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Chinese Physics Letters

High-gain coherent CW image amplifier with a BaTiO 3 crystal

Zhang Zhiguo, Dadi Wang, Jiang Yandao, Zhang Shiming, Jin Fuhui, Peixian Ye

Published Jun 1, 1989• 0 citations
Publisher
DOI
10.1088/0256-307x/6/6/012

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Low noise image amplification owing to contradirectional two-wave mixing (CTWM) is proposed and demonstrated in Rh-doped BaTiO 3 crystal. Comparing with the conventional forward two-wave mixing scheme, an enhancement of signal-to-noise ratio in the order of 10 3 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.