High-speed transmission of adaptively modulated optical OFDM signals over multimode fibers using directly modulated DFBs

被引：109

作者：

Tang, JM ^{[1
]}

Lane, PM ^{[1
]}

Shore, KA ^{[1
]}

机构：

[1] Univ Coll N Wales, Sch Informat, Bangor LL57 1UT, Gwynedd, Wales

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2006年 / 24卷 / 01期

关键词：

communication system performance; optical fiber communication; optical modulation; orthogonal frequency division multiplexing (OFDM);

D O I：

10.1109/JLT.2005.860146

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel optical signal modulation concept of adaptively modulated optical orthogonal frequency division multiplexing (AMOOFDM) is proposed, and a comprehensive theoretical model of AMOOFDM modems is developed. Numerical simulations of the transmission performance of the AMOOFDM signals are undertaken in unamplified multimode fiber (MMF)-based links using directly modulated distributed feedback (DFB) lasers (DMLs). It is shown that 28 Gb/s over 3011 m and 10 Gb/s over 900 m transmission of intensity modulation and direct detection (IMDD) AMOOFDM signals at 1550 nm is feasible in DML-based links using MMFs with 3-dB effective bandwidths of 2011 MHz . km. Apart from a higher signal capacity, AMOOFDM also has a greater spectral efficiency and is less susceptible to different launching conditions, modal dispersion, and fiber types, compared with all existing schemes. In addition, a large noise margin of about 15 dB is also observed. The bits of resolution of analog-to-digital converters (ADCs) and the cyclic prefix of AMOOFDM symbols are the main factors limiting the maximum achievable performance, on which the influence of DMLs is, however, negligible under the optimum operating condition.

引用

页码：429 / 441

页数：13

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