Kerr-lens mode-locked polycrystalline Cr:ZnS femtosecond laser pumped by a monolithic Er:YAG laser
Hu Chengfeng
1
, Zhu Jiangfeng
1, †
, Wang Zhaohua
2
, Sun Xintong
1
, Wei Long
1
, Ling Weijun
3
, Dong Zhong
3
, Wang Qing
4
, Gao Chunqing
4
, Wei Zhiyi
1, 2, ‡
(color online) Spectra of the harmonic wavelengths.