Active stabilization system for Fabry-Perot interferometers

Details Active stabilization system for Fabry-Perot interferometers Active stabilization system for Fabry-Perot interferometers

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apopt..28.5275h&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 28, Dec. 15, 1989, p. 5275-5277.

Physics

Optics

3

Fabry-Perot Interferometers, Feedback Control, Optical Filters, Optical Paths, Semiconductor Lasers, Systems Stability, Stress Analysis, Telescopes

Scientific paper

Astronomical Fabry-Perot interferometers (FPIs) face harsher conditions than laboratory ones. Mechanical stresses from the motion of the telescope, uncontrollable temperature changes, and the frequent removal and replacement of the device from the optical path can alter the delicate alignment of the instrument. Here, an optical technique is described to monitor and stabilize the cavity spacing of a FPI, allowing it to be used as a tunable filter. The system has been successfully used at the 5-m Hale telescope on Mt. Palomar.

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