Self-induced polarization tracking, tunneling effect and modal attraction in optical fiber

TL;DR

This paper demonstrates how light can self-organize its polarization in optical fibers using the Omnipolarizer, enabling all-optical data processing, polarization tunneling, and potential applications in multimode fibers for spatial multiplexing.

Contribution

It introduces the Omnipolarizer device for self-induced polarization control and explores its applications in high-speed data processing and mode multiplexing.

Findings

Successful spontaneous repolarization of 40-Gbit/s signals

Observation of polarization tunneling effect

Potential extension to multimode fiber applications

Abstract

In this paper, we report the observation and exploitation of the capability of light to self-organize its state-of-polarization, upon propagation in optical fibers, by means of a device called Omnipolarizer. The principle of operation of this system consists in a counter-propagating four-wave mixing interaction between an incident signal and its backward replica generated at the fiber output thanks to a reflective fiber loop. We have exploited this self-induced polarization tracking phenomenon for all-optical data processing and successfully demonstrated the spontaneous repolarization of a 40-Gbit/s On-Off keying optical signal without noticeable impairments. Moreover, the strong local coupling between the two counter-propagating waves has also revealed a fascinating aspect of the Omnipolarizer called polarization-based tunneling effect. This intrinsic property enables us to instantaneously let jump a polarization information onto the reflected signal, long before the expected time-of-flight induced by the round-trip along the fiber span. Finally, we discuss how the concept of self-organization could be generalized to multimode fibers, which paves the way to new important applications in the framework of spatial-mode-multiplexing.