[OPTICAL REVIEW Vol. 18, No. 4 (2011) 365-366]
© 2011 The Japan Society of Applied Physics

Selective Detection of Minor Isotope Lines in Saturated Absorption Spectra by Absorption Filtering of Major Isotope Lines

Yugo ONODA1*, Kazuhiko SUGIYAMA1,2, and Masao KITANO1,2

1Graduate School of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
2Core Research for Evolutional Science and Technology, Japan Science and Technology Corporation, Kawaguchi, Saitama, Japan

(Received February 26, 2011; Accepted April 13, 2011)

We demonstrate a simple method that can be used to detect minor isotope lines in a saturated absorption spectrum by the absorption filtering of major isotope lines. We investigate this method for use in the spectroscopy of the 1S01P1 transition in Yb at 399 nm by controlling the density of Yb atoms by varying the discharge current of a hollow cathode lamp. The performance of an extended-cavity laser diode using a high-power ultraviolet diode chip is also analyzed.

Key words: saturated absorption spectroscopy, ytterbium, minor isotope, ultraviolet laser diode, isotope shift

*E-mail address: onoda@giga.kuee.kyoto-u.ac.jp