JPS55137740A - Light analogue signal modulation system - Google Patents

Light analogue signal modulation system

Info

Publication number
JPS55137740A
JPS55137740A JP4548279A JP4548279A JPS55137740A JP S55137740 A JPS55137740 A JP S55137740A JP 4548279 A JP4548279 A JP 4548279A JP 4548279 A JP4548279 A JP 4548279A JP S55137740 A JPS55137740 A JP S55137740A
Authority
JP
Japan
Prior art keywords
low
frequency components
modulation system
signal modulation
analogue signal
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
JP4548279A
Other languages
Japanese (ja)
Inventor
Koichi Asatani
Hideki Ishio
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 JP4548279A priority Critical patent/JPS55137740A/en
Publication of JPS55137740A publication Critical patent/JPS55137740A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To reduce nonlinear distortion of a light signal by suppressing low- frequency components in the transmission side and by expanding suppressed low- frequency components in the receiving side. CONSTITUTION:An input signal is supplied to preemphasis circuit 6 of the transmission side and has low-frequency components suppressed to reduce the generation quantity of nonlinear distortion of semiconductor laser diode 2, and low-frequency components are expanded by deemphasis circuit 10 of the receiving side to make the frequency characteristic flat.
JP4548279A 1979-04-16 1979-04-16 Light analogue signal modulation system Pending JPS55137740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4548279A JPS55137740A (en) 1979-04-16 1979-04-16 Light analogue signal modulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4548279A JPS55137740A (en) 1979-04-16 1979-04-16 Light analogue signal modulation system

Publications (1)

Publication Number Publication Date
JPS55137740A true JPS55137740A (en) 1980-10-27

Family

ID=12720611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4548279A Pending JPS55137740A (en) 1979-04-16 1979-04-16 Light analogue signal modulation system

Country Status (1)

Country Link
JP (1) JPS55137740A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014075492A (en) * 2012-10-04 2014-04-24 Sony Corp Correction circuit, drive circuit, light-emitting device, and correction method of current pulse waveform
JP2014103519A (en) * 2012-11-19 2014-06-05 Fujitsu Ltd Emphasis signal generation circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014075492A (en) * 2012-10-04 2014-04-24 Sony Corp Correction circuit, drive circuit, light-emitting device, and correction method of current pulse waveform
JP2014103519A (en) * 2012-11-19 2014-06-05 Fujitsu Ltd Emphasis signal generation circuit

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