具有反馈的长光纤中受激布里渊散射的异常低阈值增益。

Abnormally low threshold gain of stimulated Brillouin scattering in long optical fiber with feedback.

作者信息

Kovalev V I, Harrison R G

机构信息

Department of Physics, Heriot-Watt University, Edinburgh EH144AS, UK.

出版信息

Opt Express. 2008 Aug 4;16(16):12272-7. doi: 10.1364/oe.16.012272.

DOI:10.1364/oe.16.012272

PMID:18679504

Abstract

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.

摘要

我们表明，在长（>1公里）光纤中产生受激布里渊散射（SBS）时，观察到相干斯托克斯发射的阈值出现在比SBS经典激光阈值增益显著更低的增益处。这种效应是由于在存在反馈的情况下强自发布里渊散射的相干再生放大。该效应的大小与相互作用长度成比例。