Apparatus and method for controlling the light intensity of a laser diode
US5123024A · kind A · utility
25Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Aug 6, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A closed loop circuit for controlling the intensity of light emitted by a laser diode. A portion of the light emitted by the laser diode is used as an optical feedback signal and applied to a photodetector. The difference between a current produced by the photodetector and a reference current is an error current which is passed via a low impedance path to an integrating amplifier. The integrated error current is used to control the current flowing through the laser diode, thereby controlling the intensity of light emitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.