JPS57103444A - Optical communication device - Google Patents
Optical communication deviceInfo
- 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
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.
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)
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 |
-
1980
- 1980-12-19 JP JP55179044A patent/JPS57103444A/en active Pending
Cited By (3)
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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