Frequency upconversion photon counting imaging based on Hadamard coding

Ying Zhang; YuQi Jiang; Tianyi Mao; Wenwen Zhang; GuoHua Gu; WeiJi He; Qian Chen

doi:10.1117/12.2620965

27 March 2022 Frequency upconversion photon counting imaging based on Hadamard coding

Ying Zhang, YuQi Jiang, Tianyi Mao, Wenwen Zhang, GuoHua Gu, WeiJi He, Qian Chen

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 1216912 (2022) https://doi.org/10.1117/12.2620965
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

The tight focused pump beam nonlinear frequency upconversion based on Hadamard coding is presented to acquire converted photon images. The pump beam is optimized by tight focusing to enhance its power density in nonlinear crystal. In order to reduce the distortion caused by the point spread function effect, the object is encoded by measurement matrices and the converted photons corresponding to each pattern is measured. Thus the converted image with sharp edges can be reconstructed by the measurements and the measurement matrices. In the experiment, the image with 64 × 64 pixels is acquired and the peak of the dark noise is less than0.7photons/spatial/second element for 10 ms measurement time.

Citation Download Citation

Ying Zhang, YuQi Jiang, Tianyi Mao, Wenwen Zhang, GuoHua Gu, WeiJi He, and Qian Chen "Frequency upconversion photon counting imaging based on Hadamard coding", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 1216912 (27 March 2022); https://doi.org/10.1117/12.2620965

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