| 摘要 |
The invention relates to a low-noise amplification device of an optical wave. Signal wave (Fs) to be amplified interferes with a pump wave (Fp) in such a nonlinear medium (1) as a photorefractive crystal. To reduce the noise considerably, even to eliminate it, the establishing of noise-generating interferences therefore is prevented by moving, by rotation around an axis O, the nonlinear medium.
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