JPS56150731A - Optical polarization matching and combining device - Google Patents

Optical polarization matching and combining device

Info

Publication number
JPS56150731A
JPS56150731A JP5299480A JP5299480A JPS56150731A JP S56150731 A JPS56150731 A JP S56150731A JP 5299480 A JP5299480 A JP 5299480A JP 5299480 A JP5299480 A JP 5299480A JP S56150731 A JPS56150731 A JP S56150731A
Authority
JP
Japan
Prior art keywords
signal light
wavelength plate
analyzer
emitted light
locally emitted
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.)
Granted
Application number
JP5299480A
Other languages
Japanese (ja)
Other versions
JPS6147403B2 (en
Inventor
Nobuyuki Imoto
Yoshihisa Yamamoto
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5299480A priority Critical patent/JPS56150731A/en
Publication of JPS56150731A publication Critical patent/JPS56150731A/en
Publication of JPS6147403B2 publication Critical patent/JPS6147403B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • 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
    • G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
    • G02F2/002—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light using optical mixing

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

PURPOSE:To combine signal light and locally emitted light and maximize detection efficiency by detecting the polarization states of the signal light and the locally emitted light or the difference between these and controlling an electrooptic crystal phase plate in the state when both coincide. CONSTITUTION:Signal light Es is partly taken out for the purpose of polarization direction detection by a 10dB semitransparent mirror 1 and after passing an analyzer 2, it is measured of its intensity with a photodetector 3 and depending upon the intensity output thereof, a servomotor 4 is controlled so that the analyzer 2 is rotated in the direction where the intensity output is maximized. The analyzer 2 and the 1/4 wavelength plate 5 on the locally emitted light side are interlocked, and the axis of the signal light and the axis of the 1/4 wavelength plate 5 are in alignment. The locally emitted light EL is rotated of its polarization direction by a 1/2 wavelength plate 6, and is combined to the signal light by a semitransparent mirror 7. The heterodyne detection output by a photodetector 8 controls a servomotor 9 coupled to the 1/2 wavelength plate 6.
JP5299480A 1980-04-23 1980-04-23 Optical polarization matching and combining device Granted JPS56150731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5299480A JPS56150731A (en) 1980-04-23 1980-04-23 Optical polarization matching and combining device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5299480A JPS56150731A (en) 1980-04-23 1980-04-23 Optical polarization matching and combining device

Publications (2)

Publication Number Publication Date
JPS56150731A true JPS56150731A (en) 1981-11-21
JPS6147403B2 JPS6147403B2 (en) 1986-10-18

Family

ID=12930471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5299480A Granted JPS56150731A (en) 1980-04-23 1980-04-23 Optical polarization matching and combining device

Country Status (1)

Country Link
JP (1) JPS56150731A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760770U (en) * 1980-09-26 1982-04-10
JPS5913434A (en) * 1982-07-14 1984-01-24 Nec Corp Method of optical heterodyne detection
JPS60121424A (en) * 1983-12-05 1985-06-28 Nippon Telegr & Teleph Corp <Ntt> Optical receiver
JPS61153616A (en) * 1984-12-27 1986-07-12 Kokusai Denshin Denwa Co Ltd <Kdd> Polarization matching device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62237117A (en) * 1986-04-07 1987-10-17 Ngk Spark Plug Co Ltd Rotary power transmitting mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
APPLIEO OPTICS=1975 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760770U (en) * 1980-09-26 1982-04-10
JPS5736367Y2 (en) * 1980-09-26 1982-08-11
JPS5913434A (en) * 1982-07-14 1984-01-24 Nec Corp Method of optical heterodyne detection
JPS60121424A (en) * 1983-12-05 1985-06-28 Nippon Telegr & Teleph Corp <Ntt> Optical receiver
JPS61153616A (en) * 1984-12-27 1986-07-12 Kokusai Denshin Denwa Co Ltd <Kdd> Polarization matching device

Also Published As

Publication number Publication date
JPS6147403B2 (en) 1986-10-18

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