title: Amplified spontaneous emission in a Ti:sapphire regenerative amplifier.
abstract: Amplified spontaneous emission power and contrast ratio in a linear miltipass Ti:sapphire regenerative amplifier with a wavelength centered at 1054 nm are calculated and measured. It is shown that the passive losses of a seed pulse and the losses in coupling to the regenerative amplifier cavity mode degrade the intensity contrast ratio to 10(-6)-10(-7). The advantage of an optical parametric chirped pulse amplifier with respect to the contrast ratio is discussed.
authors.affiliation: Department of Physics/220, College of Art and Science, University of Nevada, Reno, Nevada 89557-0058 , USA. ivanov@physics.unr.edu
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Ivanov
authors.forename: Anatoly
authors.initials: A
authors.lastname: Maksimchuk
authors.forename: Gerard
authors.initials: G
authors.lastname: Mourou