Stimulated Raman scattering is investigated in a 100-m long single mode fib
er with bend-induced loss which has a steep wavelength dependence. The wave
length dependent loss can be used to suppress the second Stokes conversion
resulting in an increased first Stokes intensity. Our experiments with a Q-
switch Nd:YAG laser produced a rectangular first Stokes pulse at the fiber
output. (C) 1999 Published by Elsevier Science B.V. All rights reserved.