发明名称 |
Laser wavelength control in an optical communication system |
摘要 |
A method and apparatus for controlling and stabilizing laser wavelengths in a dense wavelength division multiplexer (DWDM) transmission system. The lasers in the transmission system are each modulated in a known manner by a data signal. In addition, the lasers are each modulated by a plurality of test signals each having a predetermined frequency. At the optical receiver, a frequency analyzer examiners the frequency test signals for distortions and/or changes in amplitude. Any distortions and/or changes in amplitude of the frequency test signals indicate a change in the wavelength of a corresponding laser. A control signal may be returned to the laser controller of each laser to regulate the laser wavelength. A fault signal may be generated indicating that the wavelength of a laser has changed, drifted, etc., more an acceptable amount.
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申请公布号 |
US6271944(B1) |
申请公布日期 |
2001.08.07 |
申请号 |
US19990343906 |
申请日期 |
1999.06.30 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORP. |
发明人 |
SCHEMMANN MARCEL F. C.;MUTALIK VENKATESH G. |
分类号 |
H01S5/0687;H04B10/02;H04B10/04;H04B10/06;H04B10/08;H04B10/14;H04B10/155;H04J14/00;H04J14/02;(IPC1-7):H04B10/00 |
主分类号 |
H01S5/0687 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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