A 350 MHz Ti:sapphire laser comb based on monolithic scheme and absolute frequency measurement of 729 nm laser.
We realized a novel frequency comb based on femtosecond Ti:sapphire laser with 350 MHz repetition rate and monolithic scheme for carrier-envelope-offset frequency generation. Long-term stabilization of more than 9 hours was demonstrated by simultaneously locking repetition rate (f(rep)) and carrier-envelope-offset frequency (f(ceo)) to an atomic clock. The Allan deviations of f(ceo) and f(rep) are 2.3 x 10(-13) and 1.5 x 10(-15) at 100 s averaging time, respectively, and the reproducibility of f(ceo) with high accurate performance is also verified by comparison of the locking results recorded in 3 different days. By avoiding the extra noise induced by photonic crystal fiber, we obtained the accumulated phase error increase from in-loop to out-of-loop as small as 12 mrad [1 Hz, 100 kHz]. Furthermore, the absolute optical frequency of a stabilized 729 nm Ti:sapphire laser which is referenced to a ultra-low expansion (ULE) cavity is measured by the comb and determined to be 411041985391583+/-10 Hz.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.
Wei
W
Zhang
Hainian
H
Han
Yanying
Y
Zhao
Qiang
Q
Du
Zhiyi
Z
Wei
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007834:Lasers; D009991:Oscillometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity