4 × 10 Gbps WDM repeaterless transmission system using asymmetrical dispersion compensation for rural area applications
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We demonstrate experimentally 4 × 10 Gbps wavelength division multiplexing repeaterless transmission system using non-return-to-zero differential phase-shift keying modulation format over 300-km standard single-mode fiber. The channels used were 1546.9, 1547.7, 1548.51 and 1549.2 nm with 100 GHz spacing. In this system design, a dispersion compensation module is used; multi-channel-chirped fiber Bragg grating was deployed with asymmetrical configuration with different compositions of dispersion values at the transmitting and the receiving sides. The transmission system was pumped bidirectionally with 1445 and 1455 nm wavelength in a forward direction, and three pump wavelengths of 1430, 1440 and 1450 nm are deployed for the backward direction. The total on–off Raman gain is 47 dB from total pump power of 1.862 W. The result for dispersion pre-compensation of − 2006.0 and − 2338.3 ps/nm has minimal effect on nonlinearity showing the best performance for 300-km repeaterless transmission system.
KeywordsRepeaterless NRZ-DPSK Dispersion compensation module Multi-channel-chirped fiber Bragg grating Asymmetrical dispersion compensation
This research was supported by Telekom Malaysia Berhad (TM), and NATP, TM and TM Research & Development Sdn. Bhd. (TMR&D) under the Grant nos. RDTC/110782 and RDTC/140859. We would like to thank our colleagues, Repeaterless team, Project Manager Mr. Sundhar Subramaniam, TMRND for the passion and great work that assisted this research. The author would like to thank Dr. Nizam Tamcheck for the academic advices and expertise throughout the completion of the manuscript.
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