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Ultraviolet Sensor Based on a Silica Optical Microresonator

Published online by Cambridge University Press:  30 July 2014

Simin Mehrabani,
Audrey Harker and
Andrea Armani
Simin Mehrabani
Affiliation:
Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, U.S.A.
Audrey Harker
Affiliation:
Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, U.S.A.
Andrea Armani
Affiliation:
Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, U.S.A.
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Abstract

It is well known that exposure to ultraviolet (UV) light can result in various physical and psychological diseases. Therefore, there is a strong demand for a reliable sensor to monitor UV exposure levels in the physiologically relevant intensity ranges of mW/cm2. Here, we demonstrate a UV sensor based on a silica whispering gallery mode microresonator. This UV sensor works over physiologically relevant intensity ranges with linear performance both in the forward and backward operating directions, with very high signal-to-noise ratio that can be utilized in monitoring the UV exposure for various applications.

Keywords

sensoropticaloxide

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