CRYSTAL ORIENTATION DEPENDENCE OF THE SNR FOR SIGNAL BEAM AMPLIFICATION IN PHOTOREFRACTIVE BATIO3

被引：3

作者：

JOSEPH, J ^{[1
]}

SINGH, K ^{[1
]}

PILLAI, PKC ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DEPT PHYS,PHOTON GRP,NEW DELHI 110016,INDIA

来源：

OPTICS AND LASER TECHNOLOGY | 1991年 / 23卷 / 04期

关键词：

PHOTOREFRACTIVE CRYSTALS; 2-BEAM COUPLING; SIGNAL BEAM AMPLIFICATION; SIGNAL TO NOISE RATIO;

D O I：

10.1016/0030-3992(91)90090-B

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In signal beam amplification by two-beam coupling in BaTiO3 photorefractive crystals, beam fanning in the direction of the amplified signal reduces the signal-to-noise ratio (SNR). The dependence of the SNR and the signal beam gain on the crystal orientation are analysed using a HeNe laser. It is found that orientating the crystal for maximum gain gives poor signal-to-noise ratio. A compromise has to be made between the SNR and high gain for optimum signal amplification.

引用

页码：237 / 240

页数：4

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