Patent ID: 7154928
Filing Date: 2006-12-26
Classification: G03F,H01S

Abstract:
1. A narrow band short pulse duration gas discharge laser output light pulse beam producing system, producing a beam comprising laser output light pulses at a selected pulse repetition rate, comprising: a dispersive bandwidth selection optic selecting at least one center wavelength for each pulse determined at least in part by the angle of incidence of the laser light pulse beam containing the respective pulse on the dispersive wavelength selection optic; a tuning mechanism operative to select at least one angle of incidence of the a laser light pulse beam containing the respective pulse upon the dispersive center wavelength selection optic; the tuning mechanism comprising a plurality of incidence angle selection elements each defining an angle of incidence for a different spatially separated but not temporally separated portion of the laser light pulse to return from the dispersive center wavelength selection optic a laser light pulse comprising a plurality of spatially separated but not temporally separated portions, each portion having one of at least two different selected center wavelengths.