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Sensors 2013, 13(6), 7443-7453; doi:10.3390/s130607443

Theoretical Analysis of the Optical Propagation Characteristics in a Fiber-Optic Surface Plasmon Resonance Sensor

1,* , 2
1,*  and 1
1 Key Laboratory of Biorheological Science and Technology, Chongqing University, Ministry of Education, and Key Laboratory of Vision Loss, Regeneration and Restoration, Chongqing, Bioengineering College, Chongqing University, Chongqing 400030, China 2 College of Pharmacy, Third Military Medical University, Chongqing 400038, China
* Authors to whom correspondence should be addressed.
Received: 20 April 2013 / Revised: 3 June 2013 / Accepted: 5 June 2013 / Published: 7 June 2013
(This article belongs to the Section Physical Sensors)
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Surface plasmon resonance (SPR) sensor is widely used for its high precision and real-time analysis. Fiber-optic SPR sensor is easy for miniaturization, so it is commonly used in the development of portable detection equipment. It can also be used for remote, real-time, and online detection. In this study, a wavelength modulation fiber-optic SPR sensor is designed, and theoretical analysis of optical propagation in the optical fiber is also done. Compared with existing methods, both the transmission of a skew ray and the influence of the chromatic dispersion are discussed. The resonance wavelength is calculated at two different cases, in which the chromatic dispersion in the fiber core is considered. According to the simulation results, a novel multi-channel fiber-optic SPR sensor is likewise designed to avoid defaults aroused by the complicated computation of the skew ray as well as the chromatic dispersion. Avoiding the impact of skew ray can do much to improve the precision of this kind of sensor.
Keywords: SPR; fiber-optic; multi-channel; sensor SPR; fiber-optic; multi-channel; sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Liu, L.; Yang, J.; Yang, Z.; Wan, X.; Hu, N.; Zheng, X. Theoretical Analysis of the Optical Propagation Characteristics in a Fiber-Optic Surface Plasmon Resonance Sensor. Sensors 2013, 13, 7443-7453.

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