研究目的
To propose a novel architecture and extension strategy for the National Optical Fiber Network (NOFN) in India to utilize the Long (L)-band for transmission, thereby doubling the total fiber capacity and achieving cost efficiency.
研究成果
The novel architecture and extension strategy successfully demonstrate transmission over both C and L-bands for the existing NOFN, doubling the total fiber capacity without deploying new fibers. This approach is also applicable to future deployments over Elastic Optical Networks (EON) with higher super channel count and advanced modulation formats.
研究不足
The implementation of L-band requires minor hardware changes such as C/L-band Mux/Demux and a separate amplifier for each band. The study is based on simulation and a pilot route, necessitating further real-world deployment and testing.
1：Experimental Design and Method Selection:
The study proposes a novel architecture for NOFN to extend transmission to the L-band alongside the existing C-band, requiring minimal hardware changes.
2：Sample Selection and Data Sources:
A pilot route between Delhi and Bombay in the existing NOFN by RaiTel was selected for demonstration.
3：List of Experimental Equipment and Materials:
C/L band Mux-Demux and separate amplifiers for each band were used.
4：Experimental Procedures and Operational Workflow:
The extension strategy involved adding 40 channels in the L-band to the existing 40 channels in the C-band, maintaining a guard band of 300GHz between bands to avoid interband crosstalk.
5：Data Analysis Methods:
The evaluation version of OptiSystem simulation tool was used for the study, with the eye diagram of the worst channel analyzed to demonstrate successful transmission.
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