Title :
Integrated Optical Chemical Sensor Based on an SOI Ring Resonator Using Phase-Interrogation
Author :
Jin Liu ; Xi Zhou ; Zhi Qiao ; Jianhao Zhang ; Chenzhao Zhang ; Tuowen Xiang ; Lingling Shui ; Yaocheng Shi ; Liu Liu
Author_Institution :
Centre for Opt. & Electromagn. Res., South China Normal Univ., Guangzhou, China
Abstract :
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 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.
Keywords :
chemical sensors; integrated optics; optical sensors; phase measurement; refractive index measurement; resonators; silicon-on-insulator; SOI ring resonator; Si; bulk refractive index sensing; coherent detection technology; detection limit; integrated optical chemical sensor; intensity noise; phase measurement; phase-interrogation approach; rapid phase variation; silicon-on-insulator ring resonator; single-sideband generation; Measurement by laser beam; Optical ring resonators; Optical sensors; Optical waveguides; Ring lasers; Wavelength measurement; Silicon-on-insulator; optical sensor; phase interrogation; ring resonator;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2014.2352973
