Mainz 1997 – scientific programme
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Q: Quantenoptik
Q 33: Quanteneffekte IV
Q 33.2: Talk
Wednesday, March 5, 1997, 16:15–16:30, N 3
Noise measurements of a high-finesse cavity with a moving mirror — •I. Tittonen1, G. Breitenbach1, Th. Kalkbrenner1, Th. Müller1, R. Conradt1, S. Schiller1, E. Steinsland2, N. Blanc2, and N. de Rooij2 — 1Fakult"at f"ur Physik, Universit"at Konstanz, 78434 Konstanz, http://quantum-optics.physik.uni-konstanz.de — 2Institute of Microtechnology, University of Neuchâtel, Switzerland
We describe experiments on the noise properties of a high-finesse Fabry-Perot interferometer consisting of a rigid incoupling mirror and a low-mass moving mirror. The moving mirror is a monocrystalline silicon oscillator with a very high mechanical Q factor at the resonance frequency of 26 kHz. The Q factor was determined by piezoelectric excitation followed by a measurement of the decay time. We observed Q factors as high as 4.3 million for a torsional mode at cryogenic temperatures. The mirror vibration is read out by a monolithic Nd:YAG laser frequency stabilized to the fundamental mode of the cavity using a Pound-Drever locking scheme. First measurements of the noise properties of the combined mechanical/optical system are discussed.