Investigation on competition between the input signal and noise in a Brillouin amplifier

Investigation on competition between the input signal and noise in a Brillouin amplifier
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布里渊放大器输入信号与噪声竞争的研究

DOI:
10.1007/s00340-011-4534-z
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发表时间:
2011-05
期刊:
Applied Physics B: Lasers and Optics
影响因子:
--
通讯作者:
Zhu, C. Y.
Zhu, C. Y.
中科院分区:
其他
文献类型:
--
作者:
Gao, W.;Lu, Z. W.;He, W. M.;Zhu, C. Y.

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从理论和实验上研究了布里渊放大器中输入信号和噪声之间的竞争机制,以及泵浦脉冲相对于信号脉冲的延迟时间对这种竞争的影响。结果表明,随着输入信号强度的增加,放大的布里渊散射(ABS)噪声逐渐减弱,而信号放大占主导地位。当输入信号与泵浦光强度的比值大于10−4时,ABS噪声将几乎完全被抑制。为了获得高信噪比和高放大倍数,需要将延迟时间控制在抽运脉冲半宽范围内。
We theoretically and experimentally investigate the competition mechanism between the input signal and noise in a Brillouin amplifier, and the influence of the delay time of the pump pulse relative to the signal pulse on this competition. Results show that as the input signal intensity increases, the amplified Brillouin scattering (ABS) noise gradually weakens, while the signal amplification predominates. When the ratio of the input signal to the pump intensity is greater than 10−4, the ABS noise will be almost completely suppressed. The delay time should be controlled as the pump pulse half-width to achieve high signal-noise-ratio and high amplification.
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