Quantum-dot based distributed feedback lasers and electro-absorption modulators for datacom applications

2012 14th International Conference on Transparent Optical Networks (ICTON) Pub Date : 2012-07-02 DOI:10.1109/ICTON.2012.6254489

D. Bimberg, M. Stubenrauch, G. Stracke, H. Schmeckebier, D. Arsenijevic

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引用次数: 5

Abstract

The unique properties of quantum dots (QDs) as gain material for semiconductor lasers result in advantageous characteristics like high temperature stability, low noise, low feedback sensitivity and low chirp. Their low internal losses make QD based devices suitable for high-speed telecommunication applications. Increase of data transmission rate by wavelength division multiplexing techniques requires temperature stable longitudinal single-mode transmitters. We present 1.3 μm index-coupled QD distributed feedback (DFB) lasers with p-doped active region showing wide temperature independent operation, high side-mode suppression ratio (>; 55 dB) and quantum efficiencies up to 40%. The data rate achieved by direct modulation is exceeded by using QD electro-absorption modulators (EAMs) based on the Quantum-Confined Stark Effect. Presently we achieve a 3 dB-bandwidth of 17 GHz and extinction ratios of 18 dB. Monolithic integration of both, DFB and EAM, into a single two-section device provides an inexpensive transmitter unit suitable for metropolitan area network applications.

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数据通信应用中基于量子点的分布式反馈激光器和电吸收调制器

量子点作为半导体激光器的增益材料具有高温稳定性、低噪声、低反馈灵敏度和低啁啾等优点。它们的低内部损耗使得基于量子点的器件适合高速通信应用。利用波分复用技术提高数据传输速率需要温度稳定的纵向单模发射机。本文设计了具有p掺杂有源区的1.3 μm折射率耦合QD分布反馈(DFB)激光器，具有宽温度无关工作、高侧模抑制比(>;55 dB)，量子效率高达40%。使用基于量子受限斯塔克效应的量子点电吸收调制器(EAMs)可以超过直接调制所达到的数据速率。目前我们实现了17ghz的3db带宽和18db消光比。DFB和EAM的单片集成到一个单一的两段设备中，提供了适合城域网应用的廉价传输单元。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 14th International Conference on Transparent Optical Networks (ICTON)

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