High intensity ArF laser irradiation produces Bragg gratings with index modulations >10-3 in standard germanium-doped silica waveguides without hydrogen loading. A UV-induced birefringence of 2×10-4 is used to compensate for the inherent birefringence of the silica waveguides and makes the grating response identical for TE and TM modes.

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Persistent URL dx.doi.org/10.1049/el:19980338
Journal Electronics Letters
Albert, J, Bilodeau, F., Johnson, D.C., Hill, K.O., Mihailov, S.J., Stryckman, D., … Hibino, Y. (1998). Polarisation-independent strong Bragg gratings in planar lightwave circuits. Electronics Letters. doi:10.1049/el:19980338