M. Marano et al., Absolute frequency stabilization of a tunable Tm : Ho : YAG laser to the HBrP(12) line at 2097 nm, OPTICS LETT, 25(23), 2000, pp. 1702-1704
We demonstrate absolute frequency stabilization of a widely tunable Tm:Ho:Y
AG laser by locking the oscillator to the P(12) absorption line of the (HBr
)-Br-79 molecule at 2097.222 nm, using the fringe side-locking technique. W
e perform time and spectral analysis of open- and closed-loop error signals
to evaluate the frequency noise. In closed-loop operation a long-term freq
uency stability of better than 2 MHz with rms frequency fluctuations of sim
ilar to 112 kHz is obtained over an observation time of 10(3) s. (C) 2000 O
ptical Society of America.