Chinese Optics Letters, 2012, 10 (12): 123202, Published Online: Oct. 19, 2012
Few-cycle mid-infrared pulse full characterization in single shot 
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320.7090 Ultrafast lasers 320.7100 Ultrafast measurements 320.7160 Ultrafast technology 140.7090 Ultrafast lasers
Abstract
We build a frequency resolved optical gating (FROG) setup based on the second harmonic generation (SHG) FROG to characterize the mid-infrared (MIR) few-cycle laser pulse in single shot basis. Considering the extremely wide bandwidth, we use 20-μm-thick BBO crystal as the nonlinear medium, and correct the spectral response with the frequency summing efficiency. Spatial splitting is adopted to avoid additional material dispersion. In combination with a 4f imaging, this configuration enables the setup to run in single shot. With the central wavelength of 1.8 μm, the measured pulse has a duration of 9.3 fs, which corresponds to about 1.5 cycles.
Canhua Xu, Chuang Li, Liwei Song, Ding Wang, Yuxin Leng. Few-cycle mid-infrared pulse full characterization in single shot[J]. Chinese Optics Letters, 2012, 10(12): 123202.
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