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建立了一种基于模式选择性光子灯笼型模式复用/解复用器的3×3模分复用通信实验系统,给出了系统的结构框图并阐述了其工作原理。分别利用模式为LP_(01)、LP_(11a)和LP_(11b)的信号传输信道作为独立信道,采用强度调制和直接探测系统,实现了3×4.25Gbit/s伪随机信号在10km少模光纤中的良好传输。实验测试了接收信号的波形、眼图和误码率。实验结果表明:当接收功率分别为-19.1dBm、-15.8dBm、-16.6dBm时,模式为LP_(01)、LP_(11a)和LP_(11b)三路信号的误码率均可达到10~(-3)。
A 3 × 3 mode multiplexed communication experiment system based on mode selective photonic lantern mode multiplexer / demultiplexer is established. The block diagram of the system is given and its working principle is illustrated. The signal transmission channels of LP_ (01), LP_ (11a) and LP_ (11b) were modeled as independent channels by using the mode of intensity modulation and direct detection, respectively, to realize the 3 × 4.25Gbit / In the good transmission. Experimental test of the received signal waveform, eye diagram and bit error rate. The experimental results show that when the received power is -19.1dBm, -15.8dBm and -16.6dBm respectively, the BER of LP_ (01), LP_ (11a) and LP_ (11b) (-3).