Abstract
In this Letter, we propose and demonstrate an external-cavity diode laser in second-order Littrow configuration. This topology utilizes a low-efficiency diffraction grating to establish a high-finesse external cavity, strong optical feedback, a high polarization discrimination, and a circular output mode. In our proof-of-concept experiment, we realized a cavity with a finesse of 1855, being, to the best of our knowledge, the highest value ever reported for a three-port–grating-coupled cavity. With optical feedback, the laser threshold of the laser diode employed was reduced by a factor of 4.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Michael Britzger, Maximilian H. Wimmer, Alexander Khalaidovski, Daniel Friedrich, Stefanie Kroker, Frank Brückner, Ernst-Bernhard Kley, Andreas Tünnermann, Karsten Danzmann, and Roman Schnabel
Opt. Express 20(23) 25400-25408 (2012)
N. Ruhnke, A. Müller, B. Eppich, M. Maiwald, B. Sumpf, G. Erbert, and G. Tränkle
Opt. Lett. 39(13) 3794-3797 (2014)
Lucia Duca, Elia Perego, Federico Berto, and Carlo Sias
Opt. Lett. 46(12) 2840-2843 (2021)