Patent ID: 6928099
Filing Date: 2005-08-09
Classification: B82Y,H01S

Abstract:
1. An apparatus for frequency conversion of light, the apparatus comprising: (a) a light-emitting device for emitting a light having a first frequency, said light-emitting device being an edge-emitting semiconductor light-emitting diode having an extended waveguide selected such that a fundamental transverse mode of said extended waveguide is characterized by a low beam divergence; (b) a light-reflector, constructed and designed so that said light passes a plurality of times through an external cavity, defined between said light-emitting device and said light-reflector, and provides a feedback for generating a laser light having said first frequency; and (c) a non-linear optical crystal positioned in said external cavity and selected so that when said laser light having said first frequency passes a plurality of times through said non-linear optical crystal, said first frequency is converted to a second frequency being different from said first frequency.