Patent ID: 6795459
Filing Date: 2004-09-21
Classification: G01J,H01S,H04B

Abstract:
Apparatus for locking the frequency of light present in a light beam generated by a controllable laser light source, comprising:a light diverter to receive the light beam as a first beam portion and provide there from a second beam portion having a transverse displacement characteristic representative of the frequency of the light present in said first beam portion, wherein the light beam makes only a single-pass through said light diverter; a light detection unit to receive said second beam portion, to detect said transverse displacement characteristic of the frequency, and to provide a raw signal based on said transverse displacement characteristic; a processor to receive said raw signal and process said raw signal into a processed signal representative of the frequency of the light present in the light beam; and said processor further controlling the light source based on said processed signal, thereby controlling the frequency of the light beam being generated.