Acta Optica Sinica, Volume. 41, Issue 6, 0606003(2021)
Crosstalk Mitigation Technology in Mode Group Division Multiplexing Transmission Based on Precoding
A precoding scheme based on single-end channel estimation is proposed to mitigate crosstalk in received signals in intensity modulation direct detection (IM-DD) mode group division multiplexing transmission system based on photonic lantern. The scheme uses a signal feedback mechanism which is made up of a circulator and a splitter. Signals in receiving ends will return to the transmitting end for single-end channel estimation and the channel transmitting matrix will be used for precoding. The experimental results show that after the precoding processing in the back-to-back and 500-m few mode fiber mode group division multiplexing transmission systems, the transmitted power of LP01--LP01 and LP11a--LP11b channel signals can be reduced about 3 dB and 1 dB respectively when the bit error ratio (BER) is at the threshold of 1.3×10 -2 forward error correction (FEC). This paper provides an effective solution to reduce signal crosstalk in point-to-multipoint IM-DD mode group multiplexing transmission.
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Huiwen Fu, Ziyue Zhu, Jian Chen. Crosstalk Mitigation Technology in Mode Group Division Multiplexing Transmission Based on Precoding[J]. Acta Optica Sinica, 2021, 41(6): 0606003
Category: Fiber Optics and Optical Communications
Received: Sep. 8, 2020
Accepted: Nov. 9, 2020
Published Online: Apr. 7, 2021
The Author Email: Chen Jian (chenjian@shu.edu.cn)