G. Bianchini et al., WIDE-BANDWIDTH FREQUENCY LOCKING OF A 1083-NM EXTENDED-CAVITY DBR DIODE-LASER TO A HIGH-FINESSE FABRY-PEROT RESONATOR, Applied physics. B, Lasers and optics, 66(4), 1998, pp. 407-410
We report frequency locking of a 1083-nm DBR diode laser on a high-fin
esse Fabry-Perot cavity (F similar or equal to 2800). We used the Poun
d-Drever FM locking scheme at a modulation rate of 5 MHz. A lock bandw
idth of about 1 MHz is obtained by using a three-path servo loop. The
laser linewidth is narrowed to similar to 5 kHz. The root Allan varian
ce sigma(tau) of the laser frequency with respect to the cavity reache
s a minimum of 4 +/- 1 Hz at tau = 10 s.