Abstract

The fabricated gratings used for an 800-nm compressed laser pulse have more than 90% diffraction efficiency in the -1st order for TE polarization within 760-860 nm, and the maximum value is 94.3%. The laserinduced damage threshold (LIDT) of the gratings increases from 0.53 to 0.75 J/cm2 in the normal beam in a pulse width \tau of 40-100 fs. The LIDT of the gratings is observed a \tau^{0.25} scaling in the pulse width region. The damage morphologies of the gratings indicate that the initial damage of the gratings locates at the grating lines, a position that coincides with that of the electric field maximum.

© 2013 Chinese Optics Letters

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