A high performance fast-Fourier-transform spectrum analyzer for measuring spin noise spectrums

doi:10.1088/1674-1056/ab9c04

Abstract A high performance fast-Fourier-transform (FFT) spectrum analyzer, which is developed for measure spin noise spectrums, is presented in this paper. The analyzer is implemented with a field-programmable-gate-arrays (FPGA) chip for data and command management. An analog-to-digital-convertor chip is integrated for analog signal acquisition. In order to meet the various requirements of measuring different types of spin noise spectrums, multiple operating modes are designed and realized using the reprogrammable FPGA logic resources. The FFT function is fully managed by the programmable resource inside the FPGA chip. A 1 GSa/s sampling rate and a 100 percent data coverage ratio with non-dead-time are obtained. 30534 FFT spectrums can be acquired per second, and the spectrums can be on-board accumulated and averaged. Digital filters, multi-stage reconfigurable data reconstruction modules, and frequency down conversion modules are also implemented in the FPGA to provide flexible real-time data processing capacity, thus the noise floor and signals aliasing can be suppressed effectively. An efficiency comparison between the FPGA-based FFT spectrum analyzer and the software-based FFT is demonstrated, and the high performance FFT spectrum analyzer has a significant advantage in obtaining high resolution spin noise spectrums with enhanced efficiency.

Keywords: fast Fourier transform spectrum analyzer field-programmable-gate-arrays (FPGA) spin noise spectrum

Received: 15 April 2020
Revised: 25 May 2020
Accepted manuscript online: 12 June 2020

PACS:

07.50.-e

(Electrical and electronic instruments and components)

Fund: Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDC07020200), the National Key R&D Program of China (Grant Nos. 2018YFA0306600 and 2016YFB0501603), the National Natural Science Foundation of China (Grant No. 11927811), the Chinese Academy of Sciences (Grants Nos. GJJSTD20170001 and QYZDY-SSW-SLH004), Anhui Initiative in Quantum Information Technologies, China (Grant No. AHY050000), and the Fundamental Research Funds for the Central Universities, China.

Corresponding Authors: Xi Qin
E-mail: qinxi630@ustc.edu.cn

Cite this article:

Yu Tong(仝煜), Lin Wang(王淋), Wen-Zhe Zhang(张闻哲), Ming-Dong Zhu(朱明东), Xi Qin(秦熙), Min Jiang(江敏), Xing Rong(荣星), Jiangfeng Du(杜江峰) A high performance fast-Fourier-transform spectrum analyzer for measuring spin noise spectrums 2020 Chin. Phys. B 29 090704

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A high performance fast-Fourier-transform spectrum analyzer for measuring spin noise spectrums

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