Abstract
A new external-cavity diode laser system based on an extended version of the Littman configuration is investigated. In our laser system the tuning mirror is replaced with a second grating mounted at the Littrow angle. This double-grating design provides a smaller passive bandwidth than the grating-mirror configuration, which is used to compensate for the large angle-of-incidence-dependent losses of the grazing-incidence grating. This results in a broader continuous tuning range with an improved mode stability. Because two laser diodes, emitting at 820 and 775 nm, respectively, are used, the external-cavity laser is continuously tunable without mode hops across 35 nm at 820 nm and 27 nm at 775 nm. Such a laser was used to measure the absorption lines of the oxygen A band around 762 nm. The complete - and -rotational branches of the transition were recorded in a single-wavelength scan.
© 1997 Optical Society of America
Full Article | PDF ArticleOSA Recommended Articles
Lars Nilse, Hillary J. Davies, and Charles S. Adams
Appl. Opt. 38(3) 548-553 (1999)
Erjun Zang, Shaokai Wang, Yang Zhao, Yu Peng, Tao Yang, Ye Li, Jianping Cao, Tianchu Li, and Zhanjun Fang
Appl. Opt. 50(26) 5080-5084 (2011)
Rebecca Merrill, Rebecca Olson, Scott Bergeson, and Dallin S. Durfee
Appl. Opt. 43(19) 3910-3914 (2004)