title: Injection-seeded pulsed Ti:sapphire laser with novel stabilization scheme and capability of dual-wavelength operation.
abstract: A gain-switched, single-frequency titanium-sapphire laser for atmospheric humidity measurements using the differential absorption lidar technique operating in the 820 nm wavelength region is described. The laser is pumped by a frequency-doubled, flashlamp-pumped Nd:YAG laser at a repetition rate of 50 Hz and injection seeded by two external-cavity-diode lasers. The system yields pulses with an energy of 15 mJ and high spectral purity. We describe a novel active injection-locking technique that avoids the problems of established methods like dither-lock or ramp-and-fire. Furthermore, our method opens the possibility to switch between two wavelengths for alternating shots, in contrast to most established techniques that only allow operation at one wavelength.
authors.affiliation: Max-Planck-Institute for Meteorology, Bundestrasse 53, D-20146 Hamburg, Germany. k.ertel@rl.ac.uk
authors.forename: Klaus
authors.initials: K
authors.lastname: Ertel
authors.forename: Holger
authors.initials: H
authors.lastname: Linné
authors.forename: Jens
authors.initials: J
authors.lastname: Bösenberg