Femtosecond laser damage of broadband pulse compression gratings

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（10）
• 页码范围: 75-78
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.102302

摘要

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 T of 40-100 fs.The LIDT of the gratings is observed a τ0.25 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.