title: Compact and efficient passively Q-switched laser at 473  nm with an Nd:YAG/YAG/Cr4+:YAG/YAG multifunctional composite crystal.
abstract: An Nd:YAG/YAG/Cr4+:YAG/YAG composite crystal and an LBO crystal were used to generate a passively Q-switched frequency-doubling 473 nm blue laser for the first time, to the best of our knowledge. The result demonstrated that the slope efficiency of this system reaches 18%, which is the highest in all the passively Q-switched 473 nm laser systems reported, to the best of our knowledge. Under the pumped power of 8.64 W, the maximum average output power of 0.93 W was obtained with a pulsewidth of 78 ns, and the repetition rate of 18.5 kHz.
authors.forename: Siqi
authors.initials: S
authors.lastname: Zhu
authors.forename: Haiqiong
authors.initials: H
authors.lastname: Zhou
authors.forename: Wei
authors.initials: W
authors.lastname: Jiang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Yin
authors.forename: Ge
authors.initials: G
authors.lastname: Zhang
authors.forename: Zhenqiang
authors.initials: Z
authors.lastname: Chen