FREQUENCY MEASUREMENT OF A 532-NM IODINE-STABILIZED LASER USING AN OPTICAL FREQUENCY COMB LINKED TO UTC (NMIJ)

Kazuhiko Kawasaki, Shinichiro Yanaka, Kaoru Miyata, Hajime Inaba, Feng-Lei Hong

Abstract

We developed an optical frequency comb system (the Mitutoyo comb) synchronized to a rubidium (Rb) based frequency standard oscillator which is linked to the Coordinated Universal Time (UTC) operated by the National Metrology Institute of Japan (NMIJ). We measured the frequency of an iodine stabilized laser at 532 nm which is listed as a wavelength standard for length applications. The frequency measurement results taken by the Mitutoyo comb was compared with the results using another frequency comb system developed by NMIJ (the NMIJ comb). When a common laser frequency was measured by the two systems simultaneously, the frequency difference between these measurement results is 0.17 kHz (6.0 × 10^-13). To investigate the origin of the difference, we measure a common laser by using the two combs referring a common frequency reference, and the difference between these results is 0.1 Hz (3.6 × 10^-16). Therefore, the measurement uncertainty of the Mitutoyo comb is dominated by the uncertainty of the Rb frequency standard.

Keywords

optical frequency comb, frequency standard, frequency measurement

Download

IMEKO-TC14-2014-56.pdf

DOI

-

IMEKO TC

TC14 - Measurement of Geometrical Quantities

Back to the proceedings