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Temperature Sensors Based on WGM Optical ResonatorsA proposed technique for measuring temperature would exploit differences between the temperature dependences of the frequencies of two different electromagnetic modes of a whispering gallery-mode (WGM) optical resonator. An apparatus based on this technique was originally intended to be part of a control system for stabilizing a laser frequency in the face of temperature fluctuations. When suitably calibrated, apparatuses based on this technique could also serve as precise temperature sensors for purposes other than stabilization of lasers. A sensor according to the proposal would include (1) a transparent WGM dielectric resonator having at least two different sets of modes characterized by different thermo-optical constants and (2) optoelectronic instrumentation for measuring the difference between the temperature-dependent shifts of the resonance frequencies of the two sets of modes.
Document ID
20080047193
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other - NASA Tech Brief
Authors
Savchenkov, Anatoliy
(California Inst. of Tech. Pasadena, CA, United States)
Yu, Nan
(California Inst. of Tech. Pasadena, CA, United States)
Maleki, Lute
(California Inst. of Tech. Pasadena, CA, United States)
Itchenko, Vladimir
(California Inst. of Tech. Pasadena, CA, United States)
Matsko, Andrey
(California Inst. of Tech. Pasadena, CA, United States)
Strekalov, Dmitry
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
November 1, 2008
Publication Information
Publication: NASA Tech Briefs, November 2008
Subject Category
Optics
Report/Patent Number
NPO-44469
Distribution Limits
Public
Copyright
Public Use Permitted.
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