Effective index drift from molecular hydrogen diffusion in hydrogen-loaded optical fibres and its effect on Bragg grating fabrication | Zendy

B. Malo | Zendy; Jacques Albert | Zendy; K.O. Hill | Zendy; F. Bilodeau | Zendy; D.C. Johnson | Zendy

Open Access

Effective index drift from molecular hydrogen diffusion in hydrogen-loaded optical fibres and its effect on Bragg grating fabrication

Author(s) -

B. Malo,

Jacques Albert,

K.O. Hill,

F. Bilodeau,

D.C. Johnson

Publication year - 1994

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el:19940274

Subject(s) - photosensitivity , materials science , fiber bragg grating , hydrogen , diffusion , fabrication , wavelength , grating , optics , optical fiber , photochromism , refractive index , optoelectronics , chemistry , nanotechnology , medicine , physics , alternative medicine , organic chemistry , pathology , thermodynamics

When hydrogen loading is used to enhance the photosensitivity of silica-based optical waveguides and fibres, the presence of molecular hydrogen dissolved in the glass matrix changes the effective index of propagation of guided optical modes by as much as 0.05%. Real-time monitoring of the reflectivity spectrum of Bragg gratings written in such conditions shows that the centre wavelength follows the changes in hydrogen concentration due to diffusion and reaction with glass defects

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