Variable wavelength laser device
US5943349A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Jun 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention has as an object thereof to provide a variable wavelength laser device which has superior productivity and a simple structure, and is capable of obtaining laser light which is highly stable and has a variable wavelength. In order to attain the above object, the present invention is provided with a laser diode 30 having a non-reflective film formed on one end surface thereof and having a total reflection film formed on the other end surface thereof; a light feedback part 44 which is formed externally to the laser diode 30, reflects a portion of the laser light emitted from laser diode 30 and feeds this light back into laser diode 30; and a variable wavelength band pass filter 40, which is disposed between laser diode 30 and light feedback part 44, has transmission characteristics such that light in a specified wavelength band is transmitted, and has a variable wave transmission band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.