Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications

Stephen J. Mihailov; Dan Grobnic; Christopher W. Smelser; Robert B. Walker

doi:10.1117/12.817836

27 April 2009 Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications

Stephen J. Mihailov, Dan Grobnic, Christopher W. Smelser, Robert B. Walker

Author Affiliations +

Proceedings Volume 7316, Fiber Optic Sensors and Applications VI; 73160B (2009) https://doi.org/10.1117/12.817836
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

Silica-based fiber Bragg gratings (FBG) sensors are versatile devices that are typically fabricated using UV laser exposure. As most standard optical fiber polymer coatings are highly absorbing in the UV, grating inscription typically requires the removal and reapplication of the protective coating by either chemical or mechanical means. Optical fiber stripping and recoating are time-consuming processes that can seriously degrade the mechanical integrity of the fiber. For high temperature sensor applications (> 200 °C), the optical fiber is coated in polyimide which is resistant to chemical attack. Invasive and hazardous techniques for its removal are required such as hot sulphuric acid stripping. In this paper, results of FBG inscription directly through the polymer coating of standard optical fiber with a femtosecond infrared laser and a phase mask are reviewed. Significant grating reflectivities are achieved along with improved mechanical reliability and performance at elevated temperatures. The only example of direct FBG inscription through polyimide coatings for high temperature stable grating sensors will also be presented.

Citation Download Citation

Stephen J. Mihailov, Dan Grobnic, Christopher W. Smelser, and Robert B. Walker "Through-the-jacket inscription of fiber Bragg gratings using femtosecond infrared radiation for sensor applications", Proc. SPIE 7316, Fiber Optic Sensors and Applications VI, 73160B (27 April 2009); https://doi.org/10.1117/12.817836

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available