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First demonstration of a scalable MDM/CDM optical access system
Optics Express
|June 13, 2014
Summary
This study introduces a new hybrid optical network architecture combining mode and code division multiplexing for scalable access networks. It demonstrates a 2-mode, 4-code, 10 Gbps transmission over 42 km without dispersion compensation.
Area of Science:
- Optical Communications
- Photonics
- Telecommunications Engineering
Background:
- Traditional access networks face scalability challenges.
- Hybrid multiplexing techniques offer potential solutions for increased capacity.
Purpose of the Study:
- To present a novel hybrid all-optical architecture integrating mode-division multiplexing (MDM) and code-division multiplexing (CDM).
- To demonstrate the feasibility of this architecture for flexible and scalable optical access networks.
Main Methods:
- Implemented an asynchronous on-off keying modulation scheme.
- Utilized a multiport encoder/decoder for generating four phase-shift keyed optical codes at a single wavelength.
- Employed optical mode multiplexers/demultiplexers in the remote node and central office.
- Transmitted data over a 42-km link using single-mode and two-mode fibers without dispersion compensation.
Main Results:
- Successfully demonstrated a 2 mode x 4 code x 10 Gbps transmission.
- Achieved transmission over a 42-km fiber link without requiring dispersion compensation.
- Experimentally evaluated mode crosstalk tolerance for LP(01) and LP(11) modes across different access span distances.
Conclusions:
- The proposed hybrid MDM-CDM architecture is effective for flexible and scalable optical access networks.
- The system supports high-speed data transmission without dispersion compensation, simplifying network infrastructure.
- The architecture shows promising performance with acceptable mode crosstalk tolerance.
