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Symmetric Terabit WDM Pre-DFT OFDM access network using PCF-supercontinuum
Bo Liu1, Lijia Zhang, Xiangjun Xin
1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Optics Express
|November 29, 2012
Summary
We developed a novel terabit access network using pre-DFT OFDM and a single supercontinuum source. This design supports high-speed, cost-effective optical networks with many users.
Area of Science:
- Optoelectronics
- Optical Communications
- Fiber Optics
Background:
- Terabit access networks are crucial for future high-speed internet.
- Existing solutions face challenges with cost, complexity, and scalability.
- Nonlinearity in optical fibers impacts signal integrity in high-capacity systems.
Purpose of the Study:
- To propose a novel Wavelength Division Multiplexing (WDM) Terabit access network.
- To achieve high-speed, cost-effective, and reliable optical access.
- To mitigate fiber nonlinearity in Orthogonal Frequency Division Multiplexing (OFDM) signals.
Main Methods:
- Utilizing pre-DFT OFDM modulation.
- Employing a single Photonic Crystal Fiber (PCF) supercontinuum (SC) light source.
- Implementing a shared SC source for multiple Optical Network Units (ONUs).
Main Results:
- Demonstrated a 2.5 THz wide frequency comb.
- Achieved symmetric 2.56 Tb/s WDM pre-DFT OFDM access over 60 km.
- Supported 1600 ONUs with a single SC source, enabling duplex access with source-free ONUs.
Conclusions:
- The proposed architecture offers a promising solution for future terabit optical metro/access networks.
- The integration of pre-DFT OFDM and a shared SC source enhances network reliability and reduces cost.
- This approach simplifies network configuration while supporting a large number of users.
