Cui, Z. et al. (n.d.). Experimental Study on a Passively Q-Switched Ho:YLF Laser with Polycrystalline Cr2+:ZnS as a Saturable Absorber*Supported by the National Natural Science Foundation of China under Grant Nos 61308009, 61405047, and 50990301, the Postdoctoral Science Foundation of China under Grant No 2013M540288, the Fundamental Research Funds for the Central Universities under Grant Nos HIT.NSRIF.2014044 and HIT.NSRIF.2015042, and the Science Fund for Outstanding Youths of Heilongjiang Province under Grant No JQ201310.. Chinese physics letters. pp. 187-. [Online].