Abstract
In order to design couplers based on side-polished photonic crystal fiber (SPPCF), we made the simulation and calculated the optimum residual radius. A model of coupling region of SPPCF coupler was established. By using Rsoft software, optical propagation characteristics of SPPCF coupler was calculated with different residual radius. The simulation showed that light field appeared alternately between two optical fibers of coupler and there was coupling effect. When the residual radius was 2.85 µm or 3.99 µm, coupling effect was more obvious.
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