Single-photon stimulated four wave mixing at telecom band
  Single-photon stimulated four wave mixing (StFWM) processes have great potential for photonic quantum information processing, compatible with optical communication technologies and integrated optoelectronics. In this paper, we demonstrate single-photon StFWM process in a piece of optical fiber, with seeded photons generated by spontaneous four wave mixing process (SpFWM). The effect of the single-photon StFWM is confirmed by time-resolved four-photon coincidence measurement and variation of four-photon coincidence counts under different seed-pump delays. According to the experiment results, the potential performance of quantum cloning machine based on the process is analyzed. 
Shuai Dong, Xin Yao, Wei Zhang, Sijing Chen, Weijun Zhang, Lixing You,   Zhen Wang, and Yidong Huang
quant-ph