Methods for simultaneous suppression of laser pulsations and continuous monitoring of output power
US4297651A · kind A · utility
7Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Aug 23, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1032
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Semiconductor lasers exhibit transient relaxation oscillations on start-up and specific lasers often exhibit sustained spontaneous pulsations caused probably by crystalline defects. These fluctuations are suppressed by coupling laser emission into a 0.3 to 2 cm. length of waveguide and coupling light reflected from the end of the waveguide back into the laser. Embodiments disclosed include one utilizing a length of optical fibre, while others are integrated optical structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.