Patent ID: 7411991
Filing Date: 2008-08-12
Classification: G11B,H01S

Abstract:
1. An apparatus, comprising: a tunable laser cavity, wherein said laser cavity comprises at least three mirrors, at least one filter and a plurality of crystals, wherein at least one electromagnetic radiation source being coupled to the laser cavity, wherein said at least one electromagnetic radiation source is capable of providing electromagnetic radiation having an approximately particular wavelength to said laser cavity, wherein at least one of said plurality of crystals is configured to, in operation, alter one or more properties of said electromagnetic radiation provided by said electromagnetic radiation source, wherein said at least one filter is configured to filter at least a portion of the electromagnetic radiation altered by at least one of said plurality of crystals, wherein the at least one filter is adjustable to tune the frequency of the electromagnetic radiation altered by the at least one of said plurality of crystals, wherein at least one filter comprises a quartz birefringent filter, wherein said quartz birefringent filter further comprises three plates of quartz birefringent.