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Synthesis of periodic femtosecond pulse trains in the ultraviolet by phase-locked Raman sideband generation

机译:锁相拉曼边带产生在紫外中合成周期性飞秒脉冲序列

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We demonstrate a new technique for femtosecond-pulse generation that employs ultrafast modulation of a laser field phase by impulsively excited molecular rotational or vibrational motion with subsequent temporal compression. An ultrashort pump pulse at 800 nm performs impulsive excitation of a molecular gas in a hollow waveguide, and a weak delayed probe pulse at 400 nm is scattered on the temporal oscillations of its dielectric index. The resultant sinusoidal phase modulation of the probe pulse permits probe pulse temporal compression by use of both positively and negatively dispersive elements. The potential of this new method is demonstrated by the generation of a periodic train of 5.8-fs pulses at 400 nm with positive group-delay dispersion compensation. (C) 2001 Optical Society of America. [References: 14]
机译:我们演示了一种飞秒脉冲生成的新技术,该技术通过脉冲激发的分子旋转或振动运动以及随后的时间压缩来采用激光场相位的超快调制。在800 nm处的超短泵浦脉冲在中空波导中对分子气体进行脉冲激发,而在400 nm处的弱延迟探测脉冲​​在其介电指数的时间振动上散射。所产生的探测脉冲的正弦相位调制允许通过使用正和负色散元素来暂时探测脉冲。这种新方法的潜力通过在正负群延迟色散补偿下在400 nm处产生5.8 fs脉冲的周期性序列来证明。 (C)2001年美国眼镜学会。 [参考:14]

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