title: Double nanosecond pulses generation in ytterbium fiber laser.
abstract: Double pulse generation mode for nanosecond ytterbium fiber laser was developed. Two sequential 60-200 ns laser pulses with variable delay between them were generated by acousto-optic modulator opening with continuous diode pumping. A custom radio frequency generator was developed to produce two sequential "opening" radio pulses with a delay of 0.2-1 μs. It was demonstrated that double pulse generation did not decrease the average laser power while providing the control over the laser pulse power profile. Surprisingly, a greater peak power in the double pulse mode was observed for the second laser pulse. Laser crater studies and plasma emission measurements revealed an improved efficiency of laser ablation in the double pulse mode.
authors.affiliation: Saint-Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Pr. 49, Saint Petersburg, Russia.
authors.forename: V P
authors.initials: VP
authors.lastname: Veiko
authors.affiliation: Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov Str., 38, Moscow, Russia.
authors.forename: V N
authors.initials: VN
authors.lastname: Lednev
authors.affiliation: Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov Str., 38, Moscow, Russia.
authors.forename: S M
authors.initials: SM
authors.lastname: Pershin
authors.affiliation: Saint-Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Pr. 49, Saint Petersburg, Russia.
authors.forename: A A
authors.initials: AA
authors.lastname: Samokhvalov
authors.affiliation: Saint-Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Pr. 49, Saint Petersburg, Russia.
authors.forename: E B
authors.initials: EB
authors.lastname: Yakovlev
authors.affiliation: Saint-Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Pr. 49, Saint Petersburg, Russia.
authors.forename: I Yu
authors.initials: IY
authors.lastname: Zhitenev
authors.affiliation: Saint-Petersburg State University of Information Technologies, Mechanics and Optics, Kronverksky Pr. 49, Saint Petersburg, Russia.
authors.forename: A N
authors.initials: AN
authors.lastname: Kliushin