Abstract
A fiber-based all-optical switch accomplished by pump depletion in a single-pump phase sensitive (PS) amplifier is theoretically investigated using an inhomogeneous fiber model including the zero-dispersion wavelength (ZDW) fluctuations. We find that the off -state (maximum pump depletion) of the PS all-optical switch is very sensitive to the ZDW fluctuations, whereas the on -state (minimum pump depletion) is more robust. Meanwhile, the nonreciprocal transmission characteristic of the PS all-optical switch induced by the ZDW fluctuations is investigated with the help of the proposed inhomogeneous fiber model. Our theoretical results are useful to optimize the experimental implementation of PS all-optical switch.
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