fibre mode coupler " 2 ", it is designated as L32, unit is %;
(2) laser instrument and dual pathways energy meter are built optical system for testing as shown in Figure 2, the optical transmission efficiency that test multimode fibre mode coupler " 4 " end is held to multimode fibre mode coupler " 2 ", it is designated as L42, unit is %;
(3) laser instrument and dual pathways energy meter are built optical system for testing as shown in Figure 3, the splitting ratio that test multimode fibre mode coupler " 3 " end, multimode fibre mode coupler " 4 " are held, it is designated as S34;
(4) laser instrument, dual pathways energy meter and multi-module optical fiber coupler are built optical system for testing as shown in fig. 4 a, and multi-module optical fiber coupler " 3 " end is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection;
(5) calculate, according to formula (1), the end face reflection rate R that multi-module optical fiber coupler " 4 " is held0��
R 0 = P 2 ′ P 4 ′ · L 42 + P 2 ′ ... ( 1 )
In formula:
R0The end face reflection rate that multi-module optical fiber coupler " 4 " is held, unit is %;
P2' represent at the Output optical power that the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P4' represent at the Output optical power that the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(6) laser instrument, dual pathways power, multi-module optical fiber coupler and multimode fibre reflecting mirror standard component being built optical system for testing as shown in Figure 4 b, the fiber type of multimode fibre reflecting mirror standard component should be consistent with the fiber type of testing fiber reflecting mirror;
(7) the reflectance R of multimode fibre reflecting mirror standard component is calculated according to formula (2)Standard component��
In formula:
RStandard componentThe reflectance of multimode fibre reflecting mirror standard component, unit %;
P2Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P4Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(8) laser instrument, dual pathways energy meter, multi-module optical fiber coupler and multimode fibre reflecting mirror standard component are built optical system for testing as shown in Figure 5, at the multimode fibre that the first welding one section of multi-module optical fiber coupler " 3 " end is the same with multimode fibre reflecting mirror fiber type. The output that now multi-module optical fiber coupler " 2 " is held is calculated as P2, the output that " 4 " hold is calculated as P4;
(9) multimode fibre reflecting mirror standard component being replaced by multimode fibre reflecting mirror to be measured, the output that now multi-module optical fiber coupler " 2 " is held is calculated as P2 survey, the output that " 4 " hold is calculated as P4 survey
(10) calculate the reflectance R of multimode fibre reflecting mirror to be measured according to formula (3), unit is %.
(11) contrast P4And P4 surveyDifference, whether the biography light characteristic of monitor in real time optical system for testing changes, if difference is less than 2%, then shows that optical system for testing passes light characteristic stable, and test passes continues next multimode fibre reflecting mirror to be measured is tested; If difference is be more than or equal to 2%, then return step (8), by multimode fibre reflecting mirror standard component Recalibration test light path.

Claims (2)

1. the method for testing of a multimode fibre reflectance of reflector, it is characterised in that step is as follows:
(1) laser instrument is connected with " 3 " end of multi-module optical fiber coupler, light power meter is held with " 2 " of multi-module optical fiber coupler and is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the optical transmission efficiency that test multimode fibre mode coupler " 3 " end is held to multimode fibre mode coupler " 2 ", is designated as L32;
(2) laser instrument is connected with " 4 " end of multi-module optical fiber coupler, light power meter is held with " 2 " of multi-module optical fiber coupler and is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the optical transmission efficiency that test multimode fibre mode coupler " 4 " end is held to multimode fibre mode coupler " 2 ", is designated as L42;
(3) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, dual pathways light power meter is held with " 3 " of multi-module optical fiber coupler and " 4 " end is connected, residue termination is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection, the splitting ratio that test multimode fibre mode coupler " 3 " end, multimode fibre mode coupler " 4 " are held, is designated as S34;
(4) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, remain and multi-module optical fiber coupler " 3 " end is dipped in index-matching fluid or cuts sth. askew, to eliminate end face reflection;
(5) calculate, according to formula (1), the end face reflection rate R that acquisition multi-module optical fiber coupler " 4 " is held0
R 0 = P 2 ′ P 4 ′ · L 42 + P 2 ′ ... ( 1 )
In formula:
P��2Represent at the Output optical power that the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P��4Represent at the Output optical power that the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(6) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, and is held with " 3 " of multi-module optical fiber coupler by multimode fibre reflecting mirror standard component and is connected;
(7) the reflectance R of multimode fibre reflecting mirror standard component is calculated according to formula (2)Standard component
In formula:
P2Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 2 " of energy meter channel C H1 build-in test is held;
P4Represent the Output optical power that when multimode fibre reflecting mirror standard component is tested, the multi-module optical fiber coupler " 4 " of energy meter channel C H2 build-in test is held;
(8) laser instrument is connected with " 1 " end of multi-module optical fiber coupler, the energy meter channel C H1 of dual pathways light power meter holds with " 2 " of multi-module optical fiber coupler and is connected, the energy meter channel C H2 of dual pathways light power meter holds with " 4 " of multi-module optical fiber coupler and is connected, at the multimode fibre that the first welding one section of multi-module optical fiber coupler " 3 " end is the same with multimode fibre reflecting mirror fiber type, then by multimode fibre reflecting mirror standard component and this multimode fibre welding; The output that now multi-module optical fiber coupler " 2 " is held is calculated as P2, the output that multi-module optical fiber coupler " 4 " is held is calculated as P4;
(9) multimode fibre reflecting mirror standard component being replaced by multimode fibre reflecting mirror to be measured, the output that now multi-module optical fiber coupler " 2 " is held is calculated as P2 survey, the output that " 4 " hold is calculated as P4 survey;
(10) the reflectance R obtaining multimode fibre reflecting mirror to be measured is calculated according to formula (3)
(11) contrast P4And P4 surveyDifference, whether the biography light characteristic of monitor in real time optical system for testing changes, if difference is less than 2%, then shows that optical system for testing passes light characteristic stable, and test passes continues next multimode fibre reflecting mirror to be measured is tested; If difference is be more than or equal to 2%, then return step (8), by multimode fibre reflecting mirror standard component Recalibration test light path.
2. the method for testing of a kind of multimode fibre reflectance of reflector according to claim 1, it is characterised in that: in described step (6), the fiber type of multimode fibre reflecting mirror standard component is consistent with the fiber type of multimode fibre reflecting mirror to be measured.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106404358A (en) * 2016-11-22 2017-02-15 山东电力设备有限公司 Test device and method for full-fiber current transformer mirror reflectance stability
CN106441818A (en) * 2016-11-22 2017-02-22 山东电力设备有限公司 Device and method for testing reflectivity of all-fiber current transformer reflector
CN114088017A (en) * 2021-11-02 2022-02-25 武汉联胜光电技术有限公司 Device and method for detecting angle and flatness of customized optical fiber end face

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CN1242516A (en) * 1998-07-16 2000-01-26 中国科学院大连化学物理研究所 Method of measuring high specular reflectivity of reflector
US20040091213A1 (en) * 2002-11-08 2004-05-13 Tsung-Kai Chuang Optical calibrating method
CN102128715A (en) * 2010-12-08 2011-07-20 中国科学院光电技术研究所 Method for measuring reflectivity of dual-wavelength high reflecting mirror
CN202057596U (en) * 2011-04-11 2011-11-30 西安超凡光电设备有限公司 Comparison-type reflectivity measuring instrument
CN102607806A (en) * 2012-02-23 2012-07-25 科纳技术(苏州)有限公司 System for detecting reflectivity of plane mirror
CN105043722A (en) * 2015-07-28 2015-11-11 哈尔滨工程大学 Reflector reflectivity measuring method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1242516A (en) * 1998-07-16 2000-01-26 中国科学院大连化学物理研究所 Method of measuring high specular reflectivity of reflector
US20040091213A1 (en) * 2002-11-08 2004-05-13 Tsung-Kai Chuang Optical calibrating method
CN102128715A (en) * 2010-12-08 2011-07-20 中国科学院光电技术研究所 Method for measuring reflectivity of dual-wavelength high reflecting mirror
CN202057596U (en) * 2011-04-11 2011-11-30 西安超凡光电设备有限公司 Comparison-type reflectivity measuring instrument
CN102607806A (en) * 2012-02-23 2012-07-25 科纳技术(苏州)有限公司 System for detecting reflectivity of plane mirror
CN105043722A (en) * 2015-07-28 2015-11-11 哈尔滨工程大学 Reflector reflectivity measuring method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106404358A (en) * 2016-11-22 2017-02-15 山东电力设备有限公司 Test device and method for full-fiber current transformer mirror reflectance stability
CN106441818A (en) * 2016-11-22 2017-02-22 山东电力设备有限公司 Device and method for testing reflectivity of all-fiber current transformer reflector
CN106404358B (en) * 2016-11-22 2019-02-22 山东电力设备有限公司 A kind of test method of all-fiber current transformator reflectance of reflector stability
CN106441818B (en) * 2016-11-22 2019-03-29 山东电力设备有限公司 A kind of test method of all-fiber current transformator reflectance of reflector
CN114088017A (en) * 2021-11-02 2022-02-25 武汉联胜光电技术有限公司 Device and method for detecting angle and flatness of customized optical fiber end face

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