Chin. Phys. Lett.  2007, Vol. 24 Issue (5): 1248-1251    DOI:
Original Articles |
Optical Amplification and Slow Light Based on Two-Wave Mixing at Large Modulation Depth
ZHANG Yun-Dong;YE Jian-Bo;QIU Wei
Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150001
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ZHANG Yun-Dong, YE Jian-Bo, QIU Wei 2007 Chin. Phys. Lett. 24 1248-1251
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Abstract Based on Kukhtarev's equations, we derive the formulae of intensity-coupling coefficient, the phase-coupling coefficient and the group velocity at large modulation depth. It is theoretically shown that the signal beam can be amplified after passing through the photorefractive crystal and the group velocity reduced to m/s, even cm/s. Meanwhile, we also analyse the influence of the thermal excitation rate and the large signal effects on optical amplification and reduction of light propagation in photorefractive two-wave mixing.
Keywords: 42.25.Bs      78.20.Bh      42.70.Nq     
Received: 12 January 2007      Published: 23 April 2007
PACS:  42.25.Bs (Wave propagation, transmission and absorption)  
  78.20.Bh (Theory, models, and numerical simulation)  
  42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I5/01248
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Articles by authors
ZHANG Yun-Dong
YE Jian-Bo
QIU Wei
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[9] Solymar L, Webb D J and Grunnet-Jepsen A 1996 The Physics andApplications of Photorefractive Materials (Oxford: Clarendon) p49
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