Reflectance-based low-cost disposable optical fiber surface plasmon resonance probe with enhanced biochemical sensitivity

被引：16

作者：

Dhara, Papiya ^{[1
,2
]}

Singh, Vinod Kumar ^{[1
]}

Olivero, Massimo ^{[2
]}

Perrone, Guido ^{[2
]}

机构：

[1] Indian Sch Mines, Dept Appl Phys, Dhanbad 826004, Bihar, India

[2] Politecn Torino, Dept Elect & Telecommun, 24 Corso Duca Degli, I-10129 Turin, Italy

来源：

OPTICAL ENGINEERING | 2016年 / 55卷 / 04期

关键词：

sensors; surface plasmon resonance; fiber optic sensors; biochemical sensors; reflectance-based fiber sensor; bifurcated fiber bundle; PHOTONIC CRYSTAL FIBER; REFRACTIVE-INDEX; SENSOR; FABRICATION; SPR;

D O I：

10.1117/1.OE.55.4.046114

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A reflectance-based surface plasmon resonance (SPR) fiber sensor with enhanced sensitivity for biochemical sensing is reported after comparing its result with the transmittance-based SPR optical fiber sensors. The fabricated SPR sensor contains a gold-coated multimode fiber with the implementation of a standard source-sensor-spectrometer interrogation system. As the refractive index of the liquid under test is increased, a redshift of the SPR is observed. The coupling of the source to the fiber sensor is optimized by investigating the effect of an intentional misalignment in transmission-based setup. When a fiber tip coated with the silver mirror and the bifurcated fiber bundle is used, an alignment-free disposable sensor probe is achieved. A comprehensive characterization of the proposed reflectance-based SPR probe is discussed. The maximum sensitivity of 3212.19 nm/refractive indexunit (RIU) is obtained. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：7

共 34 条

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