title: A high-peak-power UV picosecond-pulse light source based on a gain-switched 1.55 microm laser diode and its application to time-resolved spectroscopy of blue-violet materials.
abstract: We generated sub-kilowatt peak-power and 6-ps duration 390-nm optical pulses via the fourth harmonic generation of amplified optical output from a gain-switched 1.55-microm laser diode. We obtained a power-conversion-efficiency of 12% from 1.55-microm to 390-nm light, and subsequently applied the ultraviolet pulses to time-resolved spectroscopy of blue-violet luminescent materials, including a Coumarine dye solution and nitride semiconductor materials using single-photon and two-photon excitation schemes.
authors.affiliation: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8579, Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Sato
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Kono
authors.forename: Kyosuke
authors.initials: K
authors.lastname: Saito
authors.forename: Ki-ichi
authors.initials: K
authors.lastname: Sato
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yokoyama