Optimum taper length for maximum fluorescence signal from an evanescent wave fiber optic biosensor

Kailiang Sun; Rakesh Kapoor

doi:10.1117/12.771414

7 February 2008 Optimum taper length for maximum fluorescence signal from an evanescent wave fiber optic biosensor

Kailiang Sun, Rakesh Kapoor

Proceedings Volume 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII; 68520U (2008) https://doi.org/10.1117/12.771414
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

A theoretical model using ray tracing method is developed. The results predicted by the model were confirmed by experimental results. The model could explain the experimentally observed fact that the maximum signal for a given realistic tapered length is at a probe radius smaller than that expected from V-number matching condition. It is shown that for obtaining maximum fluorescence signal from an evanescent wave fiber optic biosensor a realistic optimum taper length needs to be chosen. We found that different detection environments require different taper lengths at a given taper angle. These facts were confirmed experimentally.

Citation Download Citation

Kailiang Sun and Rakesh Kapoor "Optimum taper length for maximum fluorescence signal from an evanescent wave fiber optic biosensor", Proc. SPIE 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII, 68520U (7 February 2008); https://doi.org/10.1117/12.771414

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