Wuhan;
National;
Laboratory;
for;
Optoelectronics,;
School;
of;
Optoelectronic;
Science;
and;
Engineering,;
Huazhong;
University;
of;
Science;
and;
Tech-nology,;
Wuhan;
430074,;
China;
三能级原子系统; 激光阈值; 无序介质; 随机介质; 太赫兹; 数值研究; 行为; 增益;