1.8k citations · 3.3k across the 15 of their papers we have counts for
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113 km Free-Space Time-Frequency Dissemination at the 19th Decimal Instability
Qi Shen, Jian-Yu Guan, Ji-Gang Ren +28
Optical clock networks play important roles in various fields, such as precise navigation, redefinition of "second" unit, and gravitational tests. To establish a global-scale optic…
Spaceborne low-noise single-photon detection for satellite-based quantum communications
Meng Yang, Feihu Xu, Ji-Gang Ren +9
Single-photon detectors (SPDs) play important roles in highly sensitive detection applications, such as fluorescence spectroscopy, remote sensing and ranging, deep space optical co…
An ultra-sensitive balanced detector with low noise for continuous-variable quantum key distribution
Qi-Ming Lu, Qi Shen, Yuan Cao +2
A well-balanced detector with high sensitivity and low noise is presented in this paper. The two-stage amplification structure is used to increase electronic gain while keeping an…
A Multi-chain Measurements Averaging TDC Implemented in a 40 nm FPGA
Qi Shen, Shubin Liu, Binxiang Qi +4
A high precision and high resolution time-to-digital converter (TDC) implemented in a 40 nm fabrication process Virtex-6 FPGA is presented in this paper. The multi-chain measuremen…
A Fast Improved Fat Tree Encoder for Wave Union TDC in an FPGA
Qi Shen, Lei Zhao, Shubin Liu +5
Up to the present, the wave union method can achieve the best timing performance in FPGA based TDC designs. However, it should be guaranteed in such a structure that the non-thermo…