Abstract

This review paper presents recent developments on the fabrication of novel thermally stable Type II fiber Bragg grating structures using femtosecond lasers and the phase mask technique. By manipulating the inscription beam and phase mask designs, exotic grating structures, such as ultrashort gratings <100 μm in length, Fabry-Perot structures or π-phase shifted structures can be created that are stable at high temperatures. These novel structures can also be created directly through protective polymer coatings such as polyimide, thus simplifying their manufacture.

© 2018 Crown

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

Cyril Hnatovsky, Dan Grobnic, and Stephen J. Mihailov
Opt. Express 26(18) 23550-23564 (2018)

Spectral degradation of Type II π-phase-shifted fiber Bragg gratings due to femtosecond laser induced loss

Dan Grobnic, Cyril Hnatovsky, and Stephen J. Mihailov
Opt. Express 27(2) 1507-1519 (2019)

Bragg grating inscription in various optical fibers with femtosecond infrared lasers and a phase mask

Stephen J. Mihailov, Dan Grobnic, Christopher W. Smelser, Ping Lu, Robert B. Walker, and Huimin Ding
Opt. Mater. Express 1(4) 754-765 (2011)

Through-the-coating femtosecond laser inscription of very short fiber Bragg gratings for acoustic and high temperature sensing applications

Cyril Hnatovsky, Dan Grobnic, and Stephen J. Mihailov
Opt. Express 25(21) 25435-25446 (2017)

Type I and II Bragg gratings made with infrared femtosecond radiation in high and low alumina content aluminosilicate optical fibers

Dan Grobnic, Stephen J. Mihailov, John Ballato, and Peter D. Dragic
Optica 2(4) 313-322 (2015)