In-fiber polymer–glass hybrid waveguide Bragg grating

Abstract

A 1.2 m ͑height͒ ϫ 125 m ͑depth͒ ϫ 500 m ͑length͒ microslot along a fiber Bragg grating was engraved across the optical fiber by femtosecond laser patterning and chemical etching. By filling epoxy in the slot and subsequent UV curing, a hybrid waveguide grating structure with a polymer core and glass cladding was fabricated. The obtained device is highly thermally responsive with linear coefficient of 211 pm/°C.

Novel fiber Bragg grating sensor implemented in a polymer-core/silica-cladding hybrid optical fiber

“…However, the cladding-removed fiber is very delicate which limits its application for sensing. K Zhou implemented a hybrid optical waveguide using a polymer of negative TOC in a micro-channel which is nevertheless delicate too [7]. Here we describe implementation of a hybrid optical fiber composed of a silica-cladding and polymer-core and inscription of a FBG with a phase mask.…”