Effect of a depth attenuated refractive index profile in the angular responses of the efficiency of higher orders in volume gratings recorded in a PVA/acrylamide photopolymer

1. Neipp, C.
2. Sheridan, J.T.
3. Gallego, S.
4. Ortuño, M.
5. Márquez, A.
6. Pascual, I.
7. Beléndez, A.