Single-shot cross-correlator using a long-wavelength sampling pulse |
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Authors: | Ma Jingui Yuan Peng Wang Yongzhi Zhang Dongfang Zhu Heyuan Qian Liejia |
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Institution: | Department of Optical Science and Engineering, Fudan University, Shanghai, China. |
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Abstract: | We present a single-shot cross-correlating scheme capable of high dynamic range and large temporal window for pulse contrast characterization. By adopting a long-wavelength sampling pulse parametrically converted from the pulse under test, wavelength combination in the correlating process allows the use of a large noncollinear phase-matching angle in periodically poled lithium niobate crystal, matches the high-sensitivity detection system consisting of a fiber array and a photomultiplier tube, and favors the elimination of optical scattering noise. The prototype experiments demonstrate a detectable contrast maximum up to ~10(9), temporal window of ~50?ps, and resolution of ~1?ps, using <0.5?mJ input energy. |
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