Analytical evaluation of bending loss oscillations in photonic crystal fibers |
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Authors: | Jacek Olszewski Marcin Szpulak Tomasz Nasi?owski |
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Institution: | a Institute of Physics, Wroclaw University of Technology, Wybrze?e Wyspiańskiego 27, 50-370 Wroclaw, Poland b SCK CEN, Boeretang 200, 2400 Mol, Belgium c Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium |
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Abstract: | In this paper we present an analytical formula for bending loss oscillations in photonic crystal fibers (PCFs). We follow the approach originally adopted for conventional double-clad fibers and show that it can be applied to PCFs by substituting the structural parameters of the conventional fiber by their PCF counterparts. We then examine the spectral dependence of the critical bending radius and the position of the first order loss peak as a function of structural parameters of the PCF cladding such as the fill factor and the number of hole rings. Finally, we evaluate the precision of the analytical model by comparing the results to finite element calculations for a selection of PCF geometries. |
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Keywords: | Photonic crystal fiber Bending losses |
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