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首页> 外文期刊>Japanese journal of applied physics >Real-Time Time-Frequency Imaging of Ultrashort Laser Pulses Using an Echelon Mirror
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Real-Time Time-Frequency Imaging of Ultrashort Laser Pulses Using an Echelon Mirror

机译：使用梯形镜对超短激光脉冲进行实时时频成像

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摘要

We demonstrate real-time time-frequency imaging for the autocorrelation traces of ultrashort laser pulses using an echelon mirror fabricated on a Ni block with 500 steps; the echelon mirror is employed to generate spatially encoded time delays for the probe pulses. By using the frequency-resolved optical gating (FROG) technique with the echelon mirror, the time-frequency images of ultrashort laser pulses were successfully mapped in real-time. The chirp characteristics of the laser pulses were also evaluated with the phase-retrieval procedure on a single-shot basis. Our technique provides significant advantages over conventional autocorrelation and FROG techniques, such as single-shot detection of time-frequency images, a small spot size at a nonlinear crystal, chirp-free characteristics of echelon mirrors, and ultrafast measurement capabilities by simply replacing the nonlinear crystal with samples. Hence, we believe that it becomes a powerful spectroscopic tool for monitoring ultrashort laser pulses and for investigating ultrafast dynamics of materials.
机译：我们演示了使用在500步的镍块上制造的梯形反射镜对超短激光脉冲的自相关迹线进行实时时频成像；梯形镜用于为探测脉冲生成空间编码的时间延迟。通过将频率分辨光学选通（FROG）技术与梯形镜配合使用，可以成功地实时绘制超短激光脉冲的时频图像。激光脉冲的线性调频特性也在单次触发时通过相位检索程序进行了评估。与传统的自相关和FROG技术相比，我们的技术具有显着的优势，例如时频图像的单次检测，非线性晶体上的光斑尺寸小，梯形镜的无chi特性以及只需更换非线性即可实现超快测量能力水晶与样品。因此，我们相信它已成为监视超短激光脉冲和研究材料超快动力学的强大光谱工具。

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  • 来源
    《Japanese journal of applied physics》 |2011年第10issue1期|p.102701.1-102701.5|共5页
  • 作者

    Ikufumi Katayama; Hiroyuki Sakaibara; Jun Takeda;

  • 作者单位

    Interdisciplinary Research Center, Yokohama National University, Yokohama 240-8501, Japan;

    Department of Physics, Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan;

    Department of Physics, Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan;

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