title: Stacked optical precursors from amplitude and phase modulations.
abstract: We report the generation of stacked optical precursors from a laser beam whose amplitude or phase is modulated by sequenced on-off step waveforms. Making use of the constructive interference between the precursors produced from different steps, as well as the main field, we generate optical transient pulses having peak powers of eight times the input power with electromagnetically induced transparency in laser-cooled atoms.
authors.affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
authors.forename: J F
authors.initials: JF
authors.lastname: Chen
authors.forename: Heejeong
authors.initials: H
authors.lastname: Jeong
authors.forename: L
authors.initials: L
authors.lastname: Feng
authors.forename: M M T
authors.initials: MM
authors.lastname: Loy
authors.forename: G K L
authors.initials: GK
authors.lastname: Wong
authors.forename: Shengwang
authors.initials: S
authors.lastname: Du
mesh_terms: D004574:Electromagnetic Fields; D007834:Lasers; D055620:Optical Phenomena