Controller for semiconductor laser light source
US4977564A · kind A · utility
12Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | May 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a controller for a semiconductor laser light source, a portion of light emitted from the source is fed back to regulate the spectral line width of the source and to regulate the oscillation frequency of the source in terms of the phase of the portion or the driving current for the source, the very small portion of the light is allowed to pass through an external resonator so as to be subjected to optical frequency discrimination by an optical frequency discriminator, the portion does not need to be divided from a communication signal light. Therefore, the communication signal light can be undergo a loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.