Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.56: Poster

Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof

Optical resonators with ultra-high frequency stability using AlGaAs coatings — •Sana Amairi Pyka, Moritz Nagel, Klaus Döringshoff, Sylvia Schikora, Evgeny V. Kovalchuk, and Achim Peters — Humboldt-Universität zu Berlin, Institut für Physik, AG Optische Metrologie, Newtonstraße 15, 12489 Berlin

We present the study of the thermal noise limited performance of two orthogonal cavities implemented in a single block of fused silica. The fused silica mirror substrates of both cavities are coated with high-reflectivity monocrystalline AlGaAs coating. The common mode suppression of systematic effects in this system allows us the study of the thermal noise limit in both cavities via the comparison of two stabilized laser frequencies. The presentation will include details on the AlGaAs coating finesse, optical performance and frequency stability results. The AlGaAs mirror coating present an alternative for lower thermal noise limit in cavity stabilized sub-Hertz linewidth lasers as well as in the field of gravitational wave detection.