Amorphous films of alpha-SiC:H and alpha-Si:H were deposited upon the
flat surfaces of D-shaped fibers. Interaction of light with the semico
nductor films occurred through evanescent coupling. Pulse shaping on a
picosecond time scale was observed in 3.5-cm-long fibers with optical
powers of <10 W, enhancing the effective nonlinearity by a factor of
10(3). (C) 1997 Optical Society of America