基于相位调制-相干检测的模分复用通信实验 
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A Communication Experiment Using Mode Division Multiplexing with Phase Modulation-Coherent Detection
图 & 表
图 1. 模分复用系统实验装置图
Fig. 1. Experimental setup of mode division multiplexing system
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图 2. 光子灯笼原理图
Fig. 2. Schematic of PL
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图 3. 光子灯笼少模输出端的模态图。(a) 1号光子灯笼;(b) 2号光子灯笼
Fig. 3. Modal graphs of the few-mode outputs of PLs. (a) No.1; (b) No.2
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图 4. 经10 km少模光纤传输后接收到的和Matlab处理过程中的信号星座图
Fig. 4. Constellation diagrams of received signals after 10 km FMF transmission and processed by Matlab
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图 5. 接收信号的误码特性曲线
Fig. 5. Bit error rate curves of received signals
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表 1光子灯笼各模式端口的插入损耗值
Table1. Insertion loss of each mode port of PL
| Mode | Insertion loss after back to backtransmission /dB | Insertion lossafter 10 km FMFtransmission /dB |
|---|
| LP01 | 3.64 | 5.56 | | LP11a | 2.85 | 5.61 | | LP11b | 4.31 | 6.56 | | LP21a | 5.84 | 7.16 | | LP21b | 6.89 | 8.81 | | LP02 | 10.22 | 12.01 |
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表 2光子灯笼背靠背连接时各模式间的串扰值
Table2. Crosstalks of different modes in back-to-back connection of PLs
| Mode | Crosstalk /dB |
|---|
| Input LP01 | Input LP11a | Input LP11b | Input LP21a | Input LP21b | Input LP02 |
|---|
| Output LP01 | | -20.20 | -20.93 | -31.81 | -28.32 | -31.67 | | Output LP11a | -34.38 | | -19.4 | -25.54 | -20.61 | -26.17 | | Output LP11b | -24.55 | -18.42 | | -29.22 | -24.41 | -25.06 | | Output LP21a | -36.69 | -24.5 | -24.63 | | -18.53 | -19.32 | | Output LP21b | -34.52 | -20.77 | -19.94 | -16.87 | | -18.16 | | Output LP02 | -23.05 | -21.62 | -19.96 | -17.94 | -18.22 | |
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表 3光子灯笼经10 km光纤连接后各模式间的串扰
Table3. Crosstalk between different modes of PLs connected by 10 km optical fiber
| Mode | Crosstalk /dB |
|---|
| Input LP01 | Input LP11a | Input LP11b | Input LP21a | Input LP21b | Input LP02 |
|---|
| Output LP01 | | -19.01 | -19.51 | -28.16 | -23.66 | -30.76 | | Output LP11a | -29.26 | | -16.61 | -25.06 | -18.11 | -24.51 | | Output LP11b | -21.76 | -17.56 | | -19.31 | -21.91 | -22.01 | | Output LP21a | -29.81 | -19.76 | -22.71 | | -15.96 | -17.41 | | Output LP21b | -29.51 | -18.86 | -18.86 | -15.31 | | -16.16 | | Output LP02 | -21.41 | -20.56 | -18.96 | -17.51 | -18.01 | |
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张强, 郭玉彬, 陈嘉轲, 胡贵军. 基于相位调制-相干检测的模分复用通信实验[J]. 中国激光, 2020, 47(3): 0306001. Zhang Qiang, Guo Yubin, Chen Jiake, Hu Guijun. A Communication Experiment Using Mode Division Multiplexing with Phase Modulation-Coherent Detection[J]. Chinese Journal of Lasers, 2020, 47(3): 0306001.
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