Solid-state laser device having a feedback loop
US5265115A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Aug 26, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/131
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a solid-state laser device which pumps a solid-state laser medium in a laser resonator by an excitation laser beam generated from a semiconductor laser unit and which emits an output laser beam, a photo detector detects intensity of the output laser beam to produce a photo detection signal which corresponds to the intensity of the output laser beam and which is sent to a controller. The controller controls the semiconductor laser unit in response to the photo detection signal and adjusts intensity of the excitation laser beam to keep the intensity of the output laser beam substantially constant. The solid-state laser medium may be pumped from an end surface or a side surface. An optical function element, such as a wavelength conversion element, a Q switch element, may be located outside or inside of the laser resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.