Title :
Referencing femtosecond laser frequency combs to a He-Ne/CH4 optical frequency standard
Author :
Kovalchuk, Evgeny V. ; Peters, Achim
Author_Institution :
Inst. fur Phys., Humboldt-Univ. zu Berlin, Berlin, Germany
Abstract :
The combination of a cw OPO and femtosecond laser frequency combs enables several different approaches for the realization of CH4 optical molecular clocks. These are based on a fs Ti:sapphire or an Er-fiber laser comb, whose repetition rate frequency is phase locked to the frequency of the He-Ne/CH4 standard. Both systems can also be operated in reverse mode for precise optical synthesis and high-resolution spectroscopy in the mid-infrared and telecom spectral ranges.
Keywords :
atomic clocks; erbium; frequency standards; gas lasers; high-speed optical techniques; optical parametric oscillators; sapphire; titanium; Al2O3:Ti; continuous-wave optical parametric oscillator; erbium-fiber laser comb; femtosecond laser frequency combs; high-resolution spectroscopy; optical frequency standard; optical molecular clocks; optical synthesis; Clocks; Frequency; Laser mode locking; Laser stability; Optical harmonic generation; Optical pumping; Pump lasers; Spectroscopy; Standards development; Ultrafast optics;
Conference_Titel :
Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. IEEE International
Conference_Location :
Besancon
Print_ISBN :
978-1-4244-3511-1
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2009.5168380
