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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
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| 1State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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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.
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| Keywords:
42.65.Hw
42.70.Nq
42.79.-e
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Published: 01 July 2000
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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42.79.-e
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(Optical elements, devices, and systems)
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