Patent ID: 9482928
Filing Date: 2016-11-01
CPC Classification: G02F

Claim Text:
1. An apparatus for servo-locking an angular orientation of a nonlinear crystal with respect to the direction of an input laser beam comprising: a crystal mount assembly to support said nonlinear crystal in a rotatable optic mount, said nonlinear crystal adapted to generate from the input laser beam an output beam with a converted frequency component; an energy detector and an A/D converter for generating an output power level in response to an intensity of said converted frequency component of said output beam; a computer controller for producing a an feedback electrical signal representative of the output power level a rotational assembly including a shape memory alloy (SMA) assembly for angularly rotating said rotatable mount in response to said representative electrical feedback signal; and a locking mechanism in operative contact with the rotational assembly and configured to secure the rotational assembly, the locking assembly further configured to release the rotational assembly in response to an electrical signal to allow angular rotation of the rotatable mount.