| 偏振复用QPSK相干光数字通信系统实验研究 |
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| 引用本文： | 唐进,陈林,肖江南. 偏振复用QPSK相干光数字通信系统实验研究[J]. 光电子．激光, 2012, 0(10): 1895-1900 |
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| 作者姓名： | 唐进 陈林 肖江南 |
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| 作者单位： | 湖南大学信息科学与工程学院微纳光电器件及应用教育部重点实验室;湖南大学信息科学与工程学院微纳光电器件及应用教育部重点实验室;湖南大学信息科学与工程学院微纳光电器件及应用教育部重点实验室 |
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| 基金项目： | 国家高科技研究发展“863”计划(2009AA01A347);国家自然科学基金(60977049)资助项目 |
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| 摘 要： | 建立了偏振复用正交相移键控(QPSK)传输及相干检测的数字通信实验系统,并分析系统的性能。40Gbit/s的偏振复用QPSK信号在单模光纤(SMF)中传输了100km;信号光与本振光在接收端进行混频并下变频,最后用数字信号处理(DSP)算法对接收信号离线处理。比较了光纤传输前后不同的光信噪比(OSNR)下的误码率(BER),实验结果表明,所使用的DSP算法能克服光纤信道对信号的主要损伤,对高速的相干检测信号进行有效的恢复。
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| 关 键 词： | 相干光通信 数字信号处理(DSP) 数字通信系统 正交相移键控(QPSK) |
Experiment on a polarization division multiplexed QPSK coherent optical digital communication system |
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| XIAO Jiang-nan. Experiment on a polarization division multiplexed QPSK coherent optical digital communication system[J]. Journal of Optoelectronics·laser, 2012, 0(10): 1895-1900 |
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| Authors: | XIAO Jiang-nan |
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| Affiliation: | Key Laboratory of Micro/Nano Optoelectronic Devices of Ministry of Education,School of Information Science and Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Micro/Nano Optoelectronic Devices of Ministry of Education,School of Information Science and Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Micro/Nano Optoelectronic Devices of Ministry of Education,School of Information Science and Engineering,Hunan University,Changsha 410082,China |
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| Abstract: | An experimental digital communication system of polarization division multiplexed quadrature phase shift keying(QPSK) signal transmission and coherent detection is successfully built.In the experiment,the 40 Gbit/s polarization division multiplexed QPSK signal is transmitted over 100 km in single-mode fiber.At the receiver,the optical signal is mixed with a local oscillator and down-converted,then processed by digital signal processing(DSP) algorithm off-line.Comparing the bit error rates and constellations of the received signal under different optical signal-to-noise ratio(OSNR) values before and after transmission over fiber,the experimental results show that detected the DSP algorithm can overcome the major channel damage to the signal,and effectively recover the high-speed coherent signal. |
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| Keywords: | coherent optical communication digital signal processing(DSP) digital communication system quadrature phase shift keying(QPSK) |
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