[5] 2015.11 - Present   Senior Postdoctoral Scientist
     Russell Division, Max Planck Institute for the Science of Light, Germany
     Fiber-based optical tweezers and optomechanics

• Team leader: optical tweezers and optomechanics;
• Particle guidance in hollow-core PCFs; flying particle sensors in hollow-core PCFs; Particle metrology & gas spectroscopy in hollow-core fiber;
• Optomechanics on tapererd glass-fiber “nanospike”; demonstration of self-aligned coupling into hollow-core PCFs using the nanospike;
• Precision measurement using optomechanics.

[4] 2013.07 - 2015.10    Postdoctoral Fellow
     Russell Division, Max-Planck Institute for the Science of Light, Germany
     Supercontinuum generation in soft-glass fiber/PCF

• Supported by Max Planck Fellowship;
• Fabrication of soft-glass/silica hybrid waveguides with extremely high nonlinearity; research on a novel "nanospike" waveguide to realize low threshold-energy mid-infrared supercontinuum generation.

[3] 2012.01 – 2013.07   Research Assistant and Ph.D. Candidate        
      Dept. of Electronic Engineering, Tsinghua University 
      Distributed fiber birefringence characterization using stimulated Brillouin scattering (SBS)

• Supported by Natural Science Foundation of China (NSFC);
• Use polarization properties of SBS to monitor fiber beat length, birefringence and differential group delay in a distributed manner. This can be useful for the performance evaluation of the next generation high-speed fiber communication systems and optical networks.

[2] 2010.09 – 2011.12   Research Assistant and Visiting Ph.D. student
      Dept. of Physics, University of Ottawa, Canada 
      Pushing the measurement resolution limit of distributed fiber Brillouin sensors

• Theoretical modelling and experimental study on the polarization properties of Brillouin scattering process in waveguide structures; 
• Demonstrate that fiber inhomogeneity can introduce polarization dependence of Brillouin linewidth and peak frequency in SMF, setting the fundamental limit of the temperature/strain sensing resolution.

[1] 2007.09 – 2010.08   Research Assistant and Ph.D. student
      Dept. of Electronic Engineering, Tsinghua University
      Long-distance distributed fiber vibration sensor using Mach-Zehnder interferometry

• Supported by National Key Technology R&D Program;
• Theoretical modelling and experimental characterization of the polarization fading effect in Mach-Zehnder interferometer;
• Develop a positioning error estimation theory for the distributed fiber vibration sensor and further demonstrate a positioning error reduction technique via spectrum reshaping;
• Demonstrate distributed vibration sensor with sensing range up to 80 km, positioning error < 10 m and response time < 1 s. The system has been commercialized, and was successfully applied for the intrusion detection in Shanghai World EXPO 2010.