Abstract

We report on a novel high-sensitivity method to characterize and improve mode matching into optical cavities. This method is based on heterodyne detection of cylindrical transverse cavity modes. A specially designed annular-segmented photodiode is used to measure the amplitude of nonresonant modes reflected by the cavity. Our measurements allow us to optimize cavity mode matching to nearly 99.98% and will play an important diagnostic role in gravitational-wave detectors.

© 2000 Optical Society of America

[Optical Society of America ]

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Author Affiliations

Guido Mueller, Qi-ze Shu, Rana Adhikari, D. B. Tanner, David Reitze

Department of Physics, University of Florida, Gainesville, Florida 32611-8440

Daniel Sigg

LIGO Hanford Observatory, P.O. Box 1970 S9-02, Richland, Washington 99352

Nergis Mavalvala, Jordan Camp

LIGO Project, California Institute of Technology, MS 18-34, Pasadena, California 91125

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