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Distributed Raman amplification in a 8 x 10-Gb/s, 40-km, 1:128 TWDM PON
Optics Express
|November 10, 2016
Summary
This study shows distributed Raman amplification works for wavelength division multiplexing passive optical networks (WDM-PON). The system achieved significant gains for 80 Gb/s capacity over 42 km, proving its viability.
Area of Science:
- Telecommunications Engineering
- Optical Communications
- Photonics
Background:
- Passive Optical Networks (PONs) are crucial for fiber-to-the-home deployments.
- Increasing demand for higher bandwidth necessitates advanced amplification techniques in PONs.
- Time and Wavelength Division Multiplexing (TWDM) PONs offer higher capacity by utilizing multiple wavelengths.
Purpose of the Study:
- To demonstrate distributed Raman amplification (DRA) compatible with TWDM PON standards.
- To evaluate the performance of DRA in a TWDM PON system with specific ITU-defined parameters.
- To assess the impact of feeder length on Raman gain and system performance.
Main Methods:
- Implemented distributed Raman amplification within an 8-wavelength TWDM PON.
- Configured the system for 80-Gb/s symmetric downstream and upstream capacity.
- Tested the system with a 1:128 split ratio over 42-km, 21-km, and 10-km feeder lengths.
Main Results:
- Achieved a downstream Raman gain of 9.8 dB and an upstream gain of 8.6 dB for the 42-km TWDM PON.
- Demonstrated system performance across different feeder lengths (42 km, 21 km, 10 km).
- Confirmed compatibility with ITU specifications for TWDM PON wavelength plans and rates.
Conclusions:
- Distributed Raman amplification is a viable technology for enhancing TWDM PON performance.
- The demonstrated system meets the requirements for high-capacity fiber optic access networks.
- Raman amplification effectively supports high split ratios and extended reach in TWDM PONs.
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