title: Ultrawideband monocycle pulse generation based on delayed interference of π/2 phase-shift keying signal.
abstract: We propose a scheme to generate ultrawideband (UWB) monocycle pulses using delayed interference of a π/2 phase-shift keying (PSK) signal. The PSK signal is generated with an optical phase modulator. A fiber-based delay interferometer is used to provide the delay together with a ±π/2 phase shift between the signals in its two arms before the interference. The two opposite phase shifts correspond to the generation of a pair of polarity-reversed UWB monocycle pulses. The full width at half maximum of the pulses is ~68 ps and the 10 dB fractional bandwidth is 168%.
authors.affiliation: Department of Electronic Engineering and Center for Advanced Research in Photonics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong.
authors.forename: Yongheng
authors.initials: Y
authors.lastname: Dai
authors.forename: Jiangbing
authors.initials: J
authors.lastname: Du
authors.forename: Xuelei
authors.initials: X
authors.lastname: Fu
authors.forename: Gordon K P
authors.initials: GK
authors.lastname: Lei
authors.forename: Chester
authors.initials: C
authors.lastname: Shu