Title

Terahertz-range weak reflection fiber optic structures for sensing applications

Document Type

Article

Date of Original Version

3-1-2017

Abstract

This paper describes a series of terahertz-range weak reflection fiber optic structures engineered for distributed temperature and strain sensing applications. Four specific structures are described: an intrinsic Fabry-Perot interferometer, a terahertz-range fiber Bragg grating, a phase-shifted terahertz-range fiber Bragg grating, and a terahertz-range fiber Bragg grating fabricated with an intact optical fiber buffer coating. All four structures were fabricated using a femtosecond laser micromachining system, which inscribed the structures within the core of a single-mode silica optical fiber. Interrogation technique, signal processing, fabrication method, and experimental investigation of each structure are described. The results presented demonstrate that these structures specifically, and terahertz-range optical fiber sensors more generally, hold substantial utility as methods of distributed temperature and strain sensing.

Publication Title

IEEE Journal of Selected Topics in Quantum Electronics

Volume

23

Issue

2

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