JPS56150732A - Optical psk homodyne detecting and receiving device - Google Patents

Optical psk homodyne detecting and receiving device

Info

Publication number
JPS56150732A
JPS56150732A JP5400580A JP5400580A JPS56150732A JP S56150732 A JPS56150732 A JP S56150732A JP 5400580 A JP5400580 A JP 5400580A JP 5400580 A JP5400580 A JP 5400580A JP S56150732 A JPS56150732 A JP S56150732A
Authority
JP
Japan
Prior art keywords
light
signal
input signal
optical
square detector
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
JP5400580A
Other languages
Japanese (ja)
Other versions
JPH0158493B2 (en
Inventor
Soichi Kobayashi
Junichi Yamada
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 JP5400580A priority Critical patent/JPS56150732A/en
Publication of JPS56150732A publication Critical patent/JPS56150732A/en
Publication of JPH0158493B2 publication Critical patent/JPH0158493B2/ja
Granted 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
    • 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
    • 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
    • H04B10/61—Coherent receivers
    • H04B10/63—Homodyne, i.e. coherent receivers where the local oscillator is locked in frequency and phase to the carrier signal

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)

Abstract

PURPOSE:To allow the constant output of a local oscillator to follow up the frequency and phase fluctuations of light input signal at all times by constituting an optical PSK homodyne detecting and receiving device with the local oscillator synchronized to the frequency and phase of the entered light input signal, etc. CONSTITUTION:The signal PSK modulated from the input signal obtained at an input terminal 1 is separated and is divided to signals 3, 4, by a half mirror 2. The signal light 4 passes through a half mirror 5 and enters a square detector 6, whilist the light 19 out from a VCO7 reflects on the mirror 5, is combined with the signal light 4, and is simultaneously entered to the square detector 6. If the light 19 coincides with the carrier of the input signal of the input terminal 1, the output base band signal 17 can be directly taken out from the square detector 6. Namely, this is the constitution of obtaining the locally transmitted light by operating the optical VCO7 by the use of the reverse modulation type homodyne detection system in order to make the sufficient optical reference phase carrier.
JP5400580A 1980-04-23 1980-04-23 Optical psk homodyne detecting and receiving device Granted JPS56150732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5400580A JPS56150732A (en) 1980-04-23 1980-04-23 Optical psk homodyne detecting and receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5400580A JPS56150732A (en) 1980-04-23 1980-04-23 Optical psk homodyne detecting and receiving device

Publications (2)

Publication Number Publication Date
JPS56150732A true JPS56150732A (en) 1981-11-21
JPH0158493B2 JPH0158493B2 (en) 1989-12-12

Family

ID=12958464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5400580A Granted JPS56150732A (en) 1980-04-23 1980-04-23 Optical psk homodyne detecting and receiving device

Country Status (1)

Country Link
JP (1) JPS56150732A (en)

Also Published As

Publication number Publication date
JPH0158493B2 (en) 1989-12-12

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