Microsoft Technology Licensing, LLC

Teodora Ilieva

Richard John Black

Austin N Donnelly

Timothy John Deegan

Ioan Alexandru Stefanovici

James Hilton Clegg

Rokas Drevinskas

Daniel Jonathan Finchley Cletheroe

Masaaki Sakakura

Thomas Torsten Dr Winkler

Erika Blancada Aranas

Pablo Rafael Andreas Wilke Berenguer

Bridgette Rosanna Doris Cooper

Patrick Neil Anderson

Ariel Gomez Diaz

Hugh David Paul Williams

Philip Athelstan Wainman

Charles Ernest Whittaker

A method for forming birefringent voxels comprises simultaneously generating a first seed pulse and a first data pulse. The first seed pulse and the first data pulse are spatially-separated laser pulses having different amplitudes. The first seed pulse is focused at a first seed location, and the data pulse is focused at a first data location. The first seed location and the first data location are separated by a predetermined distance along a scan path, with the first seed location being ahead of the first data location. Subsequently, a second seed pulse and a second data pulse are generated, and focused at a second seed location and second data location, respectively. The second seed and data locations are separated by the predetermined distance. The second data location is the same as the first seed location, resulting in formation of a birefringent voxel.

Method and system for forming birefringent voxels

A method of writing data to a transparent substrate comprises forming a first voxel by focusing a first laser pulse on a first location in a transparent substrate; and forming a second voxel by focusing a second laser pulse on a second location in the transparent substrate. The first laser pulse and the second laser pulse have different amplitudes, resulting in the first and second voxels having different strengths. Also provided are a system useful for implementing the method; an optical data storage medium obtainable by the method; and a method of reading data from the optical data storage medium.

Phase-modulated optical data storage

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Cambridge, United Kingdom

Teodora Ilieva