Professor Yao is an academician of the Chinese Academy of Social Sciences and is a professor and director of the Institute of Laser & Opto-electronics, Tianjin University, China.

Professor Yao has long been engaged in the research of nonlinear optical frequency laser and converter techniques. His research of high efficient frequency multiplier lasers, super-power solid lasers, tunable lasers, nonlinear optics and laser applications have all reached international advanced standards. His theory of computation of optimum phase matching of biaxial crystal has been called the “Techniques of Yao” and ” Methods of Yao ” and widely used by international academic circles.