Performance Investigation of 40?GB/s DWDM over Free Space Optical Communication System Using RZ Modulation Format

[摘要] We successfully demonstrate 40?GB/s 8 channels’ Dense Wavelength Division Multiplexing (DWDM) over free space optical (FSO) communication system. Each channel is transmitting 5?GB/s data rate in downstream separated by 0.8?nm (100?GHz) channel spacing with 1.8?GHz filter bandwidth. DWDM over FSO communication system is very effective in providing high data rate transmission with very low bit error rate (BER). The maximum reach of designed system is 4000?m without any compensation scheme. The simulation work reports minimum BER for Return-to-Zero (RZ) modulation format at different channels 1, 4, and 8 are found to be 2.32e-17, 1.70e-16, and 9.51e-15 at 4000?m distance, respectively. Sharp increase in BER occurs if data rate and distance increase up to 10?GB/s and 5000?m.

[学科分类] 光谱学