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16 November 2010 Theoretical analysis of light transmission in a perfectly circular double clad fiber using coupled mode method
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Abstract
Light propagation in a perfect circular double clad fiber (DCF) is numerically investigated by using the coupled mode method with translating the DCF into a single mode fiber (SMF) and an annular core fiber (ACF). The results show that for the coupling coefficients between the LP01 mode of the SMF and the guided modes (LP0n modes) of the ACF, the high-order mode has a larger coupling coefficient than the low-order mode for the ACF. By using the coupled mode equations the field distribution in the DCF core is calculated, the results show that the power shows a quasi-periodic distribution along the DCF core and its average period increases with increasing wavelength for different DCF parameters. The simulation results agree with the light ray propagation in the DCF.
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Zhongnan Xu, Zejin Liu, Kailiang Duan, and Wei Zhao "Theoretical analysis of light transmission in a perfectly circular double clad fiber using coupled mode method", Proc. SPIE 7843, High-Power Lasers and Applications V, 784313 (16 November 2010); https://doi.org/10.1117/12.865515
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