Characteristics of the OPG System USIG Quasiphase-Matched Nonlinear Crystals for 1.6 μm CO2 Dial Yasukuni Shibata, Chikao Nagasawa and Makoto Abo EPJ Web of Conferences, 119 (2016) 17011 Published online: 07 June 2016 DOI: 10.1051/epjconf/201611917011