Optimization of intensity interrogation method in cascaded double-ring sensors
Optical Engineering（2022）
Abstract
A higher-sensitivity optical sensor based on cascaded double-ring resonators (CDRR) for intensity interrogation has been demonstrated. By detecting the output optical power ratio between the drop port and coupling port and reducing the free spectral range for difference (Delta FSR), the intensity interrogation sensitivity of the CDRR sensor can be improved by 2.15 times. (C) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)
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Key words
cascaded double-ring resonators,intensity interrogation,free spectral range difference,sensitivity
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