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[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Sensitivity-enhanced Fabry-Perot filled with PDMS temperature sensor based on Vernier effect
摘要： Temperature characteristics of Sensitivity- enhanced Fabry-Perot filled with PDMS temperature sensor based on Vernier effect consisting of two Fabry–Perot interferometers (FPI), one of the FPI’s cavity is internally filled with PDMS, are observed experimentally. Results show that temperature sensitivity of the Sensitivity-enhanced Fabry-Perot sensors is 1.808 nm/℃. It is Vernier effect lead to a double improvement of the temperature sensitivity compar- ed with the sensor with single FPI, of which the cavity is internally populated with PDMS but no Vernier effect. Moreover, the improvement can be enlarged by optimizing the free spectra range of these two FPIs.
关键词： modified temperature sensor,PDMS,Vernier effect,Fabry–Perot interferometer
更新于2025-09-11 14:15:04
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A High-Birefringence Microfiber Sagnac-Interferometer Biosensor Based on the Vernier Effect
摘要： We propose a high-sensitive Sagnac-interferometer biosensor based on the Vernier effect (VE) with a high-birefringence micro?ber. The sensitivity enhancement is achieved by utilizing two cascaded Sagnac interferometers. One of the two interference loops consists of a panda polarization-maintaining ?ber as a ?lter, whilst the other is comprised of high-birefringent micro?ber coated Graphene oxide (GO) as a sensing channel. We theoretically analyzed the sensitivity of the sensor and veri?ed it with experiments. The results of the simulation show that the refractive index sensitivity is more than ?ve times that of the ?ber sensor based on a single Sagnac loop. The sensitivity of the refractive index in the experiments can reach 2429 nm/refractive index unit (RIU), which is basically in accordance with the simulation. We also use electrostatic adsorption to coat GO on the surface of the sensing channel. GO is employed to adsorb bovine serum albumin (BSA) molecules to achieve the desired detection results, which has good biocompatibility and large speci?c surface area. The sensitivity to detect BSA can reach 9.097 nm/(mg×mL?1).
关键词： Vernier effect,micro?ber,Sagnac interferometer,biosensor
更新于2025-09-10 09:29:36
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Vernier effect of cascaded dual microring sensor
摘要： We demonstrate a Vernier microring sensor consisting of a traditional cascaded dual microring resonator and an additional measurement range unit. The sensor’s performance is simulated for different concentrations of aqueous solutions of ethylene glycol (C2H6O2). The theoretical sensitivity of our system is as high as 7386 nm/RIU, an order of magnitude much larger than that of the traditional cascaded dual microring sensor (562 nm/RIU), 13.1 times more than the traditional cascaded dual microring sensor. At the same time, the measurement range can reach as high as 2.49 × 10?2 RIU.
关键词： measurement range,Integrated optics,Vernier effect,microring sensor
更新于2025-09-09 09:28:46