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arXiv 1208.4067physics.optics
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用自参考光谱干涉法测量单次激发60 dB动态范围Laser对比度

Single-Shot 60 dB Dynamic Range Laser Contrast Measurement Using Self-Referencing Spectral Interferometry

Sasi Palaniyappan, R. P. Johnson, T. Shimada, R. C. Shah, D. Jung, D. C. Gautier, B. M. Hegelich, J. C. Fernandez

摘要:

激光脉冲的高动态范围对比度测量通常通过直接在时域中将激光脉冲与自生成的参考激光脉冲互相关来获得。可替代地,还可以在光谱域中测量激光脉冲与参考脉冲的光谱干涉图,可以使用傅里叶逆变换从该光谱干涉图提取高动态范围对比度测量。在这里,我们演示了单次拍摄60 dB动态范围的激光对比度测量的逆傅立叶变换到时域的测量光谱干涉图。该结果直接提供了激光脉冲与参考脉冲的互相关,只要在激光脉冲和参考脉冲之间施加足够的时间延迟。然后通过测量已知的预脉冲以及扫描三阶自相关器测量值来交叉校准方法。

英文摘要:

High dynamic range contrast measurement of laser pulses is typically obtained by cross-correlating the laser pulse with a self-generated reference laser pulse directly in the temporal domain. Alternatively, it is also possible to measure the spectral interferogram of the laser pulse with the references pulse in the spectral domain, from which the high dynamic range contrast measurement can be extracted using inverse Fourier-transformation. Here, we demonstrate single-shot 60 dB dynamic range laser contrast measurement by inverse Fourier-transforming the measured spectral interferogram into temporal domain. The result directly provides the cross-correlation of the laser pulse with the reference pulse provided there is enough time-delay imposed between the laser and reference pulses. Then method is cross-calibrated by measuring known pre-pulses along with scanning third-order auto-correlator measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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