Single-shot measurement of THz pulses |
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Authors: | Lei Yang Lei Hou Chengang Dong Wei Shi |
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Affiliation: | (Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi,Xi’an University of Technology,Xi’an 710048,China) |
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Abstract: | Terahertz(THz) waves have shown a broad prospect in the analysis of some dielectric materials because of their special properties. For the ultrafast irreversible processes, the THz single-shot measurement is a good choice. In this paper,a single-shot system is investigated, where a pump beam is used to generate THz pulses with high electrical field by optical rectification in LiNbO_3, the probe beam with wavefront tilted by a blazed grating is used for single-shot measurement. The time window is up to 90 ps, the signal to noise ratio is 2000 : 1, the spectrum covers from 0.1 THz to about 2.0 THz, and the spectral resolution is 0.011 THz. The single-shot measurement result agrees well with that of a traditional electrical-optic sampling method. |
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