Related Experiment Video
Updated: Jul 9, 2026

Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Rapid characterization of the ultraviolet induced fiber Bragg grating complex coupling coefficient as a function of
Gordon M H Flockhart1, Geoffrey A Cranch, Clay K Kirkendall
1SFA, Inc., 2200 Defense Highway, Suite 405, Crofton, MD 21114, USA. gordon.flockhart@nrl.navy.mil
Abstract:
We report the application of optical frequency domain reflectometry and a discrete-layer-peeling inverse scattering algorithm to the spatial characterization of the UV induced complex coupling coefficient during fiber Bragg grating growth. The fiber grating is rapidly characterized using this technique to give irradiance dependent growth as a function of exposure time, thereby providing the complete characterization of the coupling coefficient in the form of a "growth surface," which is related to the fiber's photosensitivity. We compare measurements of fiber Bragg grating growth in SMF-28 when exposed to continuous wave 244 nm irradiation from 0 to 90 W cm(-2) for exposure times up to 3230 s with a selection of other fibers including high germanium concentration fiber and erbium doped fiber.
Related Concept Videos
UV–Vis Spectroscopy: Beer–Lambert Law
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
UV–Vis Spectrometers
