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21 August 2014 Ring resonator coupled Mach-Zehnder interferometer for sensing application
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Proceedings Volume 9233, International Symposium on Photonics and Optoelectronics 2014; 923329 (2014) https://doi.org/10.1117/12.2068433
Event: International Symposium on Photonics and Optoelectronics (SOPO 2014), 2014, Suzhou, China
Abstract
We investigate the light propagation characteristics that depend on strong dispersion response in two-ring resonant structure. Strong dispersion response brings obvious effective phase shift change in resonant arm of Mach-Zehnder interferometer. We propose that two-ring coupled Mach-Zehnder interferometer exhibits sharp asymmetric Fano line shape. It mainly decided by the combined action of a π/2 phase bias in reference arm and effective phase shift in resonant arm. It can greatly enhance the sensitivity of sensor. It allows for measuring effective refractive index change down to 10-9 refractive index units.
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Jing Zhang, Zhongfan Liu, and Yundong Zhang "Ring resonator coupled Mach-Zehnder interferometer for sensing application", Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 923329 (21 August 2014); https://doi.org/10.1117/12.2068433
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