JPS6462038A - Optical amplifying repeater - Google Patents

Optical amplifying repeater

Info

Publication number
JPS6462038A
JPS6462038A JP62219430A JP21943087A JPS6462038A JP S6462038 A JPS6462038 A JP S6462038A JP 62219430 A JP62219430 A JP 62219430A JP 21943087 A JP21943087 A JP 21943087A JP S6462038 A JPS6462038 A JP S6462038A
Authority
JP
Japan
Prior art keywords
optical
amplifiers
signal light
amplification gain
amplifier
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
JP62219430A
Other languages
Japanese (ja)
Other versions
JPH0813019B2 (en
Inventor
Takahiro Aoki
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62219430A priority Critical patent/JPH0813019B2/en
Priority to EP88114195A priority patent/EP0305995B1/en
Priority to DE88114195T priority patent/DE3885389T2/en
Priority to US07/239,352 priority patent/US4886334A/en
Publication of JPS6462038A publication Critical patent/JPS6462038A/en
Publication of JPH0813019B2 publication Critical patent/JPH0813019B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/50—Amplifier structures not provided for in groups H01S5/02 - H01S5/30
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
    • H04B10/2914—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing using lumped semiconductor optical amplifiers [SOA]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/0687—Stabilising the frequency of the laser

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To improve reliability for a long term and time stability by branching inputted signal light, supplying each to an input terminal of one of plural optical amplifiers so as to vary the amplifier gain of each optical amplifier in response to a monitored output. CONSTITUTION:A signal light sent from an optical fiber 61 is divided into two equally by a fiber coupler 11 and made incident in semiconductor laser amplifiers 21, 22. Then, the two optical amplifiers 21, 22 are used, amplify the light and synthesize it again and a monitor output is used to control the amplification gain of the optical amplifiers 21, 22. Thus, the level of the output signal after re-synthesis is kept constant by controlling the amplification gain of other optical amplifier even when the amplification gain of an optical amplifier depending on the change in the polarized state of the input signal light or the change in ambient temperature. Thus, the reliability for a long term and the timewise stability are improved.
JP62219430A 1987-09-01 1987-09-01 Optical amplifier repeater Expired - Lifetime JPH0813019B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62219430A JPH0813019B2 (en) 1987-09-01 1987-09-01 Optical amplifier repeater
EP88114195A EP0305995B1 (en) 1987-09-01 1988-08-31 An optical amplifying repeater
DE88114195T DE3885389T2 (en) 1987-09-01 1988-08-31 Optical repeater.
US07/239,352 US4886334A (en) 1987-09-01 1988-09-01 Optical amplifying repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62219430A JPH0813019B2 (en) 1987-09-01 1987-09-01 Optical amplifier repeater

Publications (2)

Publication Number Publication Date
JPS6462038A true JPS6462038A (en) 1989-03-08
JPH0813019B2 JPH0813019B2 (en) 1996-02-07

Family

ID=16735275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62219430A Expired - Lifetime JPH0813019B2 (en) 1987-09-01 1987-09-01 Optical amplifier repeater

Country Status (1)

Country Link
JP (1) JPH0813019B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550680A (en) * 1978-10-06 1980-04-12 Hitachi Ltd Light output control system
JPS5972054U (en) * 1982-11-04 1984-05-16 富士通株式会社 Signal disconnection detection circuit
JPS59181836A (en) * 1983-03-31 1984-10-16 Nec Corp Optical repeater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550680A (en) * 1978-10-06 1980-04-12 Hitachi Ltd Light output control system
JPS5972054U (en) * 1982-11-04 1984-05-16 富士通株式会社 Signal disconnection detection circuit
JPS59181836A (en) * 1983-03-31 1984-10-16 Nec Corp Optical repeater

Also Published As

Publication number Publication date
JPH0813019B2 (en) 1996-02-07

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