Patent ID: 7463657
Filing Date: 2008-12-09
Classification: G02F,H01S

Abstract:
1. A laser, comprising: a standing-wave laser resonator; first and second optically nonlinear crystals located in said laser resonator, said laser resonator including at least one gain-element generating a CW fundamental radiation beam in said resonator, said fundamental radiation circulating in forward and reverse directions in said laser resonator through said optically nonlinear crystals, said gain element being an optically pumped semiconductor multi-layer gain structure; said first optically nonlinear crystal arranged to convert a portion of said fundamental radiation propagating therethrough in said forward direction to CW second-harmonic radiation; said second optically nonlinear crystal arranged to convert a portion of said second-harmonic radiation propagating therethrough in said forward and reverse directions into CW radiation having a converted frequency different from the frequency of said second-harmonic radiation; and wherein said first optically nonlinear crystal is arranged to convert an unconverted portion of said second-harmonic radiation propagating therethrough in said reverse direction back to fundamental radiation.