title: Design of a tunable time-delay element using multiple gain lines for increased fractional delay with high data fidelity.
abstract: A slow-light medium based on multiple, closely spaced gain lines is studied. The spacings and relative strengths of the gain lines are optimized by using the criteria of gain penalty and eye-opening penalty to maximize the fractional delay defined in terms of the best decision time for random pulse trains. Both numerical calculations and experiments show that an optimal design of a triple-gain-line medium can achieve a maximal fractional delay about twice that which can be obtained with a single-gain-line medium, at three times higher modulation bandwidth, while high data fidelity is still maintained.
authors.affiliation: The Institute of Optics, University of Rochester, Rochester, New York 14627, USA. zshi@optics.rochester.edu
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Shi
authors.forename: Ravi
authors.initials: R
authors.lastname: Pant
authors.forename: Zhaoming
authors.initials: Z
authors.lastname: Zhu
authors.forename: Michael D
authors.initials: MD
authors.lastname: Stenner
authors.forename: Mark A
authors.initials: MA
authors.lastname: Neifeld
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Gauthier
authors.forename: Robert W
authors.initials: RW
authors.lastname: Boyd