JPS57103444A - Optical communication device - Google Patents

Optical communication device

Info

Publication number
JPS57103444A
JPS57103444A JP55179044A JP17904480A JPS57103444A JP S57103444 A JPS57103444 A JP S57103444A JP 55179044 A JP55179044 A JP 55179044A JP 17904480 A JP17904480 A JP 17904480A JP S57103444 A JPS57103444 A JP S57103444A
Authority
JP
Japan
Prior art keywords
led
fiber
output light
light
amplifier
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
JP55179044A
Other languages
Japanese (ja)
Inventor
Kiyoaki Kawai
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 JP55179044A priority Critical patent/JPS57103444A/en
Publication of JPS57103444A publication Critical patent/JPS57103444A/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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion

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 reduce restrictions on the fiber band due to dispersion of materials to extend the transmission distance, by inserting an optical band pass filter to the light path to narrow the half-amplitude level of the spread of an optical spectrum. CONSTITUTION:A signal inputted to a pulse input terminal 15 is given to an LED driving circuit 11, and the circuit 11 responds to the input pulse to cause an LED 12 to emit a light. The output light of the LED 12 is incident to a fiber 13 through an optical band pass filter 17. The output light is converted photoelectrically and is amplified electrically at the receiving end of the fiber 13 by a receiving amplifier 14 and is outputted to a terminal 16. The filter 17 has a center wavelength lambda0, and the width of the pass band is narrower than a half- amplitude level DELTAlambda of the spectrum spread of a light source. The output light of the filter 17 has a level lower than that of the output light of the LED 12, and an amplifier of a high gain is used as the amplifier 14. Thus, restrictions on the fiber band due to dispersion of materials are reduced to extend the transmission distance considerably.
JP55179044A 1980-12-19 1980-12-19 Optical communication device Pending JPS57103444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55179044A JPS57103444A (en) 1980-12-19 1980-12-19 Optical communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55179044A JPS57103444A (en) 1980-12-19 1980-12-19 Optical communication device

Publications (1)

Publication Number Publication Date
JPS57103444A true JPS57103444A (en) 1982-06-28

Family

ID=16059133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55179044A Pending JPS57103444A (en) 1980-12-19 1980-12-19 Optical communication device

Country Status (1)

Country Link
JP (1) JPS57103444A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5508845A (en) * 1990-10-18 1996-04-16 Telstra Corporation Limited Quasi-soliton communication system
JP2006246104A (en) * 2005-03-04 2006-09-14 Nippon Telegr & Teleph Corp <Ntt> Optical wavelength division multiplex transmitter, optical wavelength division multiplex transmission system, and optical transmission circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5508845A (en) * 1990-10-18 1996-04-16 Telstra Corporation Limited Quasi-soliton communication system
JP2006246104A (en) * 2005-03-04 2006-09-14 Nippon Telegr & Teleph Corp <Ntt> Optical wavelength division multiplex transmitter, optical wavelength division multiplex transmission system, and optical transmission circuit
JP4526123B2 (en) * 2005-03-04 2010-08-18 日本電信電話株式会社 Optical wavelength division multiplexing transmission apparatus, optical wavelength division multiplexing transmission system, optical transmission circuit

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