JPS56125126A - Light modulating circuit - Google Patents

Light modulating circuit

Info

Publication number
JPS56125126A
JPS56125126A JP2896680A JP2896680A JPS56125126A JP S56125126 A JPS56125126 A JP S56125126A JP 2896680 A JP2896680 A JP 2896680A JP 2896680 A JP2896680 A JP 2896680A JP S56125126 A JPS56125126 A JP S56125126A
Authority
JP
Japan
Prior art keywords
light source
signal
nonlinear distortion
optical signal
outputted optical
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
JP2896680A
Other languages
Japanese (ja)
Inventor
Toshiharu Yasuki
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 JP2896680A priority Critical patent/JPS56125126A/en
Publication of JPS56125126A publication Critical patent/JPS56125126A/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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/502—LED transmitters
    • 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
    • H04B10/50—Transmitters
    • H04B10/58—Compensation for non-linear transmitter output

Abstract

PURPOSE:To improve the nonlinear distortion, by using the same type of light source as the light source being the objective of nonlinear distortion improvement. CONSTITUTION:The input signal e1 modulates the outputted optical signal of the light source 2 the same type as the light source 2 via the modulation circuit 1. The outputted optical signal of the light source 2 is converted again into an electric signal with the photodetetor 3 optically coupled with the light source 2, and the polarity is inverted at the amplifier 4 after amplification into the signal e2. The signal e2 includes nonlinear distortion due to the light source 2, and the outputted optical signal P of the light source 6 is modulated with the signal polarity opposite to the case with the modulation of the light source 2 via the modulation circuit 5. Thus, the nonlinear distortion produced at the light source 6 is canceled with the nonlinear distortion by the light source 2, allowing to improve the distortion.
JP2896680A 1980-03-07 1980-03-07 Light modulating circuit Pending JPS56125126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2896680A JPS56125126A (en) 1980-03-07 1980-03-07 Light modulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2896680A JPS56125126A (en) 1980-03-07 1980-03-07 Light modulating circuit

Publications (1)

Publication Number Publication Date
JPS56125126A true JPS56125126A (en) 1981-10-01

Family

ID=12263148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2896680A Pending JPS56125126A (en) 1980-03-07 1980-03-07 Light modulating circuit

Country Status (1)

Country Link
JP (1) JPS56125126A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683410A1 (en) * 1991-11-05 1993-05-07 Thomson Csf Method of improving the linearity performance of a network of analog links, and its use in a video communications network
EP1401127A2 (en) * 2002-09-18 2004-03-24 Pioneer Corporation Modulation apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683410A1 (en) * 1991-11-05 1993-05-07 Thomson Csf Method of improving the linearity performance of a network of analog links, and its use in a video communications network
EP1401127A2 (en) * 2002-09-18 2004-03-24 Pioneer Corporation Modulation apparatus
EP1401127A3 (en) * 2002-09-18 2005-04-06 Pioneer Corporation Modulation apparatus

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