The University of Sydney

Danny Wong

Graham Town

Wei Xu

Paul Blazkiewicz

Mark Geoffrey Sceats

John Canning

Simon Charles Fleming

Takumi Fujiwara

Yuxing Zhao

Thomas Ryan

Simon Poole

An optical waveguide () includes a region () which, after electrical poling of a guiding region (), maintains an internal electric field induced by the poling potential. The internal electric field may arise from charge separation between regions () induced by an adjacent poling electrode (A), and region () acts to inhibit decay of the space charge and to increase the lifetime of the induced electro-optic effect. The waveguide may comprise a twin hole optical fiber () with internal electrodes (A,A), where the region () comprises a borosilicate layer concentrically disposed about one of the electrodes.

Poled waveguide structure with stabilized internal electric field

A method of thermally poling a silica based waveguide ( ) comprises exposing a region of the waveguide ( ) to an electric field (for example, via capillary electrodes ( ) inserted into holes in the waveguide); directing a laser beam ( ) into the region exposed to the electric field to effect localized heating of the region via direct absorption; and scanning the laser beam ( ) over the region at a rate selected to avoid heating of the region above the glass transition temperature. Reversing the electric field while scanning the laser beam ( ) allows the formation of periodic poled gratings. The waveguide ( ) can comprise an optical fiber.

Laser assisted thermal poling of silica based waveguides

Inducing or enhancing electro-optic properties in optically transmissive

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Danny Wong