Control circuit for the drive current of a laser
US4347610A · kind A · utility
14Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Sep 22, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Control circuit for controlling a laser drive current. In known control circuits certain levels of the optical output signal are kept constant. This renders it difficult to satisfy certain requirements during the life of the laser as regards the linearity of the modulation of the optical output signal. In the described control circuit the intermodulation of two signals present in the modulation signal with substantially constant amplitudes is measured, an error signal which controls a component of the drive current being derived therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.