Nsengiyumva Isidore, Mwangi Elijah, Kamucha George
Department of Electrical Engineering, Pan African University, P.O. Box 62000, Nairobi, 00200, Kenya.
Faculty of Engineering, University of Nairobi, P.O. Box 30197, Nairobi, 00100, Kenya.
Heliyon. 2022 Apr 22;8(4):e09308. doi: 10.1016/j.heliyon.2022.e09308. eCollection 2022 Apr.
Optical time domain multiplexed (OTDM) technology helps to respond to the need for increased capacity and demand in internet traffic using optical transmissions. High-speed optical networks are highly affected by chromatic dispersion (CD) that causes pulse broadening and intersymbol interference (ISI) at the light detector. This paper presents a comparative analysis of chromatic dispersion compensation on 10 Gbps single mode fibre (SMF) and 40 Gbps OTDM operating at C-band using Gaussian apodized linear chirped fibre Bragg grating, Erbium Doped Fibre Amplifier (EDFA) and uniform fibre Bragg grating (UFBG) hybrid approach in OptiSystem 18. A cascade of four UFBG and chirped Bragg gratings design approach presents minimal improvement in the quality factor and achievable single mode fibre length. Quality factor results at a reference wavelength of 1550 nm were obtained for respective chirped Bragg grating lengths of 8 mm, 20 mm, 50 mm, 87 mm, and 90 mm using linear Gaussian apodization. The Q-factor results obtained using the proposed simulation model for single 10 Gb/s channel were respectively 51.14 dBm over 30 km at a grating length of 20 mm and 15.64 dBm over 150 km at 45 mm of grating length. Different eye-diagrams corresponding to varying grating lengths have also been presented for 10 Gb/s and 40 Gb/s at corresponding SMF lengths.
光时域复用（OTDM）技术有助于满足使用光传输来增加互联网流量容量和需求。高速光网络受到色散（CD）的严重影响，色散会在光探测器处导致脉冲展宽和码间干扰（ISI）。本文在OptiSystem 18中，使用高斯切趾线性啁啾光纤布拉格光栅、掺铒光纤放大器（EDFA）和均匀光纤布拉格光栅（UFBG）混合方法，对C波段运行的10 Gbps单模光纤（SMF）和40 Gbps OTDM上的色散补偿进行了对比分析。由四个UFBG和啁啾布拉格光栅组成的级联设计方法在品质因数和可实现的单模光纤长度方面改善甚微。使用线性高斯切趾法，对于8 mm、20 mm、50 mm、87 mm和90 mm的各自啁啾布拉格光栅长度，在1550 nm参考波长处获得了品质因数结果。使用所提出的仿真模型针对单个10 Gb/s通道获得的Q因子结果，在光栅长度为20 mm时，30 km上为51. dBm，在光栅长度为45 mm时，150 km上为15.64 dBm。还给出了对应于不同光栅长度的不同眼图，分别针对10 Gb/s和40 Gb/s以及相应的单模光纤长度。
