Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing

doi:10.1016/j.snb.2018.08.027

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	Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing
	Li, K. W.; Zhan, N.; Zhang, N. M. Y.; Zhou, W. C.; Zhang, T.; Che, M.; Wei, L.
	2018
发表期刊	Sensors and Actuators B-Chemical
ISSN	0925-4005
卷号	275 页码:16-24
摘要	We report a simple and effective method to improve the sensitivities of fiber-optic modal interferometers with birefringence induced Vernier effect. Taking optical microfiber coupler as an example, we study the sensitivity enhancement of a microfiber coupler for refractive index (RI) sensing both theoretically and experimentally in the RI range of 1.33-1.35 where bioassays are typically carried out. Numerical results show that by tracing the wavelength shifts of dips in the envelope formed by the Vernier effect, RI sensitivities can be improved by almost one order of magnitude compared to the sensors without the Vernier effect. Then we experimentally achieve an ultra-high sensitivity of 35,823.3 nm/RIU using a microfiber coupler with a width of 3.2 mu m. More importantly, we apply this ultra-sensitive sensor to detect human cardiac troponin, and a limit of detection of 1 ng/mL is achieved. This sensor is simple in configuration andcan serve as a bio-photonic platform for clinical diagnostics environmental monitoring and food safety.
关键词	Optical fiber sensors Optical microfiber couplers Biosensors Vernier effect Human cardiac troponin T refractive-index sensitivity dispersion turning-point long-period gratings biosensor level water DNA Chemistry Electrochemistry Instruments & Instrumentation
DOI	10.1016/j.snb.2018.08.027
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60918
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Li, K. W.,Zhan, N.,Zhang, N. M. Y.,et al. Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing[J]. Sensors and Actuators B-Chemical,2018,275:16-24.
APA	Li, K. W..,Zhan, N..,Zhang, N. M. Y..,Zhou, W. C..,Zhang, T..,...&Wei, L..(2018).Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing.Sensors and Actuators B-Chemical,275,16-24.
MLA	Li, K. W.,et al."Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing".Sensors and Actuators B-Chemical 275(2018):16-24.

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