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Wavelength tuning of femtosecond pulses generated in nonlinear crystals by using diffractive lenses

机译:使用衍射透镜对非线性晶体中产生的飞秒脉冲进行波长调谐

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摘要

We demonstrate that diffractive lenses (DLs) can be used as a simple method to tune the central wavelength of femtosecond pulses generated from second-order nonlinear optical processes in birefringent crystals. The wavelength tunability is achieved by changing the relative distance between the nonlinear crystal and the DL, which acts in a focusing configuration. Besides the many practical applications of the so-generated pulses, the proposed method might be extended to other wavelength ranges by demonstrated similar effects on other nonlinear processes, such as high-order harmonic generation.
机译:我们证明,衍射透镜(DLs)可以用作一种简单的方法,以调节双折射晶体中由二阶非线性光学过程产生的飞秒脉冲的中心波长。波长可调谐性是通过改变非线性晶体和DL之间的相对距离来实现的,后者以聚焦方式起作用。除了如此产生的脉冲的许多实际应用之外,通过证明对其他非线性过程(例如高次谐波生成)的类似影响,可以将所提出的方法扩展到其他波长范围。

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