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First- and second-order Bragg gratings in single-mode planar waveguides of chalcogenide glasses

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5 Author(s)
Saliminia, A. ; Centre d''Opt., Photonique et Laser, Laval Univ., Que., Canada ; Villeneuve, Alain ; Galstyan, T.V. ; LaRochelle, S.
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First- and second order Bragg reflectors at telecommunication wavelength (1.5 μm) were fabricated in single-mode monolayer (As2S3) and multilayer (AsSSe-AsS) chalcogenide glass (ChG) planar waveguides with near bandgap illumination using an interferometric technique. Reflectivities as high as 90% near 1555 nm, and index modulations up to 3×10-4 were achieved. The volume photodarkening effect is the principal mechanism involved in the formation of the Bragg gratings

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Lightwave Technology, Journal of  (Volume:17 ,  Issue: 5 )