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Proceedings Paper

Error Sources In The "Ring Down" Optical Cavity Decay Time Mirror Reflectometer
Author(s): Thomas M. Crawford
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Paper Abstract

The "ring down" reflectometer is used to determine mirror reflectances and cavity losses in low loss situations. This is done by measuring the decay time of an optical cavity and relating this decay time to the total loss of the optical cavity. Unfortunately, this reflectometer has several sources of error that may cause problems for the unwary user. Measurement errors may arise from three different sources: (1) not having the source laser and the passive optical cavity tuned to each other properly, (2) having frequency drift in the passive optical cavity, and (3) simultaneously exciting two cavity modes that are close in frequency. In this paper, the theory of the "ring down" reflectometer is developed and analyzed for the purpose of determining its major error sources. The resulting problems are shown and solutions to these problems are suggested.

Paper Details

Date Published: 20 November 1985
PDF: 8 pages
Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); doi: 10.1117/12.976129
Show Author Affiliations
Thomas M. Crawford, Litton Industries (United States)


Published in SPIE Proceedings Vol. 0540:
Southwest Conf on Optics '85
Susanne C. Stotlar, Editor(s)

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