title: Photonic ultra-wideband pulse generation, hybrid modulation and dispersion-compensation-free transmission in multi-access communication systems.
abstract: We propose and demonstrate a scheme for optical ultrawideband (UWB) pulse generation by exploiting a half-carrier-suppressed Mach-Zehnder modulator (MZM) and a delay-interferometer- and wavelength-division-multiplexer-based, reconfigurable and multi-channel differentiator (DWRMD). Multi-wavelength, polarity- and shape-switchable UWB pulses of monocycle, doublet, triplet, and quadruplet are experimentally generated simply by tuning two bias voltages to modify the carrier-suppression ratio of MZM and the differential order of DWRMD respectively. The pulse position modulation, pulse shape modulation, pulse amplitude modulation and binary phase-shift keying modulation of UWB pulses can also be conveniently realized with the same scheme structure, which indicates that the hybrid modulation of those four formats can be achieved. Consequently, the proposed approach has potential applications in multi-shape, multi-modulation and multi-access UWB-over-fiber communication systems.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China.
authors.forename: Kang
authors.initials: K
authors.lastname: Tan
authors.forename: Jing
authors.initials: J
authors.lastname: Shao
authors.forename: Junqiang
authors.initials: J
authors.lastname: Sun
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
mesh_terms: D004581:Electronics / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation / Q000379:methods*; D007368:Interferometry / Q000295:instrumentation / Q000379:methods*; D008962:Models, Theoretical; D013685:Telecommunications / Q000295:instrumentation*