We demonstrate a significant improvement when referencing a frequency comb to an acetylene stabilized fiber laser as compared to a GPS-disciplined Rb clock reference. The Stabilaser 1542 is a compact, maintenance-free stand-alone acetylene stabilized fiber laser with a narrow linewidth and an Allan deviation of 3E-13 and 4E-14 in 1 s and 10000 s, respectively. Switching the comb reference from the Rb clock to the Stabilaser 1542 improves both comb linewidth and Allan deviation by about two orders of magnitude. Furthermore, long-term measurements of the Stabilaser 1542 frequency with reference to the GPS-disciplined clock indicate a potential accuracy of 1E-12.
Thomas Talvard, Nicolai F. Mortensen, Bjarke Gøth, Philip G. Westergaard, Michael V. DePalatis, Michael Drewsen, and Jan Hald, "Stabilization and line narrowing of a frequency comb locked to an acetylene stabilized fibre laser (Conference Presentation)," Proc. SPIE 10119, Slow Light, Fast Light, and Opto-Atomic Precision Metrology X, 1011907 (Presented at SPIE OPTO: January 30, 2017; Published: 28 April 2017); https://doi.org/10.1117/12.2249185.5397463842001.
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