JPS51136206A - Automatic light level controlling for light pcm relay - Google Patents

Automatic light level controlling for light pcm relay

Info

Publication number
JPS51136206A
JPS51136206A JP50061185A JP6118575A JPS51136206A JP S51136206 A JPS51136206 A JP S51136206A JP 50061185 A JP50061185 A JP 50061185A JP 6118575 A JP6118575 A JP 6118575A JP S51136206 A JPS51136206 A JP S51136206A
Authority
JP
Japan
Prior art keywords
light
level controlling
automatic
pcm relay
light level
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
JP50061185A
Other languages
Japanese (ja)
Inventor
Osahiro Mochida
Tadao Ogawa
Kazuo Yamaguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP50061185A priority Critical patent/JPS51136206A/en
Publication of JPS51136206A publication Critical patent/JPS51136206A/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
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • 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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
    • H04B10/672—Optical arrangements in the receiver for controlling the input optical signal for controlling the power of the input optical signal
    • H04B10/674—Optical arrangements in the receiver for controlling the input optical signal for controlling the power of the input optical signal using a variable optical attenuator

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:Optical regulation of PCm signal amplitude at recognition point in photo-communication.
JP50061185A 1975-05-21 1975-05-21 Automatic light level controlling for light pcm relay Pending JPS51136206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50061185A JPS51136206A (en) 1975-05-21 1975-05-21 Automatic light level controlling for light pcm relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50061185A JPS51136206A (en) 1975-05-21 1975-05-21 Automatic light level controlling for light pcm relay

Publications (1)

Publication Number Publication Date
JPS51136206A true JPS51136206A (en) 1976-11-25

Family

ID=13163837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50061185A Pending JPS51136206A (en) 1975-05-21 1975-05-21 Automatic light level controlling for light pcm relay

Country Status (1)

Country Link
JP (1) JPS51136206A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399676A1 (en) * 1977-08-04 1979-03-02 Int Standard Electric Corp IN-LINE COUPLER WITH AUTOMATIC GAIN CORRECTION FOR MULTI-TERMINAL FIBER OPTIC TRANSMISSION SYSTEM

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4999403A (en) * 1973-01-29 1974-09-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4999403A (en) * 1973-01-29 1974-09-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399676A1 (en) * 1977-08-04 1979-03-02 Int Standard Electric Corp IN-LINE COUPLER WITH AUTOMATIC GAIN CORRECTION FOR MULTI-TERMINAL FIBER OPTIC TRANSMISSION SYSTEM

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