TY  - JOUR
A1  - Skoczowsky, Danilo
A1  - Jechow, Andreas
A1  - Stürmer, Herbert
A1  - Poßner, Torsten
A1  - Sacher, Joachim
A1  - Menzel, Ralf
T1  - Quasi-monolithic ring resonator for efficient frequency doubling of an external cavity diode laser
N2  - A quasi-monolithic second-harmonic-generation ring resonator assembled with miniaturized components is presented. The ring contains a 10-mm-long bulk periodically poled lithium niobate crystal for second-harmonic generation, four plane mirrors and two gradient-index lenses. All parts are mounted on a glass substrate with an overall size of 19.5 mmx8.5 mmx4 mm. As pump source a broad-area laser diode operated in an external resonator with Littrow arrangement is utilized. This external cavity diode laser provides near diffraction limited, narrow-bandwidth emission with an optical output power of 450 mW at a wavelength of 976 nm. Locking of the diode laser emission to the resonance frequency of the ring cavity was achieved by an optical self-injection locking technique. With this setup more than 126 mW of diffraction-limited blue light at 488 nm could be generated. The opto-optical conversion efficiency was 28% and a wall plug efficiency better than 5.5% could be achieved.
Y1  - 2010
UR  - http://www.springerlink.com/content/100502
U6  - https://doi.org/10.1007/s00340-009-3802-7
SN  - 0946-2171
ER  -