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首页> 外文学位 >Carrier-envelope phase stabilization of grating-based chirped-pulse amplifiers.
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Carrier-envelope phase stabilization of grating-based chirped-pulse amplifiers.

机译：基于光栅的chi脉冲放大器的载波包络相位稳定。

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摘要

In this research, the carrier-envelope phase (CE phase) evolution of the pulse train from a Kerr-lens mode-locked chirped-mirror dispersion compensated Ti:Sapphire laser oscillator was stabilized. The offset frequency corresponding to the rate of change of the CE phase was obtained by spectrally broadening the oscillator pulses in a photonic crystal fiber and interfering the f and 2f components. An offset frequency linewidth of 100 mHz was obtained and could be locked over several hours. The effect of path length drift in the interferometer used for CE phase stabilization of the laser oscillator was investigated. By stabilizing the path length drift, the interferometer noise was reduced by several orders of magnitude.;The CE phase drift through a grating-based chirped-pulse multi-pass amplifier was investigated. Varying the grating separation by 1microm in the stretcher was found to cause a shift of 3.7 +/-1.2 rad of the CE phase. The CE phase could be stabilized to within 160 mrad rms error by feedback controlling the grating separation. By locking the path length in the f-to-2f interferometer used to stabilize the CE phase of the oscillator pulses, the fast (>3 Hz) CE phase drift of the amplified laser pulses was reduced from 79 to 48 mrad.;It was also found that the CE phase could be shifted and set to any value within a 2pi range by changing the grating separation. Also, the CE phase could be continuously modulated within a 2pi range while maintaining a relative phase error of 171 mrad. The CE phase shift of a grating-based compressor was found to be stabilized to 230 mrad rms.;The effect of laser power fluctuation on the CE phase measurement was also investigated. It was found that a 1% fluctuation of the laser energy caused a 160 mrad error in the CE phase measurement. A two-step model is proposed to explain the phase-energy coupling in the CE phase measurement. The model explains the experimentally observed dependence of the group delay between the f and 2f pulses on the laser energy.;Few-cycle pulses were CE phase stabilized to 134 mrad rms and were used to perform above-threshold ionization and high harmonic generation.
机译：在这项研究中，由Kerr-lens锁模chi镜色散补偿的Ti：Sapphire激光振荡器稳定了脉冲序列的载波包络相（CE相位）演化。通过频谱加宽光子晶体光纤中的振荡器脉冲并干扰f和2f分量，可以获得与CE相变速率相对应的偏移频率。获得的偏移频率线宽为100 mHz，可以在几个小时内锁定。研究了用于激光振荡器的CE相位稳定的干涉仪中光程长度漂移的影响。通过稳定路径长度漂移，将干涉仪的噪声降低了几个数量级。;研究了基于光栅的chi脉冲多通放大器的CE相位漂移。发现在担架中将光栅间距改变1微米会导致CE相位偏移3.7 +/- 1.2 rad。通过反馈控制光栅间距，可将CE相位稳定在160 mrad rms误差内。通过锁定用于稳定振荡器脉冲的CE相位的f至2f干涉仪中的路径长度，可将放大后的激光脉冲的快速（> 3 Hz）CE相位漂移从79 mrad减少到48 mrad。还发现通过改变光栅间距，可以将CE相位移动并设置为2pi范围内的任何值。同样，CE相位可以在2pi范围内连续调制，同时保持171 mrad的相对相位误差。发现基于光栅的压缩机的CE相移稳定在230 mrad rms .;还研究了激光功率波动对CE相测量的影响。已发现，激光能量的1％波动在CE相位测量中引起160 mrad的误差。提出了两步模型来解释CE相位测量中的相位-能量耦合。该模型解释了实验观察到的f和2f脉冲之间的群时延对激光能量的依赖性。很少有脉冲周期的CE相位稳定到134 mrad rms，并用于执行阈值以上的电离和高谐波生成。

著录项

  • 作者

    Moon, Eric Wayne.;

  • 作者单位

    Kansas State University.;

  • 授予单位 Kansas State University.;
  • 学科 Physics Optics.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 136 p.
  • 总页数 136
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
  • 关键词

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