Enhanced gain coefficient in Raman amplifier based on silicon nanocomposites

被引：23

作者：

Ferrara, M. A. ^{[1
]}

Sirleto, L. ^{[1
]}

Nicotra, G. ^{[2
]}

Spinella, C. ^{[2
]}

Rendina, I. ^{[1
]}

机构：

[1] CNR, Inst Microelect & Microsyst, I-80131 Naples, Italy

[2] CNR, Inst Microelect & Microsyst, I-95121 Catania, Italy

来源：

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS | 2011年 / 9卷 / 01期

关键词：

Stimulated Raman scattering; Nanostructured silicon; Raman amplifier; SCATTERING;

D O I：

10.1016/j.photonics.2010.07.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 x 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. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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