Ve demonstrate an order-of-magnitude increase in the efficiency for fi
rst-Stokes Raman generation in a gas cell (CH4) by seeding with sponta
neous emission from a dye cell. Second-Stokes and first-anti-Stokes li
nes were also generated more efficiently. The pump energy required for
production of a 1% conversion efficiency for the first-Stokes emissio
n is reduced by a factor of 1.8 below that required without seeding.