Patent ID: 6999483
Filing Date: 2006-02-14
Classification: H01S

Abstract:
1. A laser for producing a third, fourth or fifth harmonic beam comprising; a) a first reflector and a second reflector forming a resonator having an optical axis, said resonator including a laser medium for producing a fundamental beam; said first reflector highly reflective of fundamental beam; b) a second harmonic generator located within said resonator for generating a second harmonic beam from said fundamental beam; c) said second reflector at least partially reflective for fundamental beam; d) said resonator producing two resonator output beams of preselected different wave length at least one of which is a harmonic beam; e) one or more output couplers to remove at least a portion of said two output beams from said resonator and direct said removed beams on preselected optical paths outside said resonator; f) a third, fourth or fifth harmonic nonlinear crystal located outside said resonator cavity and located along the preselected optical paths of both output beams to produce a third, fourth or fifth harmonic beam from said two output beams.