Patent ID: 6859469
Filing Date: 2005-02-22
Classification: H01S

Abstract:
1. A laser system, comprising: a laser capable of producing a beam of output light; a detector unit; a fringe-producing optical element disposed in the beam of output light to direct a first portion of the beam of output light to the detector unit as a second light beam, the fringe-producing optical element comprising one of a diffractive etalon or a non-parallel etalon, the non-parallel etalon comprising one of a non-planar etalon or a Fresnel etalon, an interference fringe pattern being produced in the second light beam by the fringe-producing optical element, a second portion of the output light beam, different from the first portion, propagating from the fringe-producing optical element; and a control unit coupled to receive detector information front the detector unit and coupled to the laser to control the wavelength of the beam of output light in response to the information received from the detector unit.