A new optical-optical switching technique is proposed and demonstrated with a probe-pump scheme, utilizing nonlinear differential phase shift between two spatial modes in a highly elliptical-core fiber. The probe beam is switched from one intensity-lobe position of the fiber output radiation pattern to the other in a 33-m-long fiber at a pump power of 1.6 W.

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http://dx.doi.org/10.1364/ol.13.000776DOI Listing

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