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1.武汉光迅科技股份有限公司,武汉 430205
2.国家电网有限公司信息通信分公司,北京 100761
段明雄(1996-),男,云南保山人。工程师,学士,主要研究方向为超长距无中继光传输系统。
龙函,工程师。E-mail:longhan106@163.com
纸质出版日期:2021-06-10,
收稿日期:2020-11-06,
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段明雄, 朱京, 卢贺, 等. 匹配滤波在相干光纤通信系统中的特性研究[J]. 光通信研究, 2021,(3):33-37.
DUAN Ming-xiong, ZHU Jing, LU He, et al. Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System[J]. Study on Optical Communications, 2021,(3):33-37.
段明雄, 朱京, 卢贺, 等. 匹配滤波在相干光纤通信系统中的特性研究[J]. 光通信研究, 2021,(3):33-37. DOI: 10.13756/j.gtxyj.2021.03.008.
DUAN Ming-xiong, ZHU Jing, LU He, et al. Study on the Characteristics of Matched Filtering for Coherent Optical Fiber Transmission System[J]. Study on Optical Communications, 2021,(3):33-37. DOI: 10.13756/j.gtxyj.2021.03.008.
针对相干光纤通信系统中匹配滤波(如根升余弦滤波器)对系统的影响,文章在不同光学带宽、残余色散以及非线性情况下,对不同滚降因子
R
f
的系统特性进行了研究。文章分别仿真研究了256 Gbit/s偏振复用16阶正交幅度调制(PDM-16QAM)信号在光学带宽为33、50及100 GHz时的传输特性、残余色散在-300~300 ps/nm区间内的特性和注入功率为-3~4 dBm情况下传输1 200 km光纤链路的特性。仿真结果表明,对于光学带宽受限的系统,
R
f
选取(1+
R
f
)
B
(
B
为信号波特率)与系统光学带宽相近的值为宜;对于光学带宽接近两倍波特率的系统,滚降因子
R
f
选取0.2~0.5为宜。
Aiming at the influence of matched filter (e.g.root raised cosine filter) on the coherent optical fiber communication system
the effect of roll-off factor (
R
f
) are studied under different value of optical bandwidth
residual dispersion and nonlinearity. Simulations are carried out for 256 Gbit/s Polarization Division Multiplexing-16 Quadrature Amplitude Modulation (PDM-16QAM) signals when the optical bandwidth are 33
50 and 100 GHz
the residual dispersion ranging from-300 to 300 ps/nm and launched power ranging from-3 to 4 dBm in a 1 200 km optical fiber link. The simulations show that a good transmission performance can be achieved for limited optical bandwidth system when
R
f
is set to the value of (1+
R
f
)
B
(
B
is the Baud rate of the signal) that similar to the system optical bandwidth. When optical bandwidth near or exceed 2 times Baud rate of signals
R
f
should be set between 0.2 and 0.5 to achieve a better transmission performance.
相干光通信匹配滤波根升余弦单模光纤
coherent optical communicationsmatched filterroot raised cosinesingle mode fiber
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Zhang P, Xi L, Yuan J, et al. Fiber Nonlinearity-insensitive OSNR Monitoring for Coherent PM-QPSK-Nyquist-WDM System[J]. Optical Fiber Technology, 2017, 36(1): 215-221.
Zhu Y, Jiang M, Chen Z, et al. Terabit Faster-than-Nyquist PDM 16-QAM WDM Transmission with a Net Spectral Efficiency of 7.96 bit/s/Hz[J]. Journal of Lightwave Technology, 2018, 36(14): 2912-2919.
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