Spectral Response of Long-Period Fiber Grating Based on Tapered Fiber With Side-Contacted Metal Grating

Abstract

A new long-period fiber grating structure based on a tapered fiber side contacted with a metal grating is proposed and demonstrated in this paper. The temperature/ index tuning sensitivity can be enhanced, and the unusual spectral response of decreasing phase-matching wavelength with respect to increasing grating period and temperature is observed.