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Bragg gratings made in reverse proton exchange lithium niobate waveguides with a femtosecond IR laser and a phase mask

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6 Author(s)
Grobnic, D. ; Commun. Res. Centre Canada, Ottawa, Ont., Canada ; Mihailov, S.J. ; Smelser, C.W. ; Genereux, Francis
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Three-decibel reflecting Bragg gratings were made in buried reverse proton exchange lithium niobate waveguides with high-power femtosecond infrared radiation from a regenerative Ti : sapphire amplifier and a phase mask. Two superposed gratings were observed: a relief grating on the surface of the crystal with a 300-nm corrugation depth and a subsurface grating in phase with the surface grating. Atomic force and optical microscopy were used to characterize the grating's physical structure.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 7 )