Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 5: Laser Development: Nonlinear Effects I

Q 5.5: Vortrag

Montag, 8. März 2010, 15:00–15:15, F 128

Second Harmonic Generation in a Whispering Gallery Mode Resonator — •Josef Fürst^1,2, Dmitry Strekalov³, Dominique Elser^1,2, Mikael Lassen^1,4, Ulrik L. Andersen^1,4, Christoph Marquardt^1,2, and Gerd Leuchs^1,2 — ¹Max-Planck-Institut für die Physik des Lichts, Erlangen, Deutschland — ²Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Erlangen, Deutschland — ³Jet Propulsion Laboratory, California lnstitute of Technology, Pasadena, USA — ⁴Department of Physics, Technical University of Denmark, Kgs. Lyngby, Dänemark

We present second harmonic generation(SHG) in a z-cut Lithium Niobate whispering gallery mode (WGM) resonator. Our WGM resonator has Q-factors of Q=10⁷ for 1064 nm and 532 nm. Therefore nonlinear processes become efficient for very low optical powers. We apply non-critical temperature phase matching. We observed 9% conversion efficiency at 30 micro-Watts continuous wave input power for the SHG process. Additionally, we found a self-limiting effect at high pump power and over-coupled resonator. We will explore this effect further and aim for investigating dynamcial effects in the second order response of media, such as self pulsing and chaos.