1977年生，物理学博士，三级研究员。2015年入选陕西省“中青年科技创新领军人才”，2016年获选中科院“西部之光”人才计划项目优秀入选者，2017年入选“中国科学院特聘研究员”计划特聘骨干人才。 多年来一直从事量子光学与量子信息方面的研究。1994年至1998年在山西大学电子信息技术系光电子技术专业攻读本科，获得工学学士。1998年至2001年在山西大学量子光学与光量子器件国家重点实验室攻读硕士。2005年至2009年在德国爱尔兰根—纽伦堡大学攻读博士。

量子时间同步，高精度时间频率传递，基于双飞秒光梳的高精度测距

迄今共发表论文70余篇，据Web of Science统计被引572次。申请国家发明专利6项，已获授权4项。

1.Baihong Li*, Ruifang Dong*, Conghua Zhou, Xiao Xiang, Yongfang Li, and ShougangZhang,“Theoretical extension and experimental demonstration of spectral compression in second-harmonic generation by Fresnel-inspired binary phase shaping,” Phys. Rev. A 97(5), 053806 (2018).
2.Conghua Zhou, Baihong Li, Xiao Xiang, Shaofeng Wang, Ruifang Dong*, TaoLiu*, Shougang Zhang. Realization of multiform time differentiations of pulsewith a Fourier pulse shaping system, Opt. Express 25(4), 4038-4045 (2017).
3.Shaofeng Wang, Xiao Xiang, Conghua Zhou, YiweiZhai, RunaiQuan, Mengmeng Wang, FeiyanHou, Shougang Zhang, Ruifang Dong*, Tao Liu*. Simulation of high SNR photodetector with transimpedance amplification circuit and its verification, Rev. Sci. Instruments, 88, 013107 (2017).
4.YiweiZhai, Ruifang Dong, Baihong Li, RunaiQuan,Mengmeng Wang, FeiyanHou, Tao Liu, ShougangZhang. Frequency entanglement characterization of short-pulse pumped SPDC biphoton source with a Mach-Zehnder interferometer, accepted by Journal of Physics B 2017.
5.RunaiQuan, YiweiZhai, Mengmeng Wang, FeiyanHou, Shaofeng Wang, Xiao Xiang, Tao Liu, Shougang Zhang &Ruifang Dong. Demonstration of quantum synchronization based on second-order quantum coherence of entangled photons. Scientific Reports 6, 30453 (2016).
6.FeiyanHou, Ruifang Dong, Xiao Xiang, RunaiQuan, Mengmeng Wang, YiweiZhai, Shaofeng Wang, Tao Liu, Shougang Zhang. An efficient source of frequency anti-correlated entanglement at telecom wavelength. Applied Physics B: Lasers and Optics, 122, 5, 1-8 (2016).
7.RunaiQuan, Mengmeng Wang, FeiyanHou, Zhaoyang Tai, Tao Liu, Shougang Zhang, Ruifang Dong*. Characterization of Frequency Entanglement under Extended Phase MatchingConditions. Applied Physics B: Lasers and Optics, 118, 431-437 (2015).
8.Ruifang Dong,AndersTipsmark,AmineLaghaout,Leonid A.Krivitsky, Miroslav Je?ek,and Ulrik L. Andersen,Generation of picosecond pulsed coherent state superpositions, JOSA B, Vol. 31 Issue 5, pp.1192-1201 (2014).
9.FeiyanHou, Rui-ang Dong, RunaiQuan, Yu Zhang, Yun Bai, Tao Liu,Shougang Zhang, Tongyi Zhang, “Dispersion-free quantum clock synchronization via fiber link”, Advances in Space Research 50, 1489–1494 (2012).
10.Ruifang Dong, Mikael Lassen, JoelHeersink, Christoph Marquardt, Radim Filip, GerdLeuchs, and Ulrik L. Andersen, Continuous Variable Entanglement Distillation of Non‐Gaussian States, Phys. Rev. A, 82, 012312 (2010).
11.Ruifang Dong, Mikael Lassen, JoelHeersink, Christoph Marquardt, Radim Filip, GerdLeuchs, and Ulrik L. Andersen, “Experimental entanglement distillation of mesoscopic quantum states”, Nature Physics, 4, 919-923 (2008).
12.Ruifang Dong, JoelHeersink, Joel F. Corney, Peter D. Drummond,GerdLeuchs, and Ulrik L. Andersen.Experimental evidence for Raman-induced limits to efficient squeezing in optical fibers, Opt. Lett., 33 (2), 116-118 (2008).
13.Ruifang Dong, JoelHeersink, Junichi Yoshikawa, OliverGl?ckl,Ulrik L. Andersen and GerdLeuchs, An efficient source of continuous variable polarization entanglement”, New J. Physics, 9, 410 (2007)
授权发明专利：
1.项晓，董瑞芳，刘涛，张首刚，基于气压调节的低真空无源光学谐振腔色散自动补偿系统，ZL201510823821.X。
2.董瑞芳，刘涛，张首刚，基于量子效应的干涉型光纤陀螺仪，ZL201110449108.5
3.刘涛，许冠军，董瑞芳，张首刚，一种低热噪声高反射光学复合膜结构及其制备方法，ZL201510141832.X。
4.刘杰，刘涛，董瑞芳，张首刚，一种基于远程端补偿的光纤光学频率传递方法，发明专利，ZL201510221740.2。