Numerical simulation of a DFB - fiber laser sensor (part 1)
Journal Title: INCAS BULLETIN - Year 2010, Vol 2, Issue 2
Abstract
This paper presents the preliminary results obtained in developing a numerical simulation analysis of fiber optic bending sensitivity aiming to improve the design of fiber lasers. The developed numerical simulation method relies on an analysis of both the fundamental mode propagation along an optical fiber and of how bending of this fiber influence the optical radiation losses. The cases of simple, undoped and of doped with Er3+ ions optical fibers are considered. The presented results are based on numerical simulation of eigen-modes of a laser intensity distribution by the use of finite element method (FEM) developed in the frame of COMSOL software package. The numerical simulations are performed by considering the cases of both normal, non-deformed optic fiber and of symmetrically deformed optic fiber resembling micro-bending of it. Both types of fiber optic bending losses are analyzed, namely: the transition loss, associated with the abrupt or rapid change in curvature at the beginning and the end of a bend, and pure bend loss is associated with the loss from the bend of constant curvature in between.
Authors and Affiliations
Ion LĂNCRĂNJAN, Sorin MICLOŞ, Dan SAVASTRU
Keywords
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- EP ID EP160536
- DOI 10.13111/2066-8201.2010.2.2.8
- Views 77
- Downloads 0
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