Tapered Fiber Based Infrared DNA Molecule Sensor

Abstract

A single mode tapered fiber is fabricated for the measurement of DNA molecule with monitoring the surrounding refractive index changes. The slimmest dimension of the fiber is roughly $\mathbf{8\ \mu m}$. Refractive index change was given an expression by observing the shifting of transmission spectrum dip with a sensitivity about 1342 nm/RIU. Such a sensor owns the superiorities of easy carrying, anti-electromagnetic interference and short manufacturing cycle, which would have a wide application prospect.