[1] Hebei Univ Technol, Ctr Adv Laser Technol, Hebei Key Lab Adv Laser Technol & Equipment, Tianjin 300401, Peoples R China
[2] CNOOC Energy Technol & Serv, Tianjin 300450, Peoples R China
[3] Harbin Inst Technol, Sch Astronaut, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150001, Peoples R China