Tunable Nd, La:SrF2 laser and passively Q-switched operation based on gold nanobipyramids saturable absorber
Zhang Feng1, 2, Zhang Hua-Nian1, 2, Liu Dan-Hua1, †, Liu Jie1, 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.