64/128-QAM Half-Cycle Subcarrier Modulation for Short-Reach Optical Communications

被引：9
|
作者：
Tang, Jin [1 ]
He, Jing [1 ]
Li, Danyu [1 ]
Chen, Ming [1 ]
Chen, Lin [1 ]
机构：
[1] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Direct detection; intensity modulation; optical fiber communication; quadrature amplitude modulation; subcarrier modulation; TRANSMISSION; GENERATION;
D O I：
10.1109/LPT.2014.2368614
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：
The half-cycle subcarrier modulation (SCM) with 64/128-quadrature-amplitude modulation (QAM) format in short-reach optical communications system is experimentally demonstrated. Without utilizing erbium-doped fiber amplifier, we have demonstrated the transmission of single-polarization 64/128-QAM half-cycle SCM using cost-effective directly modulated laser and also transmission of dual-polarization signal using a pair of external modulators. The experiment is enabled by spectral-efficient overlap frequency-domain-equalization and polarization division multiplexing channel estimation based on a pair of time-interleaved training sequences. Utilizing an electrical bandwidth of only 3 GHz, the bit-error rate (BER) of the 32.5-Gb/s dual-polarization 64-QAM format after 20-km fiber transmission is under 3.8x10(-3), and BER of the 38-Gb/s dual-polarization 128-QAM format is under 2.4 x 10(-2).
引用
收藏
页码：284 / 287
页数：4
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