Frequency doubling of picosecond pulses generated by a monolithic DFB tapered MOPA in a ppMgO:LN channel waveguide

D. Jedrzejczyk; S. Riecke; R. Güther; K. Lauritsen; K. Paschke

doi:10.1117/12.886835

18 May 2011 Frequency doubling of picosecond pulses generated by a monolithic DFB tapered MOPA in a ppMgO:LN channel waveguide

D. Jedrzejczyk, S. Riecke, R. Güther, K. Lauritsen, K. Paschke

Author Affiliations +

Proceedings Volume 8071, Nonlinear Optics and Applications V; 80710N (2011) https://doi.org/10.1117/12.886835
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

In this work, we investigate experimentally second-harmonic generation (SHG) of pulsed near-infrared (NIR) diode laser radiation in a nonlinear crystal with a ridge waveguide structure. Pulses at 1064 nm with a pulse energy of 560 pJ, a peak power of 3.2 W and a pulse length of 138 ps are generated at a repetition rate of 10 MHz by a monolithic DFB (Distributed Feedback) tapered MOPA (Master Oscillator Power Amplifier). For frequency doubling, a periodically poled MgO-doped lithium niobate crystal with a ridge waveguide structure is used. During SHG, a dependence of the second-harmonic (SH) pulse duration on the NIR pulse energy as well as a distinctive influence of the waveguide structure on the beam quality is observed. A maximum SH peak power at 532 nm of 0.75 W and an opto-optical conversion efficiency of 24 % are achieved. Furthermore, an influence of the spectral distribution of the NIR laser radiation on the SHG conversion efficiency is observed.

Citation Download Citation

D. Jedrzejczyk, S. Riecke, R. Güther, K. Lauritsen, and K. Paschke "Frequency doubling of picosecond pulses generated by a monolithic DFB tapered MOPA in a ppMgO:LN channel waveguide", Proc. SPIE 8071, Nonlinear Optics and Applications V, 80710N (18 May 2011); https://doi.org/10.1117/12.886835

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