Sensors 2013, 13(8), 10333-10347; doi:10.3390/s130810333
Article

3D Finite Element Model for Writing Long-Period Fiber Gratings by CO2 Laser Radiation

1,2,* email, 1email, 1email and 1email
Received: 1 July 2013; in revised form: 6 August 2013 / Accepted: 8 August 2013 / Published: 12 August 2013
(This article belongs to the Special Issue Optomechatronics)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: In the last years, mid-infrared radiation emitted by CO2 lasers has become increasing popular as a tool in the development of long-period fiber gratings. However, although the development and characterization of the resulting sensing devices have progressed quickly, further research is still necessary to consolidate functional models, especially regarding the interaction between laser radiation and the fiber’s material. In this paper, a 3D finite element model is presented to simulate the interaction between laser radiation and an optical fiber and to determine the resulting refractive index change. Dependence with temperature of the main parameters of the optical fiber materials (with special focus on the absorption of incident laser radiation) is considered, as well as convection and radiation losses. Thermal and residual stress analyses are made for a standard single mode fiber, and experimental results are presented.
Keywords: laser processing; long-period fiber gratings; finite element modeling; fiber-based sensors; refractive-index modulation; thermo-mechanical processes
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MDPI and ACS Style

Coelho, J.M.P.; Nespereira, M.; Abreu, M.; Rebordão, J. 3D Finite Element Model for Writing Long-Period Fiber Gratings by CO2 Laser Radiation. Sensors 2013, 13, 10333-10347.

AMA Style

Coelho JMP, Nespereira M, Abreu M, Rebordão J. 3D Finite Element Model for Writing Long-Period Fiber Gratings by CO2 Laser Radiation. Sensors. 2013; 13(8):10333-10347.

Chicago/Turabian Style

Coelho, João M.P.; Nespereira, Marta; Abreu, Manuel; Rebordão, José. 2013. "3D Finite Element Model for Writing Long-Period Fiber Gratings by CO2 Laser Radiation." Sensors 13, no. 8: 10333-10347.

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