title: Sub-10-fs deep-ultraviolet light source with stable power and spectrum.
abstract: In some applications of ultrafast spectroscopy that employ sub-10-fs pulses, the pulse spectrum and power need to be stable for several tens of minutes. In this study, we generate sub-10-fs deep-ultraviolet (DUV) pulses with such stabilities by chirped-pulse four-wave mixing. A power fluctuation of less than 3% rms was realized by employing stabilization schemes that employ a power stabilizer. The pulses generated in this study have been applied to transient absorption spectroscopy in the DUV with a sub-10-fs time resolution [Phys. Chem. Chem. Phys.14, 6200 (2012).10.1039/c2cp23649d]. This sub-10-fs DUV source has a similar performance to widely used noncollinear optical parametric amplifiers.
authors.affiliation: Advanced Ultrafast Laser Research Center, University of Electro-Communications, Chofugaoka, Chofu, Tokyo, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Kida
authors.forename: Kotaro
authors.initials: K
authors.lastname: Okamura
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Kobayashi