Patent ID: 8879589
Filing Date: 2014-11-04
Classification: G02F,H01S

Abstract:
1. A laser system comprising: a laser oscillator for providing a first optical beam at a first optical frequency; a frequency converting element coupled to the laser oscillator, for converting the first optical beam into a second optical beam at a second optical frequency different from the first optical frequency, wherein a pointing angle of the second optical beam is dependent on the first optical frequency; a beamsplitter coupled to the frequency converting element, for splitting a portion of the second optical beam; a position-sensitive detector coupled to the beamsplitter, for receiving the portion of the second optical beam for detecting a deviation of the pointing angle of the second optical beam; and a controller coupled to the position-sensitive detector and to the laser oscillator, configured for adjusting, at a first adjustment rate, the first optical frequency of the laser oscillator, so as to lessen the deviation of the pointing angle of the second optical beam.