J. Neumann et S. Odoulov, PARAMETRIC AMPLIFICATION OF A COHERENT-LIGHT WAVE IN PHOTOREFRACTIVE BATIO3 BY A SINGLE PUMP BEAM, Optics letters, 22(24), 1997, pp. 1858-1860
We demonstrate a new method of light amplification based on forward fo
ur-wave mixing in photorefractive BaTiO3. A single pump beam of combin
ed (ordinary and extraordinary) polarization can be used for an effici
ent cw amplification of a signal wave with slightly shifted temporal f
requency. initial power of less than 1 nW is amplified similar to 100
times in a 3.2-mm-thick sample. America.