JPS57162541A - Optical pulse receiver - Google Patents

Optical pulse receiver

Info

Publication number
JPS57162541A
JPS57162541A JP56046261A JP4626181A JPS57162541A JP S57162541 A JPS57162541 A JP S57162541A JP 56046261 A JP56046261 A JP 56046261A JP 4626181 A JP4626181 A JP 4626181A JP S57162541 A JPS57162541 A JP S57162541A
Authority
JP
Japan
Prior art keywords
pulse
output
circuit
amplifier
gate circuit
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
JP56046261A
Other languages
Japanese (ja)
Other versions
JPS623623B2 (en
Inventor
Michiyuki Takemata
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56046261A priority Critical patent/JPS57162541A/en
Publication of JPS57162541A publication Critical patent/JPS57162541A/en
Publication of JPS623623B2 publication Critical patent/JPS623623B2/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
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/697—Arrangements for reducing noise and distortion
    • 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
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/691—Arrangements for optimizing the photodetector in the receiver
    • H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations

Landscapes

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

Abstract

PURPOSE:To prevent generation of shot noise for an optical pulse receiver, by closing a gate circuit in case the optical input pulse is interrupted or drops abnormally. CONSTITUTION:The pulse supplied to a receiver via an optical transmission line is converted into an electric signal through an APD1 and then amplified by an amplifier 2 to be applied to a gate circuit 8 through a discriminating/reproducing circuit 7. A part of the output of the amplifier 2 receives a detection of its peak value through a peak detector 3 and is applied to an APD via a converter 4 to perform an AGC. At the same time, another part of the output of the amplifier 2 is applied to a level detector 6 through a band pass filter 5 that transmits the frequency component of a carrier pulse. When the output of the filter 5 is higher than a certain level, the circuit 8 is opened to make the output of the circuit 7 pass through a demodulator 9. The gate circuit 8 is closed in case the pulse is interrupted or drops abnormally. Thus the occurrence of the shot noise can be prevented.
JP56046261A 1981-03-31 1981-03-31 Optical pulse receiver Granted JPS57162541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56046261A JPS57162541A (en) 1981-03-31 1981-03-31 Optical pulse receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56046261A JPS57162541A (en) 1981-03-31 1981-03-31 Optical pulse receiver

Publications (2)

Publication Number Publication Date
JPS57162541A true JPS57162541A (en) 1982-10-06
JPS623623B2 JPS623623B2 (en) 1987-01-26

Family

ID=12742257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56046261A Granted JPS57162541A (en) 1981-03-31 1981-03-31 Optical pulse receiver

Country Status (1)

Country Link
JP (1) JPS57162541A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008153439A1 (en) * 2007-06-15 2008-12-18 Molotkov Sergei Nikolaevich Device for recording weak optical pulses
US10203266B2 (en) 2013-12-12 2019-02-12 Kokusai Keisokuki Kabushiki Kaisha Bearing testing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07153099A (en) * 1993-11-26 1995-06-16 Nec Corp Apparatus for driving objective lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008153439A1 (en) * 2007-06-15 2008-12-18 Molotkov Sergei Nikolaevich Device for recording weak optical pulses
US10203266B2 (en) 2013-12-12 2019-02-12 Kokusai Keisokuki Kabushiki Kaisha Bearing testing machine

Also Published As

Publication number Publication date
JPS623623B2 (en) 1987-01-26

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