Tiegen Liu was born in Tianjin, China, in 1955. He received the B.E. degree, the M.E. degree, and the Ph.D. degree in optical engineering from Tianjin University, China, in 1982, 1987, and 1999, respectively. He joined Tianjin University in 1982, where he is currently a Professor with the School of Precision Instrument and Opto-electronics Engineering. His research interests include optical fiber sensors, optical polarization technology, and optoelectronics measurement.

Prof. Liu serves as an executive council member and the council president of Opto-Electronic-Mechanical Technology & System Integration Chapter in the China Instrument and Control Society, the deputy director in the China Opto-Electronic Technology Professional Committee, the vice council president of Optical Instrument Chapter in China Instrument and Control Society, the council president in Tianjin Optical Society, the certified expert in China Trade Association for Anti-counterfeiting, and the editorial committee member in the journals of "Optoelectronics Letters", "Journal of Optoelectronics Laser", and "Optoelectronic Engineering". Prof. Liu has been serving as an academic committee member, an executive committee member of teachers' congress, and the director of teaching and research committee in Tianjin University. Meanwhile, he also served as the director of teachers' congress in School of Precision Instrument and Opto-electronic Engineering in Tianjin University. In addition, he serves as the head of the experts group for the review meetings organized by National Awards Office, Ministry of Science and Technology, Ministry of Education, Ministry of Environmental Protection, etc., as well as the assessment meetings for dozens of Key Laboratories in Tianjin City.