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Eighth Symposium on Novel Photoelectronic Detection Technology and Applications

Modulated pulse characteristics based on nonlinear frequency upconversion

Yan Li, Yongcheng Han, Guohua Gu, Weiji He, Qian Chen

Published Mar 27, 2022• 0 citations
Publisher

Abstract

We report on numerical analysis of the conversion efficiency under different pumping conditions in the nonlinear frequency upconversion system, the influence of initial frequency chirp is also discussed in detail. Our results demonstrate that the wave peak is proportional to the amplitude parameter U. In addition, the positive chirp is conducive to spectrum broadening, while the negative chirp does the opposite. These numerical investigation will be meaningful for further improving the conversion efficiency and provide some reference for quantum communications and quantum manipulation in the single-photon frequency upconversion process.

DOI
10.1117/12.2620750

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We report on numerical analysis of the conversion efficiency under different pumping conditions in the nonlinear frequency upconversion system, the influence of initial frequency chirp is also discussed in detail. Our results demonstrate that the wave peak is proportional to the amplitude parameter U. In addition, the positive chirp is conducive to spectrum broadening, while the negative chirp does the opposite. These numerical investigation will be meaningful for further improving the conversion efficiency and provide some reference for quantum communications and quantum manipulation in the single-photon frequency upconversion process.
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counts/pulse. The corresponding internal quantum conversion efficiency reached as high as 84.4%. The detector was then systematically characterized at different pump powers to investigate the quantum decoherence behavior. Here the reconstructed positive operator valued measure elements were equivalently illustrated with the Wigner function formalism, where the quantum feature of the detector is manifested by the presence of negative values of the Wigner function. In our experiment, pronounced negativities were attained due to the high detection efficiency and low background noise, explicitly showing the quantum feature of the detector. Such quantum detector could be useful in optical quantum state engineering, quantum information processing and communication.
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