Modeling of Holey Fiber Tapers With Selective Transmission for Sensor Applications

The theoretical modeling of large-mode-area silica holey fiber tapers with collapsed air holes that are fabricated with a nonadiabatic process is reported. The transmission spectra of such tapers exhibit multiple interference peaks due to the beating between two modes of the taper waist. The devices investigated here can be useful for a variety of sensor applications since the interference peaks are sensitive to the external environment. Our theoretical model confirms the experimental results