Length Effects of Hetero-Core Optical Biosensor based on Evanescent Field Absorption

Title & Authors
Length Effects of Hetero-Core Optical Biosensor based on Evanescent Field Absorption
Shim, Joon-Hwon; Chan, Joo-Kwong; Sohn, Kyung-Rak;

Abstract
Sensing performances of evanescent field absorption (EFA) hetero-core fiber sensor has been presented based on EFA by changing the length and the core diameter of the single mode fiber. Experimental results have demonstrated a good feature in their relationship between the length and the core diameter of the single mode fiber. The sensor consists of 2 fiber optics which have the same cladding diameter of $\small{125{\mu}m}$ However one fiber optic used is single mode and has varying core diameter ranging from 3.3 to $\small{5.6{\mu}m}$. The other fiber is multimode type and has a thicker fixed core diameter of $\small{62.5{\mu}m}$. The 2 fiber optics are thermally spliced together. Experiments conducted to measure the resonance wavelength were carried out over a range of refractive index, to find the optimum sensing length Experiments show that core diameter of the single mode fiber and sensing length offects the linearity and sensitivity.
Keywords
evanescent field absorption;hetero-core structure;resonance wavelength;biosensor;optical fiber sensor;
Language
English
Cited by
References
1.
Athanasios, N. C., Lee, S. M., Lee, S. B., Simarjeet, S. S., and Mario, D.,(2005) "High Sensitivity Evanescent Field Fiber Bragg Grating Sensor" IEEE Photonics Technology Letters, Vol. 17, No. 6, pp. 1253-1255

2.
Angela, L. P., Mohana, S., Raj, M.,(2007) "A review of fiber-optic biosensors." Sensors and Actuators B: Chemical, Volume 125, Issue 2, 8, pp. 688-703

3.
Choudhury, P. K., Yoshino, T.(2004) "On the fiber-optic chlorine sensor with enhanced sensitivity based on the study of evanescent field absorption spectroscopy" Optik 115, No 7, 329-333

4.
David, M., Shankar, P. M., Raj, M.(2006) "Measuring bacterial growth by tapered fiber and changes in evanescent field" Biosensors and Bioelectronics 21, pp. 1339-1344

5.
Daniel, V. L.(2003) "Detection of Microorganisms and Toxins with Evanescent Wave Fiber-Optic Biosensors" Proceedings of the IEEE, Vol. 91, No. 6, pp. 902-907

6.
Fouad, E. D., Abdelaziz, A.(2008) "Evanescent-wave in perturbed optical fibers" Optics Communications 281, 4329-4333

7.
George, P. A., Joel, P. G., Lynn, K. C., Daya, W., Lisa, C., Shriver, L., Frances, S. L.(1994) "Development of an Evanescent Wave Fiber Optic Biosensor" Engineering in Medicine and Biology Magazine, IEEE Vol. 13, No. 3, pp. 358-363

8.
Gibson, B. C., Dower, P. M.(2007) "Refractive index design and validation for evanescent field power maximization in optical fibre sensors" Optics Communications 279, 303-312

9.
Senior, J. M.(1992) "Optical Fiber Communications Principles and Practice Second edition" Prentice Hall International Series In Optoelectronics

10.
Mitsuhiro, I., Atsushi, S., Kazuhiro, W.(2004) "Heterocore structured fiber optic surface plasmon resonance sensor with silver film.", Sensors and Actuators B: Chemical, Volume 101, Issue 3, 15, pp. 368-372