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Coupling Characteristics of Multicore Photonic Crystal Fiber-Based 1 ,\times, 4 Power Splitters

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4 Author(s)
Varshney, S.K. ; Div. of Media & Network Technol., Hokkaido Univ., Sapporo, Japan ; Saitoh, K. ; Sinha, R.K. ; Koshiba, M.

A new design of multicore photonic crystal fibers (PCFs) is proposed and investigated through full-vectorial finite-element method and finite-element beam propagation method. The fiber design comprises four identical cores surrounding a central core. The optical power launched into the central core is equally divided into other neighboring four cores with a 25% of coupling ratio. The coupled-mode analysis is also carried out to understand the supermode patterns and the coupling characteristics. Through numerical simulations, it is demonstrated that the optical power can be divided equally in a 5.8-mm-long multicore PCF. The power coupling characteristics obtained through coupled-mode analysis are in very good agreement with those calculated from beam propagation method solver.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 12 )