Chinese Optics Letters, 2021, 19(7): , 网络出版: 2021-04-07

Heterodyne detection enhanced by quantum correlation

作者单位

Hubei University of Technology

Hubei University of Technology

摘要
Heterodyne detectors as phase-insensitive (PI) devices have found important applications in precision measurements such as space-based gravitational-wave (GW) observation. However, the output signal of a PI heterodyne detector is supposed to suffer from signal-to-noise ratio (SNR) degradation due to image band vacuum and imperfect quantum efficiency. Here we show that the SNR degradation can be overcome when the image band vacuum is quantum correlated with the input signal. We calculate the noise figure of the detector and prove the feasibility of heterodyne detection with enhanced noise performance through quantum correlation. This work should be of great interest to ongoing space-borne GW signal searching experiments.
Chinese Optics Letters, 2021, 19(7): , 网络出版: 2021-04-07

Heterodyne detection enhanced by quantum correlation

作者单位

Hubei University of Technology

Hubei University of Technology

引文
Xie Boya, Feng Sheng. Heterodyne detection enhanced by quantum correlation[J]. Chinese Optics Letters, 2021, 19(7):
Chinese Optics Letters, 2021, 19(7): , 网络出版: 2021-04-07

Heterodyne detection enhanced by quantum correlation

作者单位

Hubei University of Technology

Hubei University of Technology

基本信息
DOI: COL-0734
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