JPS57190387A - Wavelength sweeping laser device - Google Patents

Wavelength sweeping laser device

Info

Publication number
JPS57190387A
JPS57190387A JP7588281A JP7588281A JPS57190387A JP S57190387 A JPS57190387 A JP S57190387A JP 7588281 A JP7588281 A JP 7588281A JP 7588281 A JP7588281 A JP 7588281A JP S57190387 A JPS57190387 A JP S57190387A
Authority
JP
Japan
Prior art keywords
wavelength
optical path
laser beam
optical
photosensor
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.)
Pending
Application number
JP7588281A
Other languages
Japanese (ja)
Inventor
Naoto Mogi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7588281A priority Critical patent/JPS57190387A/en
Publication of JPS57190387A publication Critical patent/JPS57190387A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  by interference
    • G02F1/225—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  by interference in an optical waveguide structure
    • G02F1/2252—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  by interference in an optical waveguide structure in optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To increase the accuracy in detection of the beat frequency for the titled device by a method wherein, in the case of a laser oscillator with which wavelength sweeping can be performed, the wavelength is stabilized during the first period in the first and the second periods which will be repeated alternately, the wavelength sweeping is controlled in the second period and the above is led to a plurality of optical paths, and the laser beam which propagates at least one optical path is delayed. CONSTITUTION:The laser beam sent from the laser oscillator 1 which will be controlled by a wavelength control circuit 2, is composed using the optical paths A and B consisting of optical fiber, and the above is sent to a photosensor 4. In this constitution, a photosensor 5, consisting of a narrow bandwidth optical filter whereon passing center wavelength will be changed due to the external factors such as pressure, temperature and the like, is provided on the optical path A, and on the other optical path B, a loop-shaped delaying device 6 is inserted and its optical path length is made longer than that of the optical path A. Accordingly, the relative relations between the wavelength-fixed laser beam and the wavelength-sweeped laser beam are always maintained constant, thereby enabling to improve the accuracy in detection of the beat frequency.
JP7588281A 1981-05-20 1981-05-20 Wavelength sweeping laser device Pending JPS57190387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7588281A JPS57190387A (en) 1981-05-20 1981-05-20 Wavelength sweeping laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7588281A JPS57190387A (en) 1981-05-20 1981-05-20 Wavelength sweeping laser device

Publications (1)

Publication Number Publication Date
JPS57190387A true JPS57190387A (en) 1982-11-22

Family

ID=13589094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7588281A Pending JPS57190387A (en) 1981-05-20 1981-05-20 Wavelength sweeping laser device

Country Status (1)

Country Link
JP (1) JPS57190387A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63318788A (en) * 1987-06-22 1988-12-27 Matsushita Electric Ind Co Ltd Semiconductor laser oscillation frequency stabilizer
EP1322006A1 (en) * 2001-12-21 2003-06-25 Agilent Technologies, Inc. (a Delaware corporation) Apparatus for detecting wavelength drift and method therefor
EP1324516A2 (en) * 2001-12-21 2003-07-02 Agilent Technologies, Inc. (a Delaware corporation) Apparatus for detecting cross-talk and method therefor
EP2128561A1 (en) * 2008-05-28 2009-12-02 Leica Geosystems AG Interferometric distance measuring method with delayed chirp signal and such a device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63318788A (en) * 1987-06-22 1988-12-27 Matsushita Electric Ind Co Ltd Semiconductor laser oscillation frequency stabilizer
EP1322006A1 (en) * 2001-12-21 2003-06-25 Agilent Technologies, Inc. (a Delaware corporation) Apparatus for detecting wavelength drift and method therefor
EP1324516A2 (en) * 2001-12-21 2003-07-02 Agilent Technologies, Inc. (a Delaware corporation) Apparatus for detecting cross-talk and method therefor
EP1324516A3 (en) * 2001-12-21 2003-08-20 Agilent Technologies, Inc. (a Delaware corporation) Apparatus for detecting cross-talk and method therefor
US6919963B2 (en) 2001-12-21 2005-07-19 Agilent Technologies, Inc. Apparatus for detecting wavelength drift and method therefor
US6961128B2 (en) 2001-12-21 2005-11-01 Agilent Technologies, Inc. Apparatus for detecting cross-talk and method therefor
EP2128561A1 (en) * 2008-05-28 2009-12-02 Leica Geosystems AG Interferometric distance measuring method with delayed chirp signal and such a device
WO2010000044A2 (en) * 2008-05-28 2010-01-07 Leica Geosystems Ag Interferometric distance-measuring method with delayed chirp signal and such an apparatus
WO2010000044A3 (en) * 2008-05-28 2010-03-25 Leica Geosystems Ag Interferometric distance-measuring method with delayed chirp signal and such an apparatus
US20110051146A1 (en) * 2008-05-28 2011-03-03 Leica Geosystems Ag Interferometric distance-measuring method with delayed chirp signal and such an apparatus
US8654342B2 (en) 2008-05-28 2014-02-18 Leica Geosystems Ag Interferometric distance-measuring method with delayed chirp signal and such an apparatus

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