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

页码：284 / 287

页数：4

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