Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.56: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG2

Frequency Doubling of Fiber Amplified Picosecond Laserpulses for Ion Beam Cooling — •Christian Kühnel, Daniel Kiefer, and Thomas Walther — TU Darmstadt, Institut für Angewandte Physik, Laser- und Quantenoptik, Schlossgartenstr. 7, 64289 Darmstadt

White light cooling is an efficient way for reducing the phase space density of relativistic bunched ion beams [1]. For this purpose we present pulsed SHG in a noncritical phase-matched lithiumniobate crystal. The pulses are provided by a MOPA system with flexible pulse duration.

The MOPA system delivers pulses at 1030 nm and a repetition rate of up to 1.5 MHz. The pulse duration is variable between 70 and 740 ps and switchable to 50 ns. The setup for SHG is typically done for one specific set of laser parameters. However, here it needs to be variable, since the pulse length is tunable. Therefore, the peak power differs so that exceeding damage thresholds and varying SHG efficiencies have to be considered. The current status of the system is presented compared with theoretical and numerical predictions [2]. In addition the future development will be shown. [1] S. N. Atutov. Phys. Rev. Lett. 80 (1998), 2129-2132. [2] H. Wang and A. M. Weiner, IEEE Journal of Quantum Electronics, vol. 39, no. 12, 1600-1618.