AU2001242189A1 - Method and apparatus for measuring phase differences between intensity-modulatedoptical signals - Google Patents

Method and apparatus for measuring phase differences between intensity-modulatedoptical signals

Info

Publication number
AU2001242189A1
AU2001242189A1 AU2001242189A AU4218901A AU2001242189A1 AU 2001242189 A1 AU2001242189 A1 AU 2001242189A1 AU 2001242189 A AU2001242189 A AU 2001242189A AU 4218901 A AU4218901 A AU 4218901A AU 2001242189 A1 AU2001242189 A1 AU 2001242189A1
Authority
AU
Australia
Prior art keywords
optical signals
phase differences
signals
differences
amplitudes
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.)
Abandoned
Application number
AU2001242189A
Inventor
Francois Babin
Normand Cyr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Exfo Electro Optical Engineering Inc
Original Assignee
Exfo Electro Optical Engineering Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Exfo Electro Optical Engineering Inc filed Critical Exfo Electro Optical Engineering Inc
Publication of AU2001242189A1 publication Critical patent/AU2001242189A1/en
Abandoned legal-status Critical Current

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
    • G01M11/33—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
    • G01M11/333—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 modulated input signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
    • G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
    • 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
    • G01M11/338—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 by measuring dispersion other than PMD, e.g. chromatic dispersion

Abstract

In order to avoid errors inherent in the measurement of electrical phase differences or pulse arrival time in relative group delay measurements, different optical signals have their intensity modulated at a common high frequency and different permutations are selected. The amplitudes of corresponding electrical signals are detected and phase differences are computed on the basis of trigonometrical relationships. Because the modulation frequency is known, time differences can be deduced. Apparatus for measuring the phase differences conveniently comprises a slotted wheel which passes selected ones or both of the optical signals. One of the optical signals may be split to produce a third signal with a predetermined phase shift, e.g. about 90 degrees at the modulation frequency and the amplitudes of some possible permutations of the three optical signals used to compute the phase difference. The measurements may be used to compute chromatic dispersion, polarization mode dispersion, elongation, and so on.
AU2001242189A 2000-03-31 2001-03-30 Method and apparatus for measuring phase differences between intensity-modulatedoptical signals Abandoned AU2001242189A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2303602 2000-03-31
CA002303602A CA2303602C (en) 2000-03-31 2000-03-31 Method and apparatus for measuring phase differences between intensity-modulated optical signals
PCT/CA2001/000409 WO2001075407A1 (en) 2000-03-31 2001-03-30 Method and apparatus for measuring phase differences between intensity-modulated optical signals

Publications (1)

Publication Number Publication Date
AU2001242189A1 true AU2001242189A1 (en) 2001-10-15

Family

ID=4165746

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001242189A Abandoned AU2001242189A1 (en) 2000-03-31 2001-03-30 Method and apparatus for measuring phase differences between intensity-modulatedoptical signals

Country Status (7)

Country Link
EP (1) EP1272824B1 (en)
CN (1) CN100395527C (en)
AT (1) ATE277340T1 (en)
AU (1) AU2001242189A1 (en)
CA (1) CA2303602C (en)
DE (1) DE60105791T2 (en)
WO (1) WO2001075407A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001337008A (en) * 2000-05-30 2001-12-07 Advantest Corp Polarization mode scattering measuring device, method and recording medium
ATE363774T1 (en) * 2005-02-01 2007-06-15 Alcatel Lucent OPTICAL TRANSMITTER AND METHOD FOR MODULATING AN OPTICAL SIGNAL
DE102006004019B3 (en) * 2006-01-27 2007-03-08 Audi Ag Photonic mixer device-system, for motor vehicle, has modulation unit producing modulation signal, whose phasing is individually changed for transmission units such that distance values of object are determined with each transmission unit
WO2012053499A1 (en) * 2010-10-18 2012-04-26 株式会社フジクラ Wavelength dispersion measuring device and wavelength dispersion measuring method using same
CN103292914B (en) * 2013-05-11 2015-10-07 哈尔滨工业大学 Based on the photelectric receiver time stability method of testing of double-frequency laser without inclined light splitting
EP3120473B1 (en) * 2014-03-20 2021-04-07 Ariel-University Research and Development Company Ltd. Method and system for controlling phase of a signal
CN113466840B (en) * 2020-03-30 2022-09-20 阿里巴巴集团控股有限公司 Distance measurement method, positioning method, device, equipment and system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4750833A (en) * 1985-12-03 1988-06-14 Princeton Applied Research Corp. Fiber optic dispersion method and apparatus
US4799789A (en) * 1987-02-27 1989-01-24 Anritsu Corporation Chromatic dispersion measuring system for optical fibers
DE4018379A1 (en) * 1990-06-08 1991-12-12 Rainer Dr Casdorff Continuously determining actual path length in optical fibre - deriving measurement signal as function of phase difference between modulation and photodiode signals
DE19726931A1 (en) * 1997-06-25 1999-01-07 Univ Schiller Jena Interferometric method to measure phase difference between superimposed optical waves

Also Published As

Publication number Publication date
CA2303602C (en) 2010-01-12
DE60105791D1 (en) 2004-10-28
CN1430724A (en) 2003-07-16
DE60105791T2 (en) 2005-07-14
WO2001075407A1 (en) 2001-10-11
EP1272824B1 (en) 2004-09-22
CA2303602A1 (en) 2001-09-30
EP1272824A1 (en) 2003-01-08
ATE277340T1 (en) 2004-10-15
CN100395527C (en) 2008-06-18

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