title: On-chip integratable all-optical quantizer using strong cross-phase modulation in a silicon-organic hybrid slot waveguide.
abstract: High performance all-optical quantizer based on silicon waveguide is believed to have significant applications in photonic integratable optical communication links, optical interconnection networks, and real-time signal processing systems. In this paper, we propose an integratable all-optical quantizer for on-chip and low power consumption all-optical analog-to-digital converters. The quantization is realized by the strong cross-phase modulation and interference in a silicon-organic hybrid (SOH) slot waveguide based Mach-Zehnder interferometer. By carefully designing the dimension of the SOH waveguide, large nonlinear coefficients up to 16,000 and 18,069 W(-1)/m for the pump and probe signals can be obtained respectively, along with a low pulse walk-off parameter of 66.7 fs/mm, and all-normal dispersion in the wavelength regime considered. Simulation results show that the phase shift of the probe signal can reach 8π at a low pump pulse peak power of 206 mW and propagation length of 5 mm such that a 4-bit all-optical quantizer can be realized. The corresponding signal-to-noise ratio is 23.42 dB and effective number of bit is 3.89-bit.
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Kang
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.|Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Xianting
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Xinzhu
authors.initials: X
authors.lastname: Sang
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Kuiru
authors.initials: K
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.|3Department of Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, NE1 8ST, United Kingdom.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Binbin
authors.initials: B
authors.lastname: Yan
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Xian
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Kangping
authors.initials: K
authors.lastname: Zhong
authors.affiliation: Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, 510006 Guangzhou, China.
authors.forename: Guiyao
authors.initials: G
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, P.O. Box72 (BUPT), Beijing, China.
authors.forename: Chongxiu
authors.initials: C
authors.lastname: Yu
authors.affiliation: Photonics Research Centre, Dublin Institute of Technology, Kevin Street, Dublin, Ireland.
authors.forename: Gerald
authors.initials: G
authors.lastname: Farrell
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Hwa
authors.initials: H
authors.lastname: Yaw Tam
authors.affiliation: Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: P K A
authors.initials: PKA
authors.lastname: Wai