A Raman-active crystal, lanthanum tungstate doped with praseodymium (Pr) io
ns, was grown to facilitate the selection of the order of Stokes waves in s
timulated Raman scattering. Absorption of the second Stokes wave by the Pr
ions suppressed conversion to higher-order Stokes waves, resulting in effic
ient energy conversion to the first Stokes wave. (C) 2000 Optical Society o
f America.