Random distributed feedback fibre laser
Random distributed feedback fibre laser
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DOI：
10.1038/nphoton.2010.4
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发表时间：
2010-04-01
期刊：
影响因子：
35
通讯作者：
Podivilov, Evgenii V.
中科院分区：
文献类型：
--
作者：
Turitsyn, Sergei K.;Babin, Sergey A.;Podivilov, Evgenii V.
近年来，利用多重散射放大无序介质产生相干光的随机激光器的概念引起了人们的极大关注。在这里，我们展示了一个光纤激光器与无镜开放腔，通过瑞利散射，放大通过拉曼效应。光纤波导几何形状提供横向限制和有效的一维随机分布反馈，导致产生具有窄光谱的静止近高斯光束，并且具有与常规激光器相当的效率和性能。由于光纤的玻璃结构内的不均匀性的瑞利散射是非常弱的，使得所提出的随机分布反馈激光器的操作和性质与传统的随机激光器和传统的光纤激光器的操作和性质有很大的不同。
The concept of random lasers making use of multiple scattering in amplifying disordered media to generate coherent light has attracted a great deal of attention in recent years. Here, we demonstrate a fibre laser with a mirrorless open cavity that operates via Rayleigh scattering, amplified through the Raman effect. The fibre waveguide geometry provides transverse confinement and effectively one-dimensional random distributed feedback, leading to the generation of a stationary near-Gaussian beam with a narrow spectrum, and with efficiency and performance comparable to regular lasers. Rayleigh scattering due to inhomogeneities within the glass structure of the fibre is extremely weak, making the operation and properties of the proposed random distributed feedback lasers profoundly different from those of both traditional random lasers and conventional fibre lasers.