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首页> 外文期刊>Photonics and Nanostructures: Fundamentals and Applications >Enhanced gain coefficient in Raman amplifier based on silicon nanocomposites
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Enhanced gain coefficient in Raman amplifier based on silicon nanocomposites

机译：基于硅纳米复合材料的拉曼放大器增强的增益系数

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In this paper, silicon nanoparticles dispersed into a silica phase by sol-gel processing has been investigated by structural and nonlinear-optical characterization. The structural characterization has been performed by energy filtered and scanning transmission electron microscopy. A silicon nanoparticles mean radius of about 49 nm and a nanoparticle density of about 1.62 × 10~8 dots/cm~2 have been obtained. Regarding nonlinear optics characterization, the observation of stimulated Raman scattering and the realization of a Raman amplifier based on silicon nanocomposites are described. Using a 1427 nm cw pump laser, amplification of Stokes signal, at 1542.2 nm, up to 1.4 dB/cm is demonstrated. A preliminary valuation of approximately a fivefold enhancement of the gain coefficient a significant reduction of threshold power are reported. Our findings have a potential interest for silicon-based Raman lasers.
机译：在本文中，通过结构和非线性光学表征研究了通过溶胶-凝胶工艺分散到二氧化硅相中的硅纳米颗粒。结构表征已通过能量过滤和扫描透射电子显微镜进行。硅纳米粒子的平均半径约为49 nm，纳米粒子的密度约为1.62×10〜8点/ cm〜2。关于非线性光学特性，描述了受激拉曼散射的观察和基于硅纳米复合材料的拉曼放大器的实现。使用1427 nm的连续泵浦激光器，可以显示Stokes信号在1542.2 nm处放大到1.4 dB / cm。据报道，增益系数大约提高了五倍，阈值功率大大降低了。我们的发现对基于硅的拉曼激光器具有潜在的兴趣。

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