JPS647727A - Light transmission equipment - Google Patents
Light transmission equipmentInfo
- Publication number
- JPS647727A JPS647727A JP62161179A JP16117987A JPS647727A JP S647727 A JPS647727 A JP S647727A JP 62161179 A JP62161179 A JP 62161179A JP 16117987 A JP16117987 A JP 16117987A JP S647727 A JPS647727 A JP S647727A
- Authority
- JP
- Japan
- Prior art keywords
- light
- output
- intensity
- multiplexed
- optical fiber
- 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
Abstract
PURPOSE:To obtain a large light output and to attain an ultra-long distance large capacity wavelength multiplexing PSK optical fiber communication system by controlling constantly the intensity of a phase or frequency modulated light. CONSTITUTION:To transmitters T1-T10, separate signals S1-S10 are inputted, and the output light is multiplexed in the same propagation direction with a multiplexing device 4. For example, in the transmitter T1, a semiconductor laser 12 is continuously oscillated, the output is given through a light phase modulator 13 to a laser diode saturable light amplifier 14 and the output intensity is constantly corrected. A signal light shaped to a constant intensity regardless of a phase modulation with the amplifier 14 is multiplexed with other channel by the multiplexing device 4 and made incident on an optical fiber 5.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161179A JPS647727A (en) | 1987-06-30 | 1987-06-30 | Light transmission equipment |
US07/212,385 US4933929A (en) | 1987-06-29 | 1988-06-27 | Wavelength multiplexed optical transmitter for generating constant-amplitude angle-modulated beams to eliminate phase noise in adjacent transmission channels |
EP88110283A EP0297504A3 (en) | 1987-06-29 | 1988-06-28 | Wavelength multiplexed optical transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161179A JPS647727A (en) | 1987-06-30 | 1987-06-30 | Light transmission equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647727A true JPS647727A (en) | 1989-01-11 |
Family
ID=15730087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62161179A Pending JPS647727A (en) | 1987-06-29 | 1987-06-30 | Light transmission equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647727A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0418527A (en) * | 1990-05-11 | 1992-01-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical soliton transmission method |
US6104848A (en) * | 1997-03-04 | 2000-08-15 | Nec Corporation | WDM optical transmitter |
US6134034A (en) * | 1996-03-18 | 2000-10-17 | Fujitsu Limited | Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light |
US6266169B1 (en) | 1992-04-08 | 2001-07-24 | Hitachi, Ltd. | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal |
JP2004516743A (en) * | 2000-12-21 | 2004-06-03 | ブッカム・テクノロジー・ピーエルシー | Improvements in or related to optical communications |
-
1987
- 1987-06-30 JP JP62161179A patent/JPS647727A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0418527A (en) * | 1990-05-11 | 1992-01-22 | Nippon Telegr & Teleph Corp <Ntt> | Optical soliton transmission method |
US6266169B1 (en) | 1992-04-08 | 2001-07-24 | Hitachi, Ltd. | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal |
US6728489B2 (en) | 1992-04-08 | 2004-04-27 | Hitachi, Ltd. | Optical transmission system constructing method and system |
US7167652B2 (en) | 1992-04-08 | 2007-01-23 | Hitachi, Ltd | Optical transmission system constructing method and system |
US7292785B2 (en) | 1992-04-08 | 2007-11-06 | Hitachi, Ltd. | Optical transmission system constructing method and system |
US6134034A (en) * | 1996-03-18 | 2000-10-17 | Fujitsu Limited | Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light |
US6271945B1 (en) | 1996-03-18 | 2001-08-07 | Fujitsu Limited | Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light |
US6104848A (en) * | 1997-03-04 | 2000-08-15 | Nec Corporation | WDM optical transmitter |
JP2004516743A (en) * | 2000-12-21 | 2004-06-03 | ブッカム・テクノロジー・ピーエルシー | Improvements in or related to optical communications |
US8200099B2 (en) | 2000-12-21 | 2012-06-12 | Oclaro Technology Limited | Demodulation of an optical carrier |
US8213806B2 (en) | 2000-12-21 | 2012-07-03 | Oclaro Technology Limited | Optical communications |
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