Abstract
In order to design couplers based on side-polished photonic crystal fiber (SPPCF), we made the simulation and calculated the polished angle. A model of coupling region of SPPCF coupler was established. The optical propagation characteristics of SPPCF coupler was calculated with different angles by using the software Rsoft. The simulation shows that light field appeared alternately between two optical fibers of coupler and there was coupling effect. When the angle was 0°, it could provide the best design for the objective coupling ratio of 50%, because the relatively longer coupling period gives more convenience to fabricate a PCF based fiber coupler.
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