Tunable sub-10-fs ultraviolet pulses generated by achromatic frequency doubling
Tunable sub-10-fs ultraviolet pulses generated by achromatic frequency doubling
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DOI：
10.1364/ol.29.001686
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发表时间：
2004-07-15
期刊：
影响因子：
3.6
通讯作者：
Riedle, E
中科院分区：
文献类型：
--
作者：
Baum, P;Lochbrunner, S;Riedle, E
短于 10 fs 的可调谐 UV 脉冲是通过非共线光学参量放大器的消色差倍频产生的。通过合适的双棱镜序列，我们实现了一阶和二阶消色差相位匹配，并将非线性晶体的自然带宽增加了 80 倍。在 360 微米厚的β-钡中产生傅里叶极限为 2.9 fs 的极宽紫外光谱。贝拉特晶体的转换效率为20%。我们使用第二个棱镜序列补偿高度稳定的紫外脉冲的角色散和一阶啁啾，并使用用于直接电场重建的零附加相位光谱相位干涉测量法（ZAP-SPIDER）全面表征时间脉冲形状。通过使用可变形镜控制高阶线性调频脉冲，可以生成短至 7 fs 的脉冲。 (C) 2004 年美国光学学会。
Tunable UV pulses shorter than 10 fs are generated by achromatic frequency doubling of a noncollinear optical parametric amplifier. With a suitable two-prism sequence we achieve first- and second-order achromatic phase matching and increase the natural bandwidth of the nonlinear crystal by a factor of 80. Extremely broad UV spectra with a Fourier limit of 2.9 fs are generated in a 360-mum-thick beta-barium. berate crystal at a conversion efficiency of 20%. We compensate for the angular dispersion and the first-order chirp of the highly stable UV pulses with a second prism sequence and fully characterize the temporal pulse shape with zero-additional-phase spectral phase interferometry for direct electric-field reconstruction (ZAP-SPIDER). Pulses as short as 7 fs are generated by controlling the higher-order chirp with a deformable mirror. (C) 2004 Optical Society of America.