400 mW external cavity diode laser with narrowband emission at 445 nm
Opt. Lett., vol. 39, no. 13, pp. 3794-3797 (2014).
© Copyright 2014 The Optical Society. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the Optical Society.
A high-power external cavity diode laser (ECDL) system with narrowband emission is presented. The system is based on a commercially available high-power GaN laser diode. For the ECDL, a maximum optical output power of 400 mW in continuous-wave operation with narrowband emission is achieved. Longitudinal mode selection is realized by using a surface diffraction grating in Littrow configuration. A spectral width of 20 pm at 445 nm with a side-mode suppression ratio larger than 40 dB is achieved. This concept enables diode laser systems suitable for subsequent nonlinear frequency conversion into the UV spectral range.
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
(050.1950) Diffraction and gratings : Diffraction gratings; (140.2020) Lasers and laser optics : Diode lasers; (140.4780) Lasers and laser optics : Optical resonators; (140.3425) Lasers and laser optics : Laser stabilization.