Abnormally low threshold gain of stimulated Brillouin scattering in long optical fiber with feedback.
Abnormally low threshold gain of stimulated Brillouin scattering in long optical fiber with feedback.
复制标题
带反馈的长光纤中受激布里渊散射的阈值增益异常低。
DOI：
10.1364/oe.16.012272
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发表时间：
2008
期刊：
影响因子：
3.8
通讯作者：
R. Harrison
中科院分区：
文献类型：
--
作者：
V. Kovalev;R. Harrison
我们表明，在长（> 1 km）光纤中产生受激布里渊散射（SBS）时，观察相干斯托克斯发射的阈值明显低于 SBS 的经典激光阈值增益。该效应是由于强自发布里渊散射的相干再生放大造成的，这种现象在存在反馈的情况下发生。效果的大小与相互作用的长度成正比。
We show that in the generation of stimulated Brillouin scattering (SBS) in long (> 1 km) fiber, the threshold for observing coherent Stokes emission occurs at notably lower gain than the classical lasing threshold gain for SBS. The effect is due coherent regenerative amplification of strong spontaneous Brillouin scattering, which occurs in the presence of feedback. The magnitude of the effect scales with the length of interaction.