Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 43: Poster II

Q 43.15: Poster

Wednesday, March 20, 2013, 16:00–18:30, Empore Lichthof

Whispering gallery mode resonators made from BBO — Guoping Lin¹, •Josef Urban Fürst^1,2, Dmitry Strekalov¹, Ivan Grudinin¹, and Nan Yu¹ — ¹Jet Propulsion Laboratory, California Institute of Technology. Pasadena, California, USA — ²Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg. Erlangen, Germany

We demonstrate the first whispering gallery resonators made from the nonlinear crystal beta barium borate. Quality factors were measured at various optical wavelengths and they exceeded 10⁸ in the ultraviolet wavelength regime. From these measurements we inferred new upper bounds for the absorption coefficients of beta barium borate at 1560 nm, 980 nm and 370 nm. Additionally, the polarization properties of the resonances in this angle-cut birefringent resonator were characterized. With these measurements, we laid the basis to combine the outstanding properties of whispering gallery resonators with the nonlinear optical properties of beta barium borate. This offers novel applications for whispering gallery resonators in nonlinear optics in the ultraviolet wavelength regime.