Amplitude gratings generation by selective defect bleaching in KCl:CO3K2 crystals

1) MARTÍNEZ-MATOS, Ó.; TORCHIA, G.A.,; LENCINA, A.; TOCHO, J. O.

APPLIED PHYSICS B - LASERS AND OPTICS

Springer Verlag

Lugar: Alemania; Año: 2008 vol. 91 p. 363 - 367

0946-2171

AB. Volume grating formation by spatially-selective defect bleaching is demonstrated in coloured KCI:CO3K2 crystals. The sample is coloured by a train of pulses with a wavelength of lambda = 266 nm and bleached with a cw Ar-laser with a wavelength of lambda= 514.5 nm. Diffraction efficiency for a 1.6 mum grating period is studied both experimentally and theoretically, using the evolution of colour centre concentration. Hologram recording parameters are obtained and the evolution of the spatial grating profile is discussed. Diffraction efficiencies three times higher than previously published efficiencies are obtained. (23 References).