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Estimation of THz field strength by an electro-optic sampling technique using arbitrary long gating pulses
Laser Physics Letters ( IF 1.7 ) Pub Date : 2019-10-23 , DOI: 10.1088/1612-202x/ab4d56
D S Sitnikov 1 , S A Romashevskiy 1 , A V Ovchinnikov 1 , O V Chefonov 1 , A B Savel’ev 2 , M B Agranat 1
Affiliation  

We demonstrate a simple approach to retrieve the original peak electric field (E-field) strength of high-intensity THz pulses using an electro-optic sampling (EOS) technique and the Poynting flux approach. The latter supposes assessment of THz pulse intensity by measurement of pulse energy, duration and spot size, but its applicability to a few-cycle THz pulse needs detailed consideration. We applied a deconvolution procedure to the raw EOS data to retrieve the THz field waveform. We describe a two-step procedure that allows us to assess the field strength of an extreme THz field. First, the EOS measurements of the THz field should be performed at low pulse energies to retrieve the THz waveform and estimate pulse duration and amplitudes of each particular oscillation. Next, the field strength of an extreme THz pulse can be assessed from the Poynting flux approach with correction to the abovementioned data obtained from the EOS measurements. We show good experimental coincidence ...

中文翻译:

使用任意长选通脉冲的电光采样技术估算THz场强

我们演示了一种简单的方法,可以使用电光采样(EOS)技术和Poynting通量方法来检索高强度THz脉冲的原始峰值电场(E-field)强度。后者假定通过测量脉冲能量,持续时间和光斑大小来评估THz脉冲强度,但是需要详细考虑其对几个周期THz脉冲的适用性。我们对原始EOS数据应用了反卷积过程,以检索THz场波形。我们描述了一个两步过程,使我们可以评估极端THz场的场强。首先,应在低脉冲能量下对THz场进行EOS测量,以检索THz波形并估算脉冲持续时间和每个特定振荡的幅度。下一个,太赫兹脉冲的场强可以通过校正从EOS测量获得的上述数据的Poynting通量方法来评估。我们表现​​出良好的实验巧合...
更新日期:2019-10-24
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