Abstract
Green laser light sources emitting picosecond (ps) pulses (τFWHM < 200 ps) at arbitrary repetition rates in the MHz range with a moderate pulse energy (E > 50 pJ) and a good beam quality (M2≈1) are desired for applications such as time-resolved fluorescence spectroscopy. Frequency doubling of gain-switched near-infrared (NIR) diode lasers in a nonlinear crystal enables the generation of suitable ps pulses in this spectral region [1]. However, even gain-switched distributed-feedback (DFB) lasers have relatively broad spectra [1], so the acceptance bandwidth of the second-harmonic generation (SHG) process has to be kept large. This limits the crystal length and the corresponding conversion efficiency [1]. Waveguide structures feature a much higher conversion efficiency than bulk crystals at an equal length and are therefore better suited for frequency doubling of spectrally broad radiation.
© 2011 Optical Society of America
PDF ArticleMore Like This
T. Schönau, K. Lauritsen, S. M. Riecke, T. Eckhardt, and R. Erdmann
CJ_P1 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2011
T. Schönau, K. Lauritsen, S. M. Riecke, R. Erdmann, S. McNeil, and P. Battle
JThB93 CLEO: Applications and Technology (CLEO:A&T) 2011
C. Vicario, A. Trisorio, C.P. Hauri, and G. Arisholm
CD2_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2011