Patent ID: 7471707
Filing Date: 2008-12-30
Classification: H01S

Abstract:
1. An intra cavity frequency-doubling laser, comprising: a gain medium having a first optical axis, the gain medium configured to produce a fundamental lasing light at a fundamental wavelength λ along a light propagation direction, wherein the first optical axis is substantially perpendicular to the light propagation direction; a nonlinear frequency-doubling medium configured to produce a frequency-doubling lasing light in response to the fundamental lasing light, wherein the nonlinear frequency-doubling medium has a second optical axis substantially perpendicular to the light propagation direction and offsetting at a first non-zero angle relative to the first optical axis; and a birefringent medium separate from the gain medium and the nonlinear frequency-doubling medium, wherein the birefringent medium has a third optical axis offsetting at a second non-zero angle relative to the first optical axis, wherein the third optical axis is substantially parallel to the second optical axis, and a combined optical retardation of the non-linear frequency-doubling medium and the birefringent medium is (m+q)λ wherein m is an integer and q is substantially ¼.