100 Gb/s Multicarrier THz Wireless Transmission System With High Frequency Stability Based on A Gain-Switched Laser Comb Source

被引：94

作者：

Shams, H. ^{[1
]}

Shao, T. ^{[2
]}

Fice, M. J. ^{[1
]}

Anandarajah, P. M. ^{[2
]}

Renaud, C. C. ^{[1
]}

Van Dijk, F. ^{[3
]}

Barry, Liam P. ^{[2
]}

Seeds, Alwyn J. ^{[1
]}

机构：

[1] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England

[2] Dublin City Univ, Rince Inst, Radio & Opt Commun Lab, Dublin 9, Ireland

[3] III V Lab, F-91767 Palaiseau, France

来源：

IEEE PHOTONICS JOURNAL | 2015年 / 7卷 / 03期

基金：

英国工程与自然科学研究理事会; 芬兰科学院; 爱尔兰科学基金会;

关键词：

Microwave photonics; radio-over-fiber; fiber optics and optical communications; COHERENT DETECTION; COMMUNICATION; WDM;

D O I：

10.1109/JPHOT.2015.2438437

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：

We propose and experimentally demonstrate a photonic multichannel terahertz (THz) wireless system with up to four optical subcarriers and total capacity as high as 100 Gb/s by employing an externally injected gain-switched laser comb source. Highly coherent multiple optical carriers with different spacing are produced using the gain switching technique. Single-and multichannel Terahertz (THz) wireless signals are generated using heterodyne mixing of modulated single or multiple carriers with one unmodulated optical tone spaced by about 200 GHz. The frequency stability and the phase noise of the gain switched comb laser are evaluated against free-running lasers. Wireless transmission is demonstrated for single and three optical subcarriers modulated with 8 or 10 GBd quadrature phase-shift keying (QPSK) (48 or 60 Gb/s, respectively) or for four optical subcarriers modulated with 12.5 GBd QPSK (100 Gb/s). The system performance was evaluated for single-and multicarrier wireless THz transmissions at around 200 GHz, with and without 40 km fiber transmission. The system is also modeled to study the effect of the cross talk between neighboring subcarriers for correlated and decorrelated data. This system reduces digital signal processing requirements due to the high-frequency stability of the gain-switched comb source, increases the overall transmission rate, and relaxes the optoelectronic bandwidth requirements.

引用

页数：11

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