Abstract
Comparison between side-hole optical fiber and a new design of elliptical core fiber has been performed regarding the effect of thermal stress on different polarization. The new design comprises an elliptical core with central airhole and side air-holes. Simulation of these structures was carried out on the basis of finite element method. The analysis shows that both the fibers maintain high birefringence with ultra-flattened dispersion and a wide single polarization bandwidth. In addition, the new design exhibits a higher birefringence and effective area compared to a side-hole fiber and also it is affected less by Raman scattering and produces less loss than that of a side-hole fiber. These findings might serve as a ground for justification of the new design and also for its potential applications.
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