Oxford University Innovation Limited

Julian Fells

Patrick Salter

Martin James Booth

Steve J Elston

Stephen M Morris

Martin Booth

Patrick S Salter

Raphael Turcotte

Martin J Booth

Method of laser modifying an optical fibre to form a modified region at a target location within the fibre, comprising positioning at least a portion of an optical fibre in a laser system for modification by a laser, applying a correction to an active optical element of the laser system to modify wavefront properties of the laser to counteract an effect of aberration on laser focus, and laser modifying the optical fibre at the target location using the laser with the corrected wavefront properties to produce the modified region.

Method of laser modification of an optical fibre

A device for modulation of light () having a wavelength, comprising: a first substrate () with a first face () and a second opposite face (), and comprising a first electrode (); a second substrate () adjacent to the second face () and defining a gap between the first and second substrate (), the second substrate () comprising a second electrode (); a responsive liquid crystal layer () disposed in the gap, wherein the responsive liquid crystal layer () has a flexoelectro-optic chiral nematic phase, and is birefringent with an optic axis that tilts in response to an applied electric field between the first and second electrode (); and a mirror adjacent to the second substrate (), the mirror configured to reflect incident circular polarised light while preserving its handedness.

Liquid crystal modulator

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Julian Fells