JPS56162554A - Optical amplifying repeater - Google Patents

Optical amplifying repeater

Info

Publication number
JPS56162554A
JPS56162554A JP6599580A JP6599580A JPS56162554A JP S56162554 A JPS56162554 A JP S56162554A JP 6599580 A JP6599580 A JP 6599580A JP 6599580 A JP6599580 A JP 6599580A JP S56162554 A JPS56162554 A JP S56162554A
Authority
JP
Japan
Prior art keywords
amplifier
output
incident
optical power
splitter
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
JP6599580A
Other languages
Japanese (ja)
Inventor
Takaaki Mukai
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 JP6599580A priority Critical patent/JPS56162554A/en
Publication of JPS56162554A publication Critical patent/JPS56162554A/en
Pending 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • 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]

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To secure a stable repeating and amplificaion output by monitoring optical power incident to and emitted from a semiconductor optical amplifier and then by forming a feedback loop for an applied current and operation temperature so that an amplifier gain is constant at any time by the optical power. CONSTITUTION:An incident beam is branched by a beam splitter 1 and then amplified by an optical amplifier 3 after passing through a lens 2; and it is made by an output lens 4 into parallel light, which is transmitted to the next transmission line via a beam splitter 5. The incident beam branched by the splitter 1 is applied to a photodetector 6 and an electric output proportional to incident beam intensity is applied to an amplifier 8', whose output is inputted to a differential amplifier 8. Part of the output beam branched by the splitter 5, on the other hand, is applied to a photodetector 7 and its electric output proportional to output beam intensity is applied to the amplifier 8 as well. Then, incident optical power to and emitted optical power from the amplifier 3 are monitored by the differential amplifier 8 to hold the amplification gain constant at any time, thereby securing the stability of a repeating and amplification output.
JP6599580A 1980-05-20 1980-05-20 Optical amplifying repeater Pending JPS56162554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6599580A JPS56162554A (en) 1980-05-20 1980-05-20 Optical amplifying repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6599580A JPS56162554A (en) 1980-05-20 1980-05-20 Optical amplifying repeater

Publications (1)

Publication Number Publication Date
JPS56162554A true JPS56162554A (en) 1981-12-14

Family

ID=13303092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6599580A Pending JPS56162554A (en) 1980-05-20 1980-05-20 Optical amplifying repeater

Country Status (1)

Country Link
JP (1) JPS56162554A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910046A (en) * 1982-07-07 1984-01-19 Fujitsu Ltd Optical repeater
JPS5986930A (en) * 1982-11-11 1984-05-19 Fujitsu Ltd Optical repeater
EP0377948A2 (en) * 1989-01-12 1990-07-18 Kabushiki Kaisha Toshiba An optical amplifying device
EP0515179A2 (en) * 1991-05-20 1992-11-25 Furukawa Electric Co., Ltd. Optical amplifiers
EP0593237A2 (en) * 1992-10-13 1994-04-20 Nec Corporation Optical semiconductor amplifier
US5475521A (en) * 1992-05-09 1995-12-12 Alcatel Sel Aktiengesellschaft Optical communication system with monitoring device for avoiding giant pluses
EP3148018A1 (en) * 2015-09-25 2017-03-29 Alcatel Lucent Amplification device with polarized soas, for amplifying optical signals in a wdm transmission system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057502A (en) * 1973-09-20 1975-05-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057502A (en) * 1973-09-20 1975-05-20

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910046A (en) * 1982-07-07 1984-01-19 Fujitsu Ltd Optical repeater
JPS5986930A (en) * 1982-11-11 1984-05-19 Fujitsu Ltd Optical repeater
EP0377948A2 (en) * 1989-01-12 1990-07-18 Kabushiki Kaisha Toshiba An optical amplifying device
EP0515179A2 (en) * 1991-05-20 1992-11-25 Furukawa Electric Co., Ltd. Optical amplifiers
US5475521A (en) * 1992-05-09 1995-12-12 Alcatel Sel Aktiengesellschaft Optical communication system with monitoring device for avoiding giant pluses
EP0593237A2 (en) * 1992-10-13 1994-04-20 Nec Corporation Optical semiconductor amplifier
EP0593237A3 (en) * 1992-10-13 1994-05-04 Nec Corporation Optical semiconductor amplifier
EP3148018A1 (en) * 2015-09-25 2017-03-29 Alcatel Lucent Amplification device with polarized soas, for amplifying optical signals in a wdm transmission system

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