Patent ID: 6587487
Filing Date: 2003-07-01
Classification: H01S

Abstract:
A harmonic laser comprisinga) a first high reflector and an output coupler forming a resonator cavity having an optical axis; said resonator cavity including a laser medium for producing a fundamental beam; said first high reflector reflective of fundamental beam; b) a second harmonic generator located within said resonator cavity generating a second harmonic beam from said fundamental beam; c) said output coupler partially reflective and partially transmissive of fundamental beam and transmissive of second harmonic beam; d) said second harmonic generator located between said output coupler and said laser medium so that fundamental beam (i) makes a first pass through said second harmonic generator, (ii) is partially reflected by said output coupler and (iii) makes a second pass across said second harmonic generator; e) a beam separator located between said harmonic generator and said laser medium, said beam separator separating second harmonic beam from fundamental beam; f) a second high reflector located in optical communication with said beam separator to receive said second harmonic beam from said beam separator; said second high reflector reflective for second harmonic beam so that second harmonic beam propagating from said second harmonic generator formed on said second pass of said fundamental beam is reflected back along said optical axis to said output coupler for transmission outside said cavity.