TY - JOUR KW - pfc AU - V. Damiao AU - Dana Anderson BT - Journal of Optics A: Pure and Applied Optics DA - 11/2003 DO - 10.1088/1464-4258/5/6/023 PY - 2003 SP - S536 EP - S549 T2 - Journal of Optics A: Pure and Applied Optics TI - The geometry underlying photorefractive two-beam coupling VL - 5 SN - 1464-4258 ER -