With energy-time entangled biphoton sources as the optical carrier and time-correlated single-photon detection for high-speed radio frequency(RF)signal recovery,the method of quantum microwave photonics(QMWP)has prese...With energy-time entangled biphoton sources as the optical carrier and time-correlated single-photon detection for high-speed radio frequency(RF)signal recovery,the method of quantum microwave photonics(QMWP)has presented the unprecedented potential of nonlocal RF signal encoding and efficient RF signal distilling from the dispersion interference associated with ultrashort pulse carriers.In this paper,its capability in microwave signal processing and prospective superiority are further demonstrated.Both QMWP RF phase shifting and transversal filtering functionality,which are the fundamental building blocks of microwave signal processing,are realized.Besides good immunity to the dispersion-induced frequency fading effect associated with the broadband carrier in classical MWP,a native two-dimensional parallel microwave signal processor is provided.These results well demonstrate the superiority of QMWP over classical MWP and open the door to new application fields of MWP involving encrypted processing.展开更多
As the main branch of microwave photonics,radio-over-fiber technology provides high bandwidth,low-loss,and long-distance propagation capability,facilitating wide applications ranging from telecommunication to wireless...As the main branch of microwave photonics,radio-over-fiber technology provides high bandwidth,low-loss,and long-distance propagation capability,facilitating wide applications ranging from telecommunication to wireless networks.With ultrashort pulses as the optical carrier,a large capacity is further endowed.However,the wide bandwidth of ultrashort pulses results in the severe vulnerability of high-frequency radio frequency(RF)signals to fiber dispersion.With a time-energy entangled biphoton source as the optical carrier combined with the singlephoton detection technique,a quantum microwave photonics method in radio-over-fiber systems is proposed and demonstrated experimentally.The results show that it not only realizes unprecedented nonlocal RF signal modulation with strong resistance to the dispersion but also provides an alternative mechanism to distill the RF signal out from the dispersion effectively.Furthermore,the spurious-free dynamic ranges of the nonlocally modulated and distilled RF signals have been significantly improved.With the ultra-weak detection and the high-speed processing advantages endowed by the low-timing-jitter single-photon detection,the quantum microwave photonics method opens new possibilities in modern communication and networks.展开更多
基金National Natural Science Foundation of China(12033007,12103058,61801458,61875205,91836301)Key Project of Frontier Science Research of Chinese Academy of Sciences(QYZDB-SSW-SLH007)+1 种基金Strategic Priority Research Program of Chinese Academy of Sciences(XDC07020200)Youth Innovation Promotion Association of the Chinese Academy of Sciences(2021408,2022413)。
文摘With energy-time entangled biphoton sources as the optical carrier and time-correlated single-photon detection for high-speed radio frequency(RF)signal recovery,the method of quantum microwave photonics(QMWP)has presented the unprecedented potential of nonlocal RF signal encoding and efficient RF signal distilling from the dispersion interference associated with ultrashort pulse carriers.In this paper,its capability in microwave signal processing and prospective superiority are further demonstrated.Both QMWP RF phase shifting and transversal filtering functionality,which are the fundamental building blocks of microwave signal processing,are realized.Besides good immunity to the dispersion-induced frequency fading effect associated with the broadband carrier in classical MWP,a native two-dimensional parallel microwave signal processor is provided.These results well demonstrate the superiority of QMWP over classical MWP and open the door to new application fields of MWP involving encrypted processing.
基金supported by the National Key Research and Development Program of China (2018YFB2201902, 2018YFB2201901, and 2018YFB2201903)partly supported by the National Natural Science Foundation of China (61925505, 61535012, 61705217, 12033007, 61875205, 61801458, and 91836301)+1 种基金Frontier Science Key Research Project of CAS (QYZDB-SSW-SLH007)Strategic Priority Research Program of CAS (XDC07020200)
基金National Natural Science Foundation of China(12033007,12103058,61535012,61705217,61801458,61875205,61925505,91836301)National Key Research and Development Program of China(2018YFB2201901,2018YFB2201902,2018YFB2201903)+3 种基金Key Project of Frontier Science Research of Chinese Academy of Sciences(QYZDB-SW-SLH007)Youth Innovation Promotion Association of the Chinese Academy of Sciences(2021408)Western Young Scholar Project of Chinese Academy of Sciences(XAB2019B15,XAB2019B17)Strategic Priority Research Program of Chinese Academy of Sciences(XDC07020200)。
文摘As the main branch of microwave photonics,radio-over-fiber technology provides high bandwidth,low-loss,and long-distance propagation capability,facilitating wide applications ranging from telecommunication to wireless networks.With ultrashort pulses as the optical carrier,a large capacity is further endowed.However,the wide bandwidth of ultrashort pulses results in the severe vulnerability of high-frequency radio frequency(RF)signals to fiber dispersion.With a time-energy entangled biphoton source as the optical carrier combined with the singlephoton detection technique,a quantum microwave photonics method in radio-over-fiber systems is proposed and demonstrated experimentally.The results show that it not only realizes unprecedented nonlocal RF signal modulation with strong resistance to the dispersion but also provides an alternative mechanism to distill the RF signal out from the dispersion effectively.Furthermore,the spurious-free dynamic ranges of the nonlocally modulated and distilled RF signals have been significantly improved.With the ultra-weak detection and the high-speed processing advantages endowed by the low-timing-jitter single-photon detection,the quantum microwave photonics method opens new possibilities in modern communication and networks.
