1-Gsymbol/s 64-QAM coherent optical transmission over 150 km

被引：26
|
作者：
Hongo, Jumpei [1 ]
Kasai, Keisuke [1 ]
Yoshida, Masato [1 ]
Nakazawa, Masataka [1 ]
机构：
[1] Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2007年 / 19卷 / 9-12期
关键词：
coherent transmission; frequency-stabilized laser; optical phase-locked loop (OPLL); quadrature amplitude modulation (QAM); spectral efficiency;
D O I：
10.1109/LPT.2007.894944
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：
Quadrature amplitude modulation (QAM) is an excellent modulation format for realizing optical communication systems with a high spectral efficiency of much greater than 1 bit/s/Hz. We describe QAM coherent optical communication that we achieved by using heterodyne detection with a frequency-stabilized fiber laser and an optical phase-locked loop (OPLL) technique. The phase error variance of the intermediate frequency signal of the OPLL was 6.1 x 10(-3) rad. A 1-Gsymbol/s 64-QAM coherent signal was successfully transmitted over 150 km.
引用
收藏
页码：638 / 640
页数：3
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