JPS56150734A - Heterodyne receiver for optical communication using semiconductor laser - Google Patents

Heterodyne receiver for optical communication using semiconductor laser

Info

Publication number
JPS56150734A
JPS56150734A JP5400780A JP5400780A JPS56150734A JP S56150734 A JPS56150734 A JP S56150734A JP 5400780 A JP5400780 A JP 5400780A JP 5400780 A JP5400780 A JP 5400780A JP S56150734 A JPS56150734 A JP S56150734A
Authority
JP
Japan
Prior art keywords
semiconductor laser
intermediate frequency
signal
local oscillator
frequency
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
JP5400780A
Other languages
Japanese (ja)
Other versions
JPS6143692B2 (en
Inventor
Soichi Kobayashi
Shigeru Saito
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 JP5400780A priority Critical patent/JPS56150734A/en
Publication of JPS56150734A publication Critical patent/JPS56150734A/en
Publication of JPS6143692B2 publication Critical patent/JPS6143692B2/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)

Abstract

PURPOSE:To realize high senitivity and low noise by using a semiconductor laser to a local oscillator, and providing a feedback circuit so as to keep intermediate frequency constant at all times, thereby controlling the temp. of the semiconductor laser. CONSTITUTION:The light signal applied to an input terminal 1 and the light from a local oscillator 2 using a semiconductor laser are applied by a square detector 4, by which an intermediate frequency signal 6 is obtained. One of the signal 6 is conducted to a base band reproducing and detecting circuit, and the other is conducted to a feedback circuit consisting of a mixer 8, a frequency discriminator 10, etc. The circuit 10 which controls the oscillation frequency of the local oscillator 2 so as to obtain always the same intermediate frequency controls the frequency deviated from the intermediate frequency by the signal from the feedback circuit and controls the temp. of the semiconductor laser of the local oscillator 2 thereby correcting the intermediate frequency in such a manner that it is fixed at a desired set value at all times despite the fluctuations in the input signal obtained at the input terminal 1.
JP5400780A 1980-04-23 1980-04-23 Heterodyne receiver for optical communication using semiconductor laser Granted JPS56150734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5400780A JPS56150734A (en) 1980-04-23 1980-04-23 Heterodyne receiver for optical communication using semiconductor laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5400780A JPS56150734A (en) 1980-04-23 1980-04-23 Heterodyne receiver for optical communication using semiconductor laser

Publications (2)

Publication Number Publication Date
JPS56150734A true JPS56150734A (en) 1981-11-21
JPS6143692B2 JPS6143692B2 (en) 1986-09-29

Family

ID=12958521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5400780A Granted JPS56150734A (en) 1980-04-23 1980-04-23 Heterodyne receiver for optical communication using semiconductor laser

Country Status (1)

Country Link
JP (1) JPS56150734A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913434A (en) * 1982-07-14 1984-01-24 Nec Corp Method of optical heterodyne detection
JPS59140736A (en) * 1983-01-31 1984-08-13 Nec Corp Optical heterodyne detection pulse receiving method
JPS59165538A (en) * 1983-03-10 1984-09-18 Nec Corp Optical wave detection receiver
JPS61208327A (en) * 1985-03-07 1986-09-16 エステイーシー・ピーエルシー Balanced coherent light receiver
JPS61219234A (en) * 1985-03-21 1986-09-29 エステイーシー・ピーエルシー Light receiver
US5568305A (en) * 1991-06-20 1996-10-22 Fujitsu Limited Heterodyne receiver provided with a frequency discriminator for coherent lightwave communications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FLECTRONICS LETTERS=1980 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913434A (en) * 1982-07-14 1984-01-24 Nec Corp Method of optical heterodyne detection
JPS59140736A (en) * 1983-01-31 1984-08-13 Nec Corp Optical heterodyne detection pulse receiving method
JPS59165538A (en) * 1983-03-10 1984-09-18 Nec Corp Optical wave detection receiver
JPH0542183B2 (en) * 1983-03-10 1993-06-25 Nippon Electric Co
JPS61208327A (en) * 1985-03-07 1986-09-16 エステイーシー・ピーエルシー Balanced coherent light receiver
JPS61219234A (en) * 1985-03-21 1986-09-29 エステイーシー・ピーエルシー Light receiver
US5568305A (en) * 1991-06-20 1996-10-22 Fujitsu Limited Heterodyne receiver provided with a frequency discriminator for coherent lightwave communications

Also Published As

Publication number Publication date
JPS6143692B2 (en) 1986-09-29

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