Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 14: Ultrakurze Pulse: Erzeugung II

Q 14.9: Vortrag

Montag, 2. März 2009, 18:30–18:45, VMP 8 R206

Modeling Non-collinear Optical Parametric Chirped-Pulse Amplification — •Jiaan Zheng and Helmut Zacharias — Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str.10, 48149 Münster, Germany

Due to the extremely broad spectral acceptance bandwidth non-collinear optical parametric chirped-pulse amplification (NOPCPA) is a promising technique to generate intense pulses with few-cycle pulse duration [1]. In this talk, a new model to describe the parametric process of three-wave interaction in the non-collinear optical parametric chirped-pulse amplification (NOPCPA) is presented, in which the effects from the non-collinear configuration have been taken into account. By utilizing this new model, a two-stage NOPCA system based on BBO with type I phase matching is numerically calculated with a split-step Fourier transform algorithm. Tracing the dynamic process of pump, signal and idler in the crystal reveals that in the beginning stage gain narrowing occurs due to the weak input signal intensity and the non-uniform temporal distribution of the pump light. However, in the saturation regime the spectrum of the signal will be broadened as a consequence of the back conversion process. The simulation shows that it is crucial to correctly control the experimental parameters to balance both processes. [1] F. Tavella, Y. Nomura, L. Veisz, V. Pervak, A. Marcinkevičius and F. Krausz, Opt. Lett. 32, 2227 (2007)