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Published April 2004 | public
Journal Article Open

Fundamental thermal fluctuations in microspheres

Abstract

We present a theoretical analysis and the results of measurements of thermorefractive noise in microcavities. These measurements may be considered direct observations of fundamental fluctuations of temperature in solid media. Our experimentally measured noise spectra are in agreement with our theoretical model.

Additional Information

© 2004 Optical Society of America Received June 16, 2003; revised manuscript received October 6, 2003; accepted November 11, 2003 We are grateful to V. B. Braginsky, whose initial idea to measure thermorefractive noise in microspheres is embodied in this paper. We especially thank S. P. Vyatchanin and F. Ya. Khalili for stimulating and fruitful discussions. This research was partially supported by National Science Foundation grant PHY-0098715 and by President of the Russian Federation grants for young scientists MD-208.2003.02 and NS-1318.2003.2.

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