Patent ID: 9164027
Filing Date: 2015-10-20
Classification: G01J,G01N,H01S

Abstract:
1. Frequency tunable laser system comprising a laser with first and second reflective surfaces defining a laser cavity with a laser gain medium between the first and second reflective surfaces, wherein the second reflective surface is semi-transparent for emitting, in use, a laser beam from the second surface; frequency varying means arranged for varying an optical frequency output of the laser; an intensity sensor arranged for receiving light from the laser and providing an intensity signal that is indicative of an intensity output of the light from the laser; a processor arranged for the frequency tunable laser system further comprises an external reflective surface, in use, fixedly arranged in a light path of the laser beam outside the laser cavity at a predefined distance from the second reflective surface along the light path of the laser beam to reflect part of the emitted laser beam back into the laser cavity; and wherein the processor is further arranged for