Professor Ding Xin is mainly engaged in researches of all solid state lasers, nonlinear optical frequency conversion and tunable laser technology. As a primary member, he participated and completed over 30 national and provincial projects including the National Natural Science Foundation, 863 Program, Program for Tianjin Science and Technology Development, Tianjin Natural Science Foundation and the Doctoral Fund. He is currently leading one National Natural Science Foundation and one Program for Tianjin Science and Technology Development, and participating in five other projects as the main participant. He has published 137 papers home and abroad, among which he is the first author for 31 papers, and the second or third author for 50 papers. In addition, he has 14 invention patents and 10 utility model patents authorized by China patent office.