Patent ID: 8315284
Filing Date: 2012-11-20
Classification: H01S

Abstract:
1. A laser device operating at a fundamental frequency ω and adapted for frequency conversion of said fundamental frequency to a second harmonic frequency, said device comprising: a beamsplitter having partial reflectivity at the fundamental frequency ω to form a reflected fundamental beam, and said beamsplitter being highly reflective of the second harmonic frequency; a complex optical cavity including said beamsplitter positioned within said complex optical cavity and dividing said complex optical cavity into: wherein the beamsplitter is positioned such that the first cavity part is on one side of the beamsplitter and the second cavity part is on the other side of the beamsplitter, whereby the first cavity part provides a lower power level at the fundamental frequency ω and the second cavity part, being a resonant reflector at the fundamental frequency with respect to the first cavity part, provides a higher power level at the fundamental frequency ω to provide for an increase of the power of the second harmonic beam formed in the nonlinear crystal by the second harmonic generation process, the second harmonic beam being reflected by the beamsplitter as the laser output.