Patent ID: 7532649
Filing Date: 2009-05-12
Classification: H01S,H05G

Abstract:
1. An apparatus comprising: an optical cavity comprising first and second mirrors, said first mirror being substantially planar, said cavity providing an optical path between the mirrors; a source of optical pulses coupled to introduce optical energy into said cavity along said optical path; an optical element disposed in said optical path such that a beam waist of the optical energy is disposed between the optical element and the second mirror; a first transducer which adjusts the distance between said second mirror and said optical element to change a characteristic of said waist, said change in said waist changing the length of the optical path; and a second transducer which adjusts the distance between said first planar mirror and said second mirror to change the optical path length, wherein said optical cavity is arranged such that the change in path length due to the second transducer does not significantly affect said characteristic of the waist.