Noise limitations of Brillouin two-beam coupling: theory and experiment
Noise limitations of Brillouin two-beam coupling: theory and experiment
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DOI：
10.1364/josab.9.000391
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发表时间：
1992-03
影响因子：
1.9
通讯作者：
S. Sternklar;Y. Glick;S. Jackel
中科院分区：
文献类型：
--
作者：
S. Sternklar;Y. Glick;S. Jackel
本文对布里渊双光束耦合噪声进行了理论和实验研究，包括非耗尽和耗尽泵浦两种情况。的信号-噪声比（SNR）被证明是成比例的弱信号输入功率，以及在非耗尽制度的泵浦强度。泵浦耗尽导致SNR和增益显著降低，从而导致gBIpL = 20的最佳工作点。在λ = 1.06 μm处，每种噪声模式的最小可检测信号功率预测和测量值约为5 μW，它取决于频率和温度，而峰值增益也取决于布里渊耦合系数gB、相互作用长度和放大器的横截面积。
A theoretical and experimental study of noise in Brillouin two-beam coupling is presented, which includes both the nondepleted and the depleted pump regimes. The signal-to-noise ratio (SNR) is shown to be proportional to the weak signal input power as well as to the pump intensity in the nondepleted regime. Pump depletion causes both the SNR and the gain to degrade significantly, leading to an optimum working point of gBIpL ≃ 20. The minimum detectable signal power per mode of noise, predicted and measured to be approximately 5 μW at λ = 1.06 μm, is dependent on frequency and temperature, while the peak gain is also dependent on the Brillouin coupling coefficient gB, interaction length, and cross-sectional area of the amplifier.