Patent ID: 7177332
Filing Date: 2007-02-13
Classification: H01S

Abstract:
1. A laser frequency stabilization device comprising: a cell into which gas is charged, an ECDL, a laser frequency adjusting means for adjusting the frequency of laser a beam emitted from said ECDL, a laser beam dividing means for dividing the laser beam from said ECDL into a pump beam and a probe beam, an ON/OFF means for cutting off the pumping beam at a constant time interval, a photo detector for measuring intensity of the probe beam after the probe beam is passed through said cell continuously and said pumping beam is passed through at intervals, a computing means for obtaining the intensity of the probe beam detected by said photo detector, a demodulated signal of the probe beam, a difference in intensity of the probe beam between a case in which the pumping beam is ON and OFF, and a difference in demodulated signal, a feedback means for feeding back information concerning the difference in the demodulated signal obtained by said computing means, to said laser frequency adjusting means which thereby stabilizes the frequency of said ECDL based on said information, a first optical setup for introducing the probe beam into a flat surface of said cell, and a second optical setup for introducing the pumping beam into a side surface of said cell.