Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Papiya Dhara

Indian School of Mines, Department of Applied Physics, Dhanbad 826004, India

Politecnico di Torino, Department of Electronics and Telecommunications, 24 Corso Duca degli, Abruzzi, Torino 10129, Italy

Vinod Kumar Singh

Indian School of Mines, Department of Applied Physics, Dhanbad 826004, India

Massimo Olivero, Guido Perrone

Politecnico di Torino, Department of Electronics and Telecommunications, 24 Corso Duca degli, Abruzzi, Torino 10129, Italy

Opt. Eng. 55(4), 046114 (Apr 26, 2016). doi:10.1117/1.OE.55.4.046114
History: Received February 16, 2016; Accepted April 5, 2016
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Abstract.  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 index unit(RIU) is obtained.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Papiya Dhara ; Vinod Kumar Singh ; Massimo Olivero and Guido Perrone
"Reflectance-based low-cost disposable optical fiber surface plasmon resonance probe with enhanced biochemical sensitivity", Opt. Eng. 55(4), 046114 (Apr 26, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.046114


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