Abstract
We demonstrate a new, simple technique for measuring IR frequencies near 30 THz by using a femtosecond (fs) laser optical comb and sum-frequency generation. The optical frequency is directly compared with the distance between two modes of the fs laser, and the resultant beat note is used to control this distance, which depends only on the repetition rate of the fs laser. The absolute frequency of a laser stabilized onto a two-photon line has been measured for the first time to the authors’ knowledge. This line is an attractive alternative to the usual saturated absorption resonances used for the stabilization of lasers. First results demonstrate a fractional Allan deviation of at 1 s.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Hsiang-Chen Chui, Ming-Sheng Ko, Yi-Wei Liu, Jow-Tsong Shy, Jin-Long Peng, and Hyeyoung Ahn
Opt. Lett. 30(8) 842-844 (2005)
Marcus Zimmermann, Christoph Gohle, Ronald Holzwarth, Thomas Udem, and Theodor W. Hänsch
Opt. Lett. 29(3) 310-312 (2004)
Jie Jiang, Atsushi Onae, Hirokazu Matsumoto, and Feng-Lei Hong
Opt. Express 13(6) 1958-1965 (2005)