Integrated Optical Chemical Sensor Based on an SOI Ring Resonator Using Phase-Interrogation

Integrated Optical Chemical Sensor Based on an SOI Ring Resonator Using Phase-Interrogation

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chocolate chip cookie purse A phase-interrogation approach for the bulk refractive index sensing based on a silicon-on-insulator (SOI) ring resonator is introduced.The rapid phase variation around the resonance of the ring resonator is interrogated, and a single-sideband generation and coherent detection technology is adopted for the phase measurement.In the proposed approach, most of the intensity 3m speedglas 9002nc noise can be shielded, which leads to an ultra-stable reading for the phase signals.A sensitivity of 6 × 103 rad/RIU and a detection limit of 2.

5 × 10-6 RIU are demonstrated.