Abstract
ABSTRACTWe model a multi‐cavity optical device composed of fiber Bragg gratings. The sensitivity of the device for refractive index measurement is extracted from the change in its free‐spectral range, rendering the sensor robust to small temperature fluctuations. Remote interrogation compatibility is ensured by the all‐fiber design. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:423–428, 2017
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