Measuring spatial chirp in ultrashort pulses using single-shot Frequency-Resolved Optical Gating
Measuring spatial chirp in ultrashort pulses using single-shot Frequency-Resolved Optical Gating
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DOI：
10.1364/oe.11.000068
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发表时间：
2003-01-13
期刊：
影响因子：
3.8
通讯作者：
Trebino, R
中科院分区：
文献类型：
--
作者：
Akturk, S;Kimmel, M;Trebino, R
我们表明，时空畸变，空间啁啾，是自然和容易测量的单次版本的二次谐波产生频率分辨光学门控（SHG FROG）（包括极其简单的版本，GRENOUILLE）。虽然SHG FROG轨迹通常是对称的，但具有空间啁啾的脉冲产生的剪切轨迹大约是脉冲空间啁啾的两倍。因此，轨迹剪切明确地揭示了脉冲空间啁啾的幅度和符号。然后，空间啁啾的影响可以从轨迹中去除，强度和相位与时间也可以检索到，从而产生空间啁啾脉冲在空间和时间上的完整描述。(C) 2002年美国光学学会。
We show that the spatio-temporal distortion, spatial chirp, is naturally and easily measured by single-shot versions of second-harmonic generation frequency-resolved optical gating (SHG FROG) (including the extremely simple version, GRENOUILLE)'. While SHG FROG traces are ordinarily symmetrical, a pulse with spatial chirp yields a trace with a shear that is approximately twice the pulse spatial chirp. As a result, the trace shear unambiguously reveals both the magnitude and sign of the pulse spatial chirp. The effects of spatial chirp can then be removed from the trace and the intensity and phase vs. time also retrieved, yielding a full description of the spatially chirped pulse in space and time. (C) 2002 Optical Society of America.