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- W4321272745 abstract "Image amplification using photorefractive two-wave mixing is attractive since high gain and high signal-to-noise ratios are achievable using relatively low-power lasers. Huignard et. al. have achieved high gains in Bi 12 SiO 20 (BSO) using the DC field and moving grating technique 1 . The disadvantages of this technique are the uniform illumination and external frequency shift requirements. Another option is the use of alternating electric fields as suggested by Stepanov and Petrov 2 . This technique has been demonstrated in BTO 2 and GaAs 3 . It maintains the 90 o phase shift between the incident fringe pattern and holographic grating required for image amplification, while allowing enhancement of the refractive index change via the external field. Other advantages include increased stability, no requirement for uniform illumination, and the avoidance of the electrode shadowing problem. In addition, the trap saturation regime (i. e. the maximum possible grating amplitude for a given material) can be reached at very high fields. The application of this technique to BSO has been suggested previously 2,3,4 , and preliminary results are presented here." @default.
- W4321272745 created "2023-02-18" @default.
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- W4321272745 date "1988-01-01" @default.
- W4321272745 modified "2023-09-25" @default.
- W4321272745 title "Two-wave Mixing Gain in BSO with Applied Alternating Electric Fields" @default.
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- W4321272745 doi "https://doi.org/10.1364/nlopm.1988.mf11" @default.
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