Tan Wei, Qiu Xiao-Dong, Zhao Gang, Hou Jia-Jia, Jia Meng-Yuan, Yan Xiao-Juan, Ma Wei-Guang, Zhang Lei, Dong Lei, Yin Wang-Bao, Xiao Lian-Tuan, Jia Suo-Tang. Double resonant sum-frequency generation in an external-cavity under high-efficiency frequency conversionJ. Acta Physica Sinica, 2016, 65(7): 074202. DOI: 10.7498/aps.65.074202