DEMOSTRAMOS QUE EN UN POLÍMERO FOTORREFRACTIVO EN EL CUAL SE INTERSECTAN UN HAZ FUERTE Y UNO DÉBIL SE OBTIENEN ALTAS GANANCIAS CUANDO EL ÁNGULO ENTRE LOS HACES ES PEQUEÑO. LA AMPLIFICACIÓN DEL HAZ DÉBIL ES ACOMPAÑADA POR LA FORMACIÓN DE UN TERCER HAZ, EL CUAL ES PRODUCIDO POR LA DIFRACCIÓN DEL HAZ FUERTE EN EL ORDEN ”1 DE DIFRACCIÓN. LA GANANCIA OBTENIDA POR EL MECANISMO DE MEZCLA DE TRES ONDAS ES MUCHO MÁS ALTA QUE LA PRODUCIDA POR MECANISMOS REPORTADOS ANTERIORMENTE. LOS RESULTADOS EXPERIMENTALES CONCUERDAN CON LOS RESULTADOS TEÓRICOS OBTENIDOS INICIALMENTE PARA CRISTALES FOTORREFRACTIVOS.AbstractWE DEMONSTRATE THAT IN PHOTOREFRACTIVE POLYMER BY CROSSING A STRONG AND A WEAK BEAMS ONE CAN ACHIEVE HIGH INTENSITY GAINS WHEN THE ANGLE BETWEEN THEM IS SMALL. THE AMPLIFICATION OF THE WEAK WAVE IS ACCOMPANIED BY THE FORMATION OF THE THIRD BEAM PRODUCED BY THE STRONG BEAM DIFFRACTION INTO THE ”1 ORDER. THE GAIN OBTAINED BY THE MECHANISM OF THREE-WAVE MIXING ARE MUCH HIGHER THAN THE GAINS PRODUCED BY EARLIER REPORTED MECHANISMS. THE EXPERIMENTAL RESULTS ARE AGREE WITH THE THEORETICAL RESULTS OBTAINED WITH THE EARLIER FOR PHOTOREFRACTIVE CRYSTALS.WE DEMONSTRATE THAT IN PHOTOREFRACTIVE POLYMER BY CROSSING A STRONG AND A WEAK BEAMS ONE CAN ACHIEVE HIGH INTENSITY GAINS WHEN THE ANGLE BETWEEN THEM IS SMALL. THE AMPLIFICATION OF THE WEAK WAVE IS ACCOMPANIED BY THE FORMATION OF THE THIRD BEAM PRODUCED BY THE STRONG BEAM DIFFRACTION INTO THE ""1 ORDER. THE GAIN OBTAINED BY THE MECHANISM OF THREE-WAVE MIXING ARE MUCH HIGHER THAN THE GAINS PRODUCED BY EARLIER REPORTED MECHANISMS. THE EXPERIMENTAL RESULTS ARE AGREE WITH THE THEORETICAL RESULTS OBTAINED WITH THE EARLIER FOR PHOTOREFRACTIVE CRYSTALS.