Patent ID: 6614584
Filing Date: 2003-09-02
Classification: G02F,H01S

Abstract:
A laser system, comprising:a laser source for emitting an original laser beam at a fundamental frequency; an orientationally adjustable nonlinear optical crystal for converting a portion of the original laser beam to a converted beam including a higher harmonic frequency component and outputting a converted output beam; a first position sensitive detector and a second position sensitive detector; a first spectral filter before the first detector for filtering out the higher harmonic frequency component of the converted beam received at said first detector; a second spectral filter before the second detector for filtering out the fundamental component of the converted beam received at said second detector; and a controller for receiving a first signal from said first detector wherein said first signal corresponds to the shape and position of the fundamental component, and the controller for receiving a second signal from said second detector, wherein said second signal corresponds to the shape and position of the converted beam signal, wherein the controller is operative to perform a comparison of the first signal and second signal which is indicative of a phase matching error of said beam through said crystal, and the controller is for controlling an orientation of said crystal based on the comparison to substantially a phase matching condition.