Comparison Between Picosecond and cw Photorefractive Effect in BaTiO3

Abstract

The magnitude, erasure fluence, and dark erasure time constants for photorefractive index gratings written with single 30 ps pulses of between 1 and 15 mJ cm-2 at 0.532 μm have been reported previously1,2. Here we report, for comparison, cw measurements at 0.515 μm of these characteristics in the same crystal sample.