Special Section on Slow and Fast Light

Amplified slow light beam splitter and 1 s optical memory

[+] Author Affiliations
Shuo Shen

Fudan University, Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano-Photonic Structures, Ministry of Education, Shanghai 200433, China

Xiwei Xu

Fudan University, Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano-Photonic Structures, Ministry of Education, Shanghai 200433, China

Yanhong Xiao

Fudan University, Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano-Photonic Structures, Ministry of Education, Shanghai 200433, China

Opt. Eng. 53(10), 102703 (Jun 27, 2014). doi:10.1117/1.OE.53.10.102703
History: Received March 30, 2014; Revised May 7, 2014; Accepted May 7, 2014
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Abstract.  Using atomic motion to coherently spread light information stored in atoms provides a means to manipulate atom-light interactions. We demonstrate light splitting with moving atoms in a paraffin-coated vapor cell by using phase-sensitive degenerate four-wave mixing, or self-rotation. This scheme amplifies the slow light beam splitter signal, and, in the meantime, maintains the phase coherence between the beam-splitter channels. Light storage efficiency in the beam-splitting channel can also be enhanced. Furthermore, we demonstrate an optical memory exceeding 1 s, taking advantage of the gain from self-rotation and an atomic coherence composed of a fast-decaying part and a slow-decaying part. These results should find applications in optical memory, optical routers, and atomic coherence control.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Shuo Shen ; Xiwei Xu and Yanhong Xiao
"Amplified slow light beam splitter and 1 s optical memory", Opt. Eng. 53(10), 102703 (Jun 27, 2014). ; http://dx.doi.org/10.1117/1.OE.53.10.102703


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