title: 1 kHz 3.3 μm Nd:YAG KTiOAsO₄ optical parametric oscillator system for laser ultrasound excitation of carbon-fiber-reinforced plastics.
abstract: We present a new laser prototype for laser ultrasonics excitation. The fundamental wavelength of a Q-switched Nd:YAG laser with a repetition rate of 1 kHz is converted to 3.3 μm with a KTiOAsO4 optical parametric oscillator. The achieved pulse energy at 3.3 μm is 1.7 mJ, and the pulse duration at the fundamental wavelength of 1.06 μm has been measured to be 21 ns. The ultrasonic excitation efficiency is about 3.5 times better compared to the application of state-of-the-art CO2 lasers.
authors.forename: Oliver
authors.initials: O
authors.lastname: Puncken
authors.forename: David Mendoza
authors.initials: DM
authors.lastname: Gandara
authors.forename: Marcin
authors.initials: M
authors.lastname: Damjanic
authors.forename: Peter
authors.initials: P
authors.lastname: Mahnke
authors.forename: Ralf B
authors.initials: RB
authors.lastname: Bergmann
authors.forename: Michael
authors.initials: M
authors.lastname: Kalms
authors.forename: Peter
authors.initials: P
authors.lastname: Peuser
authors.forename: Peter
authors.initials: P
authors.lastname: Wessels
authors.forename: Jörg
authors.initials: J
authors.lastname: Neumann
authors.forename: Ulf
authors.initials: U
authors.lastname: Schnars