JPS57141980A - System for improving distortion rate of light emitting diode - Google Patents

System for improving distortion rate of light emitting diode

Info

Publication number
JPS57141980A
JPS57141980A JP2750681A JP2750681A JPS57141980A JP S57141980 A JPS57141980 A JP S57141980A JP 2750681 A JP2750681 A JP 2750681A JP 2750681 A JP2750681 A JP 2750681A JP S57141980 A JPS57141980 A JP S57141980A
Authority
JP
Japan
Prior art keywords
light
feedback
emitting diode
light emitting
diode
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
JP2750681A
Other languages
Japanese (ja)
Inventor
Koichi Oota
Susumu Hanaoka
Akihiko Ichikawa
Toshiyuki Sakai
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 JP2750681A priority Critical patent/JPS57141980A/en
Publication of JPS57141980A publication Critical patent/JPS57141980A/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
    • H04B10/58—Compensation for non-linear transmitter output
    • 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

Landscapes

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

Abstract

PURPOSE:To improve the distortion rate with small amount of feedback, by providing an optical frequency divider which selects a specified wavelength in a feedback type, light emitting diode driving circuit comprising the light emitting diode, a light receiving element, and a driving amplifier, transducing the light into an electric signal, and feeding back the signal to the amplifier. CONSTITUTION:The electric signal is inputted in an input terminal 1. The difference between the signal and the feedback signal is formed in a synthesizer 2, sent to the driving amplifier 3, and amplified. Then the light emitting diode 4 is actuated and the generated output light is irradiated to the outside through an optical fiber 6. The receiving element 6 is arranged in the vicinity of the diode 4. Part of the light output from the diode 4 is fed back to the synthesizer 2 through a feedback circuit 7. At this time, the optical frequency divider 8 is inserted between the diode 4 and the light receiving element 6. Said optical frequency divider 8 is constituted by a reflecting plate wherein a plurality of grooves are provided in parallel on a flat plate with an equal interval being provided. The selectivity characteristic of the divider 8 is made steep by utilizing the fact that the angle dispersion of the reflected light is different in accordance with the wavelengths. Thus the feedback is made as small as 1, and the nonlinear distortion is compensated.
JP2750681A 1981-02-26 1981-02-26 System for improving distortion rate of light emitting diode Pending JPS57141980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2750681A JPS57141980A (en) 1981-02-26 1981-02-26 System for improving distortion rate of light emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2750681A JPS57141980A (en) 1981-02-26 1981-02-26 System for improving distortion rate of light emitting diode

Publications (1)

Publication Number Publication Date
JPS57141980A true JPS57141980A (en) 1982-09-02

Family

ID=12223017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2750681A Pending JPS57141980A (en) 1981-02-26 1981-02-26 System for improving distortion rate of light emitting diode

Country Status (1)

Country Link
JP (1) JPS57141980A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63102381A (en) * 1986-10-20 1988-05-07 Fujikura Ltd Led-stabilizing light source
JPH04249930A (en) * 1990-03-05 1992-09-04 Motorola Inc Low distortion optical communication system
EP0543812A1 (en) * 1989-10-25 1993-06-02 Tacan Corporation High linearity optical transmitter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63102381A (en) * 1986-10-20 1988-05-07 Fujikura Ltd Led-stabilizing light source
EP0543812A1 (en) * 1989-10-25 1993-06-02 Tacan Corporation High linearity optical transmitter
JPH04249930A (en) * 1990-03-05 1992-09-04 Motorola Inc Low distortion optical communication system

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