Directly Modulated VCSEL-Based Real-Time 11.25-Gb/s Optical OFDM Transmission Over 2000-m Legacy MMFs
Directly Modulated VCSEL-Based Real-Time 11.25-Gb/s Optical OFDM Transmission Over 2000-m Legacy MMFs
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DOI：
10.1109/jphot.2011.2182339
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发表时间：
2012-02
影响因子：
2.4
通讯作者：
E. Hugues-Salas;X. Jin;R. Giddings;Y. Hong;S. Mansoor;A. Villafranca;J. Tang
中科院分区：
文献类型：
--
作者：
E. Hugues-Salas;X. Jin;R. Giddings;Y. Hong;S. Mansoor;A. Villafranca;J. Tang
在基于直接调制垂直腔面发射激光器(DM-VCSEL)的端到端实时11.25 Gb/S光正交频分复用(OOFDM)系统中，首次利用传统的OM 1/OM 2多模光纤(MMF)以及简单的强度调制和直接检测(IMDD)进行了详细的实验探索，以求各种光学发射条件(包括中心发射和传统的偏置发射)在最大化传统MMF系统的传输距离方面的有效性。结果表明，在上述传统的MMF系统中，中心发射能够以11.25 Gb/S的原始信号比特率在2000m的史无前例的距离上实现自适应功率加载Oofdm传输，而光功率代价低至0.8db。当用传统的偏置发射取代中心发射时，传统MMF系统的传输距离减少到300m，相应的光功率损失增加到2.3dB.对不同发射条件下不同MMF IMDD系统配置测量的最大可达传输距离的比较表明，基于DM-VCSEL的自适应中心发射功率加载OOFDM是一种用于传统MMF系统的可行且经济有效的解决方案。这项工作可能会对已安装的MMF局域网升级到10 Gb/S或更高的网络具有巨大的潜力。
In directly modulated vertical cavity surface-emitting laser (DM-VCSEL)-based, end-to-end real-time, 11.25-Gb/s optical orthogonal frequency division multiplexing (OOFDM) systems utilizing legacy OM1/OM2 multimode fibers (MMFs), as well as simple intensity-modulation and direct-detection (IMDD) detailed experimental explorations, are undertaken, for the first time, for the effectiveness of various optical launching conditions, including center launching and conventional offset launching in maximizing the transmission distances of the legacy MMF systems. It is shown that, in the aforementioned legacy MMF systems, center launching enables an adaptive power-loaded OOFDM transmission at a raw signal bit rate of 11.25 Gb/s over an unprecedented distance of 2000 m with an optical power penalty as low as 0.8 dB. When center launching is replaced by conventional offset launching, the transmission distance of the legacy MMF system is reduced to 300 m, and the corresponding optical power penalty is increased to 2.3 dB. Comparisons of measured maximum achievable transmission distances of various MMF IMDD system configurations subject to different launching conditions show that DM-VCSEL-based, adaptive power-loaded OOFDM at center launching is a viable and cost-effective solution for use in legacy MMF systems. This work may have great potential for upgrading installed MMF local area networks to 10 Gb/s and beyond.