WO2000062033A1 - Apparatus for measuring the properties of an optical fiber - Google Patents
Apparatus for measuring the properties of an optical fiber Download PDFInfo
- Publication number
- WO2000062033A1 WO2000062033A1 PCT/US2000/007900 US0007900W WO0062033A1 WO 2000062033 A1 WO2000062033 A1 WO 2000062033A1 US 0007900 W US0007900 W US 0007900W WO 0062033 A1 WO0062033 A1 WO 0062033A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch
- fiber
- light
- optically coupled
- optical
- Prior art date
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
- G01M11/02—Testing optical properties
-
- 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
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3127—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using multiple or wavelength variable input source
-
- 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
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
- G01M11/335—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face using two or more input wavelengths
Definitions
- the present invention relates generally to an apparatus for measuring optical properties of waveguide fiber, and particularly to an apparatus that employs optical switching of light sources or detectors.
- Waveguide fiber optical measurements have always been a costly part of the manufacturing process. This is particularly true of multimode fiber measurements that include bandwidth, attenuation, numerical aperture, core diameter, and differential mode delay.
- Traditional optical measurement systems have used optics benches and bulk optic components consisting of lenses and movable mirrors to fold optical paths and to combine signals for the various measurements.
- One connection to the test fiber is established using an XYZ translation stage in front of a final lens before the detector. Translation stages are known to be temperature sensitive and subject to backlash in their movable parts.
- the connection at the light launch end of the fiber is made to a source of light appropriate for the desired measurement.
- the multimode fiber optical properties viz., bandwidth and attenuation
- bandwidth and attenuation are launch sensitive
- measurements using more than one launch condition are desired.
- measurements at more than one wavelength are usually desired so that the launch end connection may have to be made numerous times.
- standard optical specifications for multimode fiber performance criteria include measurements made using a launch condition having a spot size and numerical aperture which excites all of the modes of the multimode waveguide fiber.
- This launch condition is called the overfilled condition and is defined in the industry standards Fiber Optic Test Procedure (FOTP) 54.
- Attenuation measurements are made using a limited or restricted launch, referred to as Limited Phase Space Launch (LPS) and defined in FOTP 50.
- LPS Limited Phase Space Launch
- the LPS launch is similar to the 30 urn spot size launch described below.
- One aspect of the present invention is an apparatus for measuring optical waveguide fiber that makes use of an N X 1 optical switch at the launch end of the fiber under test and a 1 X M optical switch at the detector end of the fiber under test.
- the light sources having the desired wavelengths and launch conditions, i.e., spot size and numerical aperture, are each connected to one of the N ports of the N X 1 switch.
- the detectors are each connected to one of the M ports of the M X1 switch. The result is, the fiber may be connected between the two switches and remain connected while all of the desired measurements are made.
- the launch end switch is selected to preserve the launch conditions, i.e., the mode power distribution, of the sources.
- the detector end switch is selected to preserve the mode power distribution of the light exiting the fiber under test.
- a reference fiber is first connected between the switches to establish, for example a baseline launch power or launch pulse width.
- the pulse width of a pulse passing through the fiber under test is compared to the reference pulse width.
- the same comparison is made for the attenuation measurements, except that in this measurement the power exiting the fiber under test is compared to the launched power.
- the spot size or numerical aperture of the launched light varies from one light to another source.
- certain of the sources are single mode lasers.
- the single mode laser sources have a spot size in the range of about 8 ⁇ m to 30 ⁇ m.
- either the spot size or the numerical aperture of the launched light may be restricted so that not all modes of a multimode fiber carry power, that is, are excited.
- a further embodiment of the measurement apparatus includes an OTDR coupled to the switches via a 1 X 2 coupler so that a trace of reflected power can be made of light launched into each end of the fiber.
- Figure 1 is a schematic of an embodiment of the invented waveguide fiber measurement apparatus.
- FIG. 1 An exemplary embodiment of the measurement apparatus of the present invention is shown in Figure 1 , and is designated generally throughout by reference numeral 10.
- the present invention for an apparatus to measure waveguide fiber includes an N X 1 switch 2 for launching power into the fiber under test.
- each of light sources 4 are optically coupled through 1 X 2 connector 12 to one of the N input ports of the N X 1 switch.
- a second optical connection is made through switch 12 to the output end of the 1 X M switch, 8. This arrangement allows one to obtain an OTDR trace from each end of the fiber under test.
- DMD differential mode dispersion
- the fiber may be optically connected into the measurement apparatus 10 by means of splices 18. These may be fusion splices or any one of the many mechanical splices known in the art.
- Variable attenuator 20 may be placed in the circuit for use in cases where the launched light power is too high for the detectors 22. Overdriving the detectors is most likely to occur when acquiring the reference light signal mentioned above.
- Switch 24 is positioned to send light power from the detector in use to data storage and analysis means 26.
- the analysis and storage means include an oscilloscope and a computer having an analogue to digital interface.
- a very restricted launch condition of spot size about 9.3 ⁇ m and numerical aperture (NA) about 0.14 may be achieved using a standard step index single-mode fiber as optical fiber pigtail 28 at one input port of switch 2.
- a plurality of restricted launches may then be achieved by using the standard single mode fiber in conjunction with a multimode fiber under test and offsetting the single mode fiber core relative to the multimode fiber core.
- Moderately restricted launch conditions can be achieved using as pigtail 28 a 50 ⁇ m core multimode fiber wrapped about a mandrel. Five turns of such fiber wrapped around a 5 mm diameter mandrel provided a spot size (diameter) of 30 urn and a numerical aperture of 0.13. An over filled launch was achieved using as pigtail 28 a step index multimode fiber having a core diameter greater than about 100 urn and a numerical aperture greater than about 0.30.
- Switch 2 was a JDS, DP8T switch PN: SC1618-D2SP SN: B6B0366. Testing was repeated using as switch 2 the respective JDS switches, 1x2 switch PN: SW12-Z000311 SN: JC034991 , and 1x8 switch PN: SB0108-
- Variable attenuator 20 was a JDS, PN: HA9-Z046 SN: KC000660.
- Four different launch conditions were used to measure bandwidth of a 62.5 micron core, 125 ⁇ m outside diameter fiber. These were as described above: • a standard overfilled defined by TIA/EIA FOTP ;
- Results of the test are set forth in Table 1.
- the percent difference of the bandwidth measurement from that made on a reference bench are given for each launch condition and each switch type.
- the percent difference in bandwidth measurement caused by the variable attenuator is given in the last row of Table 1.
- the percent differences are presented as BW850 nm/BW1300 nm. Measurements at 1300 nm wavelength were not made using the single mode fiber (SMF) launch.
- SMF single mode fiber
- Attenuator The impact of the attenuator at the end of the system was shown to be quite small, less than 5% in all cases. Most switches show a low percent difference, especially in the case of the overfilled launch.
- the invention provides a way of combining sources at multiple wavelengths and with multiple launch conditions through a fiber optic switch, thus eliminating the need for open air, bulk optical components.
- This provides the means for making a multimode fiber bandwidth measurement whereby a test fiber must undergo one connection to the test apparatus for a complete measurement under all permutations of these conditions.
- the invention also provides a means of combining multiple optical measurements using fiber optic switch technology.
- multiple measurements can be performed. For example, an optical time domain reflectometer (OTDR) or differential mode delay (DMD) measurement can be combined with bandwidth and attenuation by connecting them to additional ports of the switches.
- OTDR optical time domain reflectometer
- DMD differential mode delay
- This design eliminates the optical bench and utilizes a single electronic equipment rack for the components.
- One connection then provides means to switch in the various launch conditions, various wavelengths and various measurements without the need for open air optics.
- the dynamic range is known in the art to be the amount of attenuation which can be placed in a measurement path while retaining a signal to noise ratio that allows a measurement to be made.
- Dynamic range of a measurement system thus translates directly into the length of fiber which can be measured.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00928128A EP1166075A1 (en) | 1999-04-09 | 2000-03-23 | Apparatus for measuring the properties of an optical fiber |
MXPA01010149A MXPA01010149A (es) | 1999-04-09 | 2000-03-23 | Aparato para medir las propiedades de una fibra optica. |
JP2000611047A JP2002541474A (ja) | 1999-04-09 | 2000-03-23 | 光ファイバ特性測定装置 |
BR0009406-4A BR0009406A (pt) | 1999-04-09 | 2000-03-23 | Aparelho para medição das propriedades de uma fibra ótica |
CA002369006A CA2369006A1 (en) | 1999-04-09 | 2000-03-23 | Apparatus for measuring the properties of an optical fiber |
AU46409/00A AU4640900A (en) | 1999-04-09 | 2000-03-23 | Apparatus for measuring the properties of an optical fiber |
KR1020017012847A KR20020021085A (ko) | 1999-04-09 | 2000-03-23 | 광섬유의 특성 측정 장치 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12850499P | 1999-04-09 | 1999-04-09 | |
US60/128,504 | 1999-04-09 | ||
US12970699P | 1999-04-16 | 1999-04-16 | |
US60/129,706 | 1999-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000062033A1 true WO2000062033A1 (en) | 2000-10-19 |
Family
ID=26826651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/007900 WO2000062033A1 (en) | 1999-04-09 | 2000-03-23 | Apparatus for measuring the properties of an optical fiber |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1166075A1 (zh) |
JP (1) | JP2002541474A (zh) |
KR (1) | KR20020021085A (zh) |
CN (1) | CN1360676A (zh) |
AU (1) | AU4640900A (zh) |
BR (1) | BR0009406A (zh) |
CA (1) | CA2369006A1 (zh) |
MX (1) | MXPA01010149A (zh) |
WO (1) | WO2000062033A1 (zh) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1898537A1 (de) * | 2006-09-07 | 2008-03-12 | Phoenix Contact GmbH & Co. KG | Diagnoseverfahren und Diagnosechip zur Bandbreitenbestimmung optischer Fasern |
FR2945637A1 (fr) * | 2009-05-18 | 2010-11-19 | Univ Rennes | Procede et systeme d'observation de modes transverses d'un guide optique. |
CN102393220A (zh) * | 2011-10-18 | 2012-03-28 | 哈尔滨工程大学 | 一种sms光纤结构复用传感器 |
CN103226056A (zh) * | 2012-01-31 | 2013-07-31 | 弗兰克公司 | 利用阵列连接器的拓扑现场测试器和利用阵列连接器的拓扑多波长现场测试器 |
US10241003B2 (en) | 2016-01-18 | 2019-03-26 | Draka Comteq B.V. | Method of measuring time delays with respect to differential mode delay (DMD) of a multi-mode fiber (MMF) or a few-mode fiber (FMF) |
US10584982B2 (en) | 2016-01-20 | 2020-03-10 | Fotech Group Limited | Distributed optical fibre sensors |
CN112924142A (zh) * | 2021-01-25 | 2021-06-08 | 杨翠兰 | 基于光反射原理实现光线折射处检测的光纤检测设备 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030035197A (ko) * | 2001-10-30 | 2003-05-09 | 엘지전선 주식회사 | 기가비트 이더넷 시스템에서 다중모드 광섬유의 전송거리측정방법 |
KR100444268B1 (ko) * | 2002-06-05 | 2004-08-12 | 주식회사 한택 | 평면배열형 수광 소자를 이용한 광 측정 장치 및 방법 |
US7817257B2 (en) | 2004-01-27 | 2010-10-19 | Fujikura Ltd. | Method for measuring a differential mode delay of a multimode optical fiber |
JP4825430B2 (ja) * | 2005-02-22 | 2011-11-30 | 信越化学工業株式会社 | 光ファイバ母材のコア部非円率測定方法。 |
CN101435738B (zh) * | 2007-11-12 | 2011-03-23 | 鸿富锦精密工业(深圳)有限公司 | 测试装置 |
US8294130B2 (en) * | 2010-06-11 | 2012-10-23 | Corning Incorporated | Methods and systems for optimizing the alignment of optical packages |
NL2007976C2 (en) * | 2011-12-15 | 2013-06-18 | Draka Comteq Bv | A method for the characterization of optical properties of an optical fiber. |
CN102798515B (zh) * | 2012-08-17 | 2015-08-12 | 重庆大学 | 灯具空间光谱分布快速测量装置与方法 |
KR101517032B1 (ko) * | 2013-11-18 | 2015-05-04 | 삼현컴텍(주) | 광채널스위치를 포함하는 온도 측정시스템 |
US9900087B2 (en) * | 2015-09-21 | 2018-02-20 | Exfo Inc. | Multimode launch systems for use in performing an OTDR measurement on a multi-fiber array DUT and method of performing same |
CN110441030B (zh) * | 2019-07-24 | 2021-05-11 | 武汉光迅科技股份有限公司 | 一种平面波导类器件的通道对准***及通道对准方法 |
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US4304489A (en) * | 1979-05-17 | 1981-12-08 | Kokusai Denshin Denwa Co., Ltd. | System for measuring an optical loss in a single mode optical fiber |
JPS5730925A (en) * | 1980-08-04 | 1982-02-19 | Nippon Telegr & Teleph Corp <Ntt> | Device for measuring optical cable transmission characteristics |
JPS62145133A (ja) * | 1985-12-20 | 1987-06-29 | Fujitsu Ltd | 光減衰装置 |
US5319482A (en) * | 1991-02-12 | 1994-06-07 | Nippon Telegraph And Telephone Corporation | Optical loop back and line test apparatus |
EP0690298A2 (en) * | 1994-06-29 | 1996-01-03 | Corning Incorporated | Optical waveguide spectral attenuation using an OTDR |
JPH0933391A (ja) * | 1995-07-18 | 1997-02-07 | Sumitomo Electric Ind Ltd | 光スイッチの光学特性の測定方法とその測定装置 |
EP0782290A2 (en) * | 1990-01-19 | 1997-07-02 | Canon Kabushiki Kaisha | Optical communication method and optical communication system |
WO1998014766A1 (en) * | 1996-10-01 | 1998-04-09 | Cary Bloom | Apparatus and method for testing optical fiber system components |
EP0855587A2 (en) * | 1997-01-27 | 1998-07-29 | Sumitomo Electric Industries, Ltd. | Wavelenght-variable light source and OTDR apparatus |
-
2000
- 2000-03-23 AU AU46409/00A patent/AU4640900A/en not_active Abandoned
- 2000-03-23 MX MXPA01010149A patent/MXPA01010149A/es unknown
- 2000-03-23 CA CA002369006A patent/CA2369006A1/en not_active Abandoned
- 2000-03-23 CN CN00810209A patent/CN1360676A/zh active Pending
- 2000-03-23 KR KR1020017012847A patent/KR20020021085A/ko not_active Application Discontinuation
- 2000-03-23 EP EP00928128A patent/EP1166075A1/en not_active Withdrawn
- 2000-03-23 WO PCT/US2000/007900 patent/WO2000062033A1/en not_active Application Discontinuation
- 2000-03-23 JP JP2000611047A patent/JP2002541474A/ja active Pending
- 2000-03-23 BR BR0009406-4A patent/BR0009406A/pt not_active Application Discontinuation
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US4304489A (en) * | 1979-05-17 | 1981-12-08 | Kokusai Denshin Denwa Co., Ltd. | System for measuring an optical loss in a single mode optical fiber |
JPS5730925A (en) * | 1980-08-04 | 1982-02-19 | Nippon Telegr & Teleph Corp <Ntt> | Device for measuring optical cable transmission characteristics |
JPS62145133A (ja) * | 1985-12-20 | 1987-06-29 | Fujitsu Ltd | 光減衰装置 |
EP0782290A2 (en) * | 1990-01-19 | 1997-07-02 | Canon Kabushiki Kaisha | Optical communication method and optical communication system |
US5319482A (en) * | 1991-02-12 | 1994-06-07 | Nippon Telegraph And Telephone Corporation | Optical loop back and line test apparatus |
EP0690298A2 (en) * | 1994-06-29 | 1996-01-03 | Corning Incorporated | Optical waveguide spectral attenuation using an OTDR |
JPH0933391A (ja) * | 1995-07-18 | 1997-02-07 | Sumitomo Electric Ind Ltd | 光スイッチの光学特性の測定方法とその測定装置 |
WO1998014766A1 (en) * | 1996-10-01 | 1998-04-09 | Cary Bloom | Apparatus and method for testing optical fiber system components |
EP0855587A2 (en) * | 1997-01-27 | 1998-07-29 | Sumitomo Electric Industries, Ltd. | Wavelenght-variable light source and OTDR apparatus |
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PATENT ABSTRACTS OF JAPAN vol. 011, no. 375 (P - 644) 8 December 1987 (1987-12-08) * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 06 30 June 1997 (1997-06-30) * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1898537A1 (de) * | 2006-09-07 | 2008-03-12 | Phoenix Contact GmbH & Co. KG | Diagnoseverfahren und Diagnosechip zur Bandbreitenbestimmung optischer Fasern |
US7945159B2 (en) | 2006-09-07 | 2011-05-17 | Phoenix Contact Gmbh & Co. Kg | Diagnostic method and diagnostic chip for determining the bandwidth of optical fibers |
FR2945637A1 (fr) * | 2009-05-18 | 2010-11-19 | Univ Rennes | Procede et systeme d'observation de modes transverses d'un guide optique. |
WO2010133488A1 (fr) * | 2009-05-18 | 2010-11-25 | Universite De Rennes 1 | Procédé et système d'observation de modes transverses d'un guide optique |
CN102393220A (zh) * | 2011-10-18 | 2012-03-28 | 哈尔滨工程大学 | 一种sms光纤结构复用传感器 |
CN103226056A (zh) * | 2012-01-31 | 2013-07-31 | 弗兰克公司 | 利用阵列连接器的拓扑现场测试器和利用阵列连接器的拓扑多波长现场测试器 |
EP2623948A1 (en) * | 2012-01-31 | 2013-08-07 | Fluke Corporation | Field tester for topologies utilizing array connectors and multi-wavelength field tester for topologies utilizing array connectors |
US10241003B2 (en) | 2016-01-18 | 2019-03-26 | Draka Comteq B.V. | Method of measuring time delays with respect to differential mode delay (DMD) of a multi-mode fiber (MMF) or a few-mode fiber (FMF) |
US10584982B2 (en) | 2016-01-20 | 2020-03-10 | Fotech Group Limited | Distributed optical fibre sensors |
US11015961B2 (en) | 2016-01-20 | 2021-05-25 | Fotech Group Limited | Distributed optical fibre sensors |
CN112924142A (zh) * | 2021-01-25 | 2021-06-08 | 杨翠兰 | 基于光反射原理实现光线折射处检测的光纤检测设备 |
Also Published As
Publication number | Publication date |
---|---|
MXPA01010149A (es) | 2002-06-04 |
EP1166075A1 (en) | 2002-01-02 |
CN1360676A (zh) | 2002-07-24 |
BR0009406A (pt) | 2003-03-05 |
JP2002541474A (ja) | 2002-12-03 |
CA2369006A1 (en) | 2000-10-19 |
AU4640900A (en) | 2000-11-14 |
KR20020021085A (ko) | 2002-03-18 |
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