# Control of the temporal and polarization response of a multimode fiber

## TL;DR

This paper demonstrates comprehensive control over the temporal and polarization properties of light in a multimode fiber, enabling tailored light delivery for advanced imaging and laser applications.

## Contribution

It introduces a method for simultaneous temporal and polarization control of light in multimode fibers, including intensity enhancement and attenuation at specific delays.

## Key findings

- Achieved global light intensity enhancement at chosen delay times
- Demonstrated polarization control of engineered light states
- Enabled multiple delay control for complex light manipulation

## Abstract

Control of the spatial and temporal properties of light propagating in disordered media have been demonstrated over the last decade using spatial light modulators. Most of the previous studies demonstrated spatial focusing to the speckle grain size, and manipulation of the temporal properties of the achieved focus. In this work, we demonstrate temporal control of the total impulse response integrated over all the spatial and polarization modes propagating through a multimode fiber. We notably demonstrate a global enhancement of light intensity at a chosen arrival time, as well as attenuating light intensity at an arbitrary delay. We also demonstrate the full polarization control of such engineered states and a multiple control at different delay times, which opens interesting perspectives for non-linear imaging through complex systems and high power fiber lasers.