Transmission-loss characteristics of Al2O3-doped silica fibers

Transmission-loss characteristics of Al
2
O
3
-doped silica fibers have been investigated to develop an Al
2
O
3
alternative dopant for VAD silica-based optical fibers. Optical properties of Al
2
O
3
-doped silica bulk glass and fibers were measured in the
0.11-30-\mu
m spectral region. From the experimental results, the intrinsic loss due to glass material was estimated for Al
2
O
3
-doped silica fibers. The calculated intrinsic loss minima for Al
2
O
3
-doped silica fibers with 0.2- and 1.0- percent relative refractive-index differences were 0.17 dB/km at 1.548 μm and 0.28 dB/km at 1.565 μm, respectively.