Conference Paper

Frequency comparison of two fiber-based frequency combs at 633 nm

Nat. Metrol. Inst. of Japan (NMIJ), AIST, Tsukuba
DOI: 10.1109/CPEM.2008.4574776 Conference: Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Source: IEEE Xplore

ABSTRACT Two fiber-based frequency combs were compared at 633 nm. An offset laser was locked to a frequency comb, and the locked laser was measured with another comb. Consequently, the frequency uncertainty of the combs was less than 3 times 10-16 at 10 000 s averaging, which is sufficiently lower than the uncertainty of UTC.

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    ABSTRACT: A fiber-based frequency comb has been developed to measure the frequency of a 633-nm iodine-stabilized laser at the National Metrology Institute of Japan (NMIJ). The measured frequency was consistent with the previous results measured with a Ti:sapphire-based comb. The NMIJ comb was shipped to Australia for the validation of the measurement capability of the National Measurement Institute, Australia (NMIA) and NMIJ combs using a common microwave reference and a common optical frequency. Consequently, the frequency consistency of the two combs was approximately 8 times10<sup>-17</sup>. Furthermore, we demonstrate that an absolute mode number of the comb can easily and clearly be determined by using the two combs.
    IEEE Transactions on Instrumentation and Measurement 05/2009; DOI:10.1109/TIM.2008.2008589 · 1.71 Impact Factor