title: Frequency-doubled passively Q-switched microchip laser producing 225  ps pulses at 671  nm.
abstract: We report a 671 nm laser source emitting 225 ps pulses with an average power of 55 mW and a repetition rate of 444 kHz. The system consists of a 1342 nm SESAM Q-switched Nd:YVO4microchip master oscillator and a dual-stage Nd:YVO4power amplifier. The 1342 nm signal was frequency-doubled to 671 nm using a periodically poled lithium niobate crystal. This laser source provides a practical alternative for applications requiring high energy picosecond pulses, such as time-gated Raman spectroscopy.
authors.forename: Jari
authors.initials: J
authors.lastname: Nikkinen
authors.forename: Ville-Markus
authors.initials: VM
authors.lastname: Korpijärvi
authors.forename: Iiro
authors.initials: I
authors.lastname: Leino
authors.forename: Antti
authors.initials: A
authors.lastname: Härkönen
authors.forename: Mircea
authors.initials: M
authors.lastname: Guina