  We report the first experimental observation of photosensitivity in As2Se3
glass at a wavelength of 1550 nm. We utilize this photosensitivity to induce
the first Bragg gratings using a laser source at a wavelength of 1550 nm. We
quantify the photosensitivity thresholds related to exposition intensity and
exposition time. Finally, we demonstrate that As2Se3 Bragg gratings are widely
tunable in wavelength as the microwire can withstand an applied longitudinal
strain of 4 \times 104 \mu{\epsilon}.
