Bragg grating inscription in PMMA optical fibers using 400-nm femtosecond pulses

Xuehao Hu, Damien Kinet, Karima Chah, Chi-Fung Jeff Pun, Hwa-Yaw Tam, and Christophe Caucheteur

Index: 10.1364/OL.42.002794

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Abstract

In this Letter, we report the fast growth of high quality uniform Bragg gratings in trans-4-stilbenemethanol (TS)-doped poly(methyl methacrylate) (PMMA) step-index optical fibers. Grating manufacturing was obtained using a 400 nm femtosecond pulsed laser and a 1060-nm-period uniform phase mask. For 20 mW mean laser beam power, the grating reflectivity reaches 98% in ∼60 s.