title: 1.1 MW peak power in doubly QML composite Nd:YVO4/Nd:YVO4/Nd:YVO4/KTP sub-nanosecond green laser with EO and Bi-GaAs.
abstract: By simultaneously employing electro-optic (EO) modulator and Bi-doped GaAs, dual-loss-modulated Q-switched and mode-locked (QML) multi-segment composite Nd:YVO4/Nd:YVO4/Nd:YVO4/KTP sub-nanosecond green laser is demonstrated with low repetition rate and high peak power. When the incident pump power is up to 6.93 W, only one mode-locking pulse underneath a Q-switching envelope is generated with sub-nanosecond pulse duration at one kilohertz repetition rate. An average output power of 445 mW and a pulse duration of 399 ps are obtained with the incident pump power of 11.13 W, corresponding to a peak power of 1.115 MW which is the highest one in doubly QML sub-nanosecond green laser by now. The laser characteristics are better than those obtained with EO and GaAs. The experimental results indicate that Bi-GaAs is a promising saturable absorber for dual-loss-modulated QML laser.
authors.forename: Shixia
authors.initials: S
authors.lastname: Li
authors.forename: Dechun
authors.initials: D
authors.lastname: Li
authors.forename: Shengzhi
authors.initials: S
authors.lastname: Zhao
authors.forename: Guiqiu
authors.initials: G
authors.lastname: Li
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Li
authors.forename: Hui
authors.initials: H
authors.lastname: Qiao