title: Spectral compression of single-photon-level laser pulse.
abstract: We experimentally demonstrate that the bandwidth of single photons laser pulse is compressed by a factor of 58 in a periodically poled lithium niobate (PPLN) waveguide chip. A positively chirped single photons laser pulse and a negatively chirped classical laser pulse are employed to produce a narrowband single photon pulse with new frequency through sum-frequency generation. In our experiment, the frequency and bandwidth of single photons at 1550 nm are simultaneously converted. Our results mark a critical step towards the realization of coherent photonic interface between quantum communication at 1550 nm and quantum memory in the near-visible window.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser plasma (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Yuanhua
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser plasma (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Tong
authors.initials: T
authors.lastname: Xiang
authors.affiliation: Department of Physics, Jiangxi Normal University, Nanchang 330022, China.
authors.forename: Yiyou
authors.initials: Y
authors.lastname: Nie
authors.affiliation: Department of Physics, Jiangxi Normal University, Nanchang 330022, China.
authors.forename: Minghuang
authors.initials: M
authors.lastname: Sang
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|Key Laboratory for Laser plasma (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen