Tunable Nd, La:SrF<sub>2</sub> laser and passively Q-switched operation based on gold nanobipyramids saturable absorber

Tunable Nd, La:SrF₂ laser and passively Q-switched operation based on gold nanobipyramids saturable absorber

Zhang Feng^{1, 2}, Zhang Hua-Nian^{1, 2}, Liu Dan-Hua^{1, †}, Liu Jie^{1, 2, ‡}, Ma Feng-Kai³, Jiang Da-Peng³, Pang Si-Yuan³, Su Liang-Bi³, Xu Jun⁴

(color online) (a) Output spectra of the Nd,La:SrF₂ disordered crystal under continuous wave and Q-switched operation. (b) Repetition rate and pulse width versus absorbed pump power. (c) Pulse trains versus the absorbed pump power on a time scale of 20 s. (d) The beam quality of passively Q-switched Nd,La:SrF₂ laser.