, Volume 3, Issue 1, pp 67-73,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 15 Aug 2012

Modeling refractive index change in writing long-period fiber gratings using mid-infrared laser radiation


The research on the use of fiber sensors based on long-period fiber gratings inscribed by CO2 laser mid-infrared radiation has increased in the last years. In this paper, a set of analytical expressions are used to model the interaction between laser radiation and an optical fiber and to determine the resulting refractive index change. Thermal and residual stress analysis is exemplified for a standard single mode fiber, demonstrating the capability of these models to point out the necessary parameters to achieve proper optical fiber devices based on long period fiber gratings. Experimental results are also presented.

This article is published with open access at Springerlink.com