Chin. Phys. Lett.  2000, Vol. 17 Issue (7): 507-509    DOI:
Original Articles |
Noise Reduction in Photorefractive Image Amplification by Contradirectional Two-Wave Mixing in Rh-Doped BaTiO3 Crystal
XU Xin-Guang1;MU Xiao-Dong1;SHAO Zong-Shu1;DU Chen-Lin1;JIANG Min-Hua1;LUO Hao-Su2;XU Hai-Qing2
1State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800
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XU Xin-Guang, MU Xiao-Dong, SHAO Zong-Shu et al  2000 Chin. Phys. Lett. 17 507-509
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Abstract Low noise image amplification owing to contradirectional two-wave mixing (CTWM) is proposed and demonstrated in Rh-doped BaTiO3 crystal. Comparing with the conventional forward two-wave mixing scheme, an enhancement of signal-to-noise ratio in the order of 103 is obtained. The theoretical analyses are presented and give a reasonable explanation for the experimental results. The further discussion shows that CTWM scheme can also reduce the influence of the crystal absorption and crystal size on the two-wave mixing process to rise the signal beam gain.

Keywords: 42.65.Hw      42.70.Nq      42.79.-e     
Published: 01 July 2000
PACS:  42.65.Hw (Phase conjugation; photorefractive and Kerr effects)  
  42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)  
  42.79.-e (Optical elements, devices, and systems)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2000/V17/I7/0507
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XU Xin-Guang
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DU Chen-Lin
JIANG Min-Hua
LUO Hao-Su
XU Hai-Qing
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