HE Qixin

Professional title:Assistant professor

Office No.:010-51688333


2018 Ph.D. Electrical Circuit and System, Jilin University

2013 B.S. Electronic & Information Engineering, Jilin University

Professional Experience

Qixin He was born on September 22, 1992. He received his BS degree and PhD degree in Electronic & Information Engineering and Electrical Circuit & System from Jilin University, PR China, in 2013 and 2018, respectively. During 2016 to 2018, he was a visiting PhD student in Electrical and Computer Engineering at Rice University (Rice University Laser Science Group). He has served at School of Science, Beijing Jiaotong University as lecturer since 2018. His research focuses on the optical measurement technology and laser spectroscopy based trace gas sensor systems.

Research Field

Dr. He's research mainly focuses on photoelectric detection and photoelectric sensing. Topics of interest include cavity enhanced absorption spectroscopy, wavelength modulation spectroscopy, faraday rotation spectroscopy, wheelset size measurement based on structured light, railway wheel flat detection and so on.


  1. Natural Science Foundation of China (Nos. 61905009)
  2. National Natural Science Foundation of China (No. 51935002)
  3. Fundamental Research Funds for the Central Universities (2019RC002)

Teaching Courses

Analog and Digital Circuits

Photoelectric Signal Processing

Machine Vision and Measurement Technology

Physical Experiment


  1. He Q, Feng Q, Li J. Long-Term Stable Online Acetylene Detection by a CEAS System with Suppression of Cavity Length Drift[J]. Sensors, 2019, 19(3): 508-1~11.
  2. Gao R, He Q, Feng Q. Railway Wheel Flat Detection System Based on a Parallelogram Mechanism[J]. Sensors, 2019, 19(16): 3614-1~13.
  3. He Q , Li J, Feng Q . Ppb-level formaldehyde detection system based on a 3.6 mu m interband cascade laser and mode-locked cavity enhanced absorption spectroscopy with self-calibration of the locking frequency [J]. Infrared Physics & Technology,2020,105 103205,1350-4495
  4. Gao R ,  He Q ,  Feng Q , et al. In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor[J]. Sensors, 20(17):4969.
  5. He Q, Zheng C, Zheng K , et al. Off-axis integrated cavity output spectroscopy for real-time methane measurements with an integrated wavelength-tunable light source[J]. Infrared Physics & Technology, 2021:103705.
  6. Ran Y ,  He Q ,  Feng Q , et al. High-Accuracy On-Site Measurement of Wheel Tread Geometric Parameters by Line-Structured Light Vision Sensor[J]. IEEE Access, 2021, PP(99):1-1.