Design and analysis of depolarized four-wave mixing in dhalcogenide photonic crystal fibers

Four-wave-mixing (FWM) is a widely used technique for sensing, communication and medical applications. However, polarization dependency of the conversion efficiency (CE) of FWM introduces complexity to the design and limits its usage. One method to overcome this problem is to utilize depolarized pump light. Although polarization-independent FWM with depolarized pump was demonstrated before [1] , the effect of different depolarization schemes is not analyzed so far. In this work, we study the CE of various depolarized schemes with a continuous-wave degenerate FWM in a tapered GeAsSe chalcogenide (ChG) photonic crystal fiber (PCF). Such fibers are promising for achieving parametric gain with low pump powers [2] . We also provide a comparison between polarized and depolarized FWM CE.