Aston Photonic Technologies Limited

Yu Liu

Ian Bennion

Lin Zhang

Xuewen Shu

John A R Williams

Bashir Aliyu Labbo Gwandu

Filip Floreani

Donghui Zhao

A regenerated optical waveguide is fabricated by hydrogenating an optical waveguide () and exposing a grating section () to a UV laser beam interference fringe pattern () to form a Type I grating. The grating section () is exposed for a second period to erase the Type I grating, and then a third period to cause a regenerated optical waveguide grating to form. The resonant wavelength increases during the third period from being substantially the same as the final wavelength of the Type I grating.

Methods of fabricating a regenerated optical waveguide grating

In the present invention an optical waveguide grating sensing device for a dual-parameter optical waveguide grating sensor includes a first optical waveguide grating of a first resonant wavelength provided in a first section of an optical waveguide and a second optical waveguide grating of a second resonant wavelength provided in a second of an optical waveguide. The first and second gratings have different coefficients of rate of change of wavelength as a function of temperature and have substantially the same coefficient of rate of change of wavelength as a function of stain.

Dual-parameter optical waveguide grating sensing device and sensor

Growing community of inventors

Birmingham, United Kingdom

Yu Liu