JPS645127A - Optical transmitter - Google Patents
Optical transmitterInfo
- Publication number
- JPS645127A JPS645127A JP62159674A JP15967487A JPS645127A JP S645127 A JPS645127 A JP S645127A JP 62159674 A JP62159674 A JP 62159674A JP 15967487 A JP15967487 A JP 15967487A JP S645127 A JPS645127 A JP S645127A
- Authority
- JP
- Japan
- Prior art keywords
- intensity
- light intensity
- modulator
- phase
- light
- 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
Landscapes
- Optical Communication System (AREA)
Abstract
PURPOSE:To attain high performance of wavelength multiplex coherent optical fiber communication by using a light intensity limiter so as to eliminate the intensity fluctuation of the light subject to phase or frequency modulation so as to prevent the production of phase crosstalk. CONSTITUTION:A light intensity limiter 14 consists of a light intensity modulator 141 controlling the light intensity and a part controlling the modulator 141. Since high speed is required for the light intensity modulator 141, a travelling waveform using a lithium iobate the same as an optical phase modulator 13 is used, but since the intensity modulation is applied, the system controlling the coupling coefficient of two adjacent waveguide paths on the lithium iobate is adopted. Then the light subject to intensity modulation by the optical phase modulator 13 is corrected to have a constant intensity by a light intensity limiter 14. Thus, the phase crosstalk in the wavelength multiplex coherent optical fiber communication is remarkably relaxed and multi-channel and long range optical fiber communication are attained.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62159674A JPS645127A (en) | 1987-06-29 | 1987-06-29 | Optical transmitter |
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 |
---|---|---|---|
JP62159674A JPS645127A (en) | 1987-06-29 | 1987-06-29 | Optical transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645127A true JPS645127A (en) | 1989-01-10 |
Family
ID=15698855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62159674A Pending JPS645127A (en) | 1987-06-29 | 1987-06-29 | Optical transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645127A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0565035A2 (en) * | 1992-04-07 | 1993-10-13 | Hitachi, Ltd. | Optical modulator optical transmitter apparatus and optical transmission system |
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 |
WO2007129718A1 (en) | 2006-05-02 | 2007-11-15 | A & D Company, Limited | Load measuring mechanism for electronic balance,and method for assembling the same mechanism |
JP4768717B2 (en) * | 2004-04-24 | 2011-09-07 | ザトーリウス アクチエン ゲゼルシャフト | Low-profile weighing system that can be placed horizontally in narrowly spaced rows |
JP4768718B2 (en) * | 2004-04-24 | 2011-09-07 | ザトーリウス アクチエン ゲゼルシャフト | Low-profile weighing system that can be placed horizontally in narrowly spaced rows |
-
1987
- 1987-06-29 JP JP62159674A patent/JPS645127A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0565035A2 (en) * | 1992-04-07 | 1993-10-13 | Hitachi, Ltd. | Optical modulator optical transmitter apparatus and optical transmission system |
EP0565035A3 (en) * | 1992-04-07 | 1994-12-28 | Hitachi Ltd | |
US5515196A (en) * | 1992-04-07 | 1996-05-07 | Hitachi, Ltd. | Optical intensity and phase modulators in an optical transmitter apparatus |
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 |
JP4768717B2 (en) * | 2004-04-24 | 2011-09-07 | ザトーリウス アクチエン ゲゼルシャフト | Low-profile weighing system that can be placed horizontally in narrowly spaced rows |
JP4768718B2 (en) * | 2004-04-24 | 2011-09-07 | ザトーリウス アクチエン ゲゼルシャフト | Low-profile weighing system that can be placed horizontally in narrowly spaced rows |
WO2007129718A1 (en) | 2006-05-02 | 2007-11-15 | A & D Company, Limited | Load measuring mechanism for electronic balance,and method for assembling the same mechanism |
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