Yujun Zhang (Zhang Yujun), Male, born in 1964, Ph.D, Associate Professor. Main interests are technology and application of photoelectron, optical signal process, spectroscopic methods for trace gases and new environmental pollution monitoring technology. The research currently emphasis focus on differential optical absorption spectroscopy, tunable diode laser absorption spectroscopy, laser induced fluorescence, lidar and FTIR for pollution monitoring applications. Graduated from Xi'Dian University of China, Dr. Zhang studied and worked at Kwangju Institute of Science and Technology, Korea (K-JIST) as Postdoctoral. Dr. Zhang carried out several projects from national 863 plan, the Chinese Academy of Sciences, Ministry of science and technology and industrial companies.