Variable wavelength laser device

Details Variable wavelength laser device Variable wavelength laser device

1998-06-22

1999-08-24

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Tuning

372 32, 372 6, 372 49, H01S 310

Patent

active

059433493

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.

REFERENCES:
patent: 4796997 (1989-01-01), Svetkoff et al.
patent: 5651018 (1997-07-01), Mehuys et al.

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