Abstract
A 40 Gb/s high speed optical transmission system is designed, and the different dispersion compensation schemes are adopted to realize the transmission of the optical duo-binary (ODB) signals over 120 km optical fiber. Optical duo-binary signals are generated by using a precoder, two low- pass filters (LPF) and one mach-zehnder modulator (MZM). Through combination of dispersion compensation fiber (DCF) and single mode fiber (SMF) in the transmission link, four different dispersion compensation schemes (pre-compensation, post-compensation and hybrid compensation (pre+ post) and hybrid compensation (post+ pre)) were compared. Analyzing Q factor, BER, eye diagrams and receiver sensitivity in several dispersion compensation schemes, the simulation results are: the cut-off frequency of LPF affects the transmission performance, and the hybrid compensation (post+ pre) scheme is the optimal dispersion compensation method.
Highlights
The two development directions of optical fiber transmission system are high speed and long span, and the attenuation and dispersion have effects on optical signals transmission [1]
Optisystem 13 is used to simulate a rate of 40 GB/s dispersion compensation fiber optical transmission system
A 40 Gbit/s high speed optical fiber transmission system with different dispersion compensation schemes is proposed in this paper, which based on lowpass filters (LPF)-optical duo-binary (ODB) coded modulation and combinations of dispersion compensation fiber (DCF), single mode fiber (SMF) and EDFA
Summary
The two development directions of optical fiber transmission system are high speed and long span, and the attenuation and dispersion have effects on optical signals transmission [1]. The dispersion of SMF has reached 16 PS/nm·km, the distance of 40 Gbit/s signal can only be transmitted to 4 km without using dispersion compensation techniques [2]. In order to increase the dispersion tolerance, extend the repeating distance and improve the spectrum efficiency, the optical duo-binary (ODB) coding has been used. ODB modulation format has some advantages like high dispersion tolerance, high spectrum efficiency and high anti-nonlinear ability in high-speed optical fiber communication system. (2016) Research on Dispersion Compensation of 40 GB/s Optical Duo-Binary Coded Transmission System. Optical duo-binary signals are generated using low pass filter (LPF-ODB) is proposed. In order to compensating dispersion, four kinds of dispersion compensation schemes are designed and compared
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