Laser diode monitoring apparatus for determining the decay of laser diode
US5798992A · kind A · utility
11Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Oct 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0683
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser diode monitoring apparatus activates the laser diode in a manner of impulse, measures the sag of light output level, and judges the light emitting performance to be deteriorated if the sag is greater than the reference value. The value of sag comprehends the inequality of light output characteristics of individual laser diodes and the variation of ambient temperature, enabling the accurate decay determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.