Optical communications system
US6233261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4087
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Apparatus for simultaneously monitoring and controlling the wavelength of a plurality of semiconductor lasers whose wavelengths can be adjusted, the device including a wavelength filter including a wavelength division demultiplexer (WDM) arranged to receive a portion of the output power of each laser and divide the laser output between two filter outputs, a photoreceiver arranged to measure the power at each filter output, a processor arranged to selectably compute the ratio of the power at the two filter outputs for each laser, apparatus to compare the computed ratio with a predetermined reference ratio for the selected laser, and apparatus to adjust the wavelength of the selected laser in response to the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.