ITU-T Rec. G.975.1 (02/2004) Forward error correction for high bit-rate DWDM submarine systems

Investigation of Differently Modulated Optical Signals Transmission in HDWDM Systems

The authors’ developed combined system model can be considered under the concept of next generation optical network (NGON) as a model for the future design of backbone networks. Such solution can be topical in the result of different telecom operators’ optical networks convergence. In this case a necessity to transmit differently modulated signals over a single optical fiber even with different...

ITU-T Rec. Series G Supplement 39 (02/2006) Optical system design and engineering considerations

This Supplement provides information on the background and methodologies used in the development of optical interface Recommendations such as ITU-T Recs G.957, G.691, and G.959.1. This revision: clarifies BER measurements for FEC enabled systems; clarifies the mode partition noise penalty equation in 9.2.1.1; incorporates information on the statistics of the attenuation of installed links; adds...

ITU-T Rec. Series G Supplement 42 (02/2011) Guide on the use of the ITU-T Recommendations related to optical fibres and systems technology

The Challenges of Data Transmission toward Tbps Line rate in DWDM System for Long haul Transmission

Nowadays, Dense Wavelength Division Multiplexing (DWDM) has become a key component of the world’s communications infrastructure. The significant improvement in high-speed electronics and optical components, and multi-level modulation formants and coherent receiver technology has enabled high rate data transmission. DWDM promises to increase the bandwidth per fiber as the bit rate and the number...

Effects of ASE noise and dispersion chromatic on performance of DWDM networks using distributed Raman amplifiers

We investigate effects of amplified spontaneous emission noise (ASE), noise figure (NF) and dispersion chromatic on the performance of DWDM networks using distributed optical fiber Raman amplifiers (DRAs) in two different pump configurations, i.e., forward and backward pumping. We found that the pumping configurations, ASE noise, and dispersion play an important role in network performance impr...