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SC-FDE for MMF short reach optical interconnects using directly modulated 850 nm VCSELs
Victor S C Teichmann1, Andre N Barreto, Tien-Thang Pham
1OCNLab, Department of Electrical Engineering, University of Brasilia, Brazil.
Optics Express
|November 29, 2012
Summary
Single-carrier frequency-domain equalization (SC-FDE) compensates modal dispersion in optical links. This method enables error-free 5 Gbps data transmission over 2443 meters of OM3 fiber, offering a cost-effective solution.
Area of Science:
- Optical communications
- Signal processing
Background:
- Modal dispersion in multimode fibers limits data rates in short-reach optical links.
- Vertical-Cavity Surface-Emitting Lasers (VCSELs) are commonly used in data center interconnects.
Purpose of the Study:
- To propose and evaluate single-carrier frequency-domain equalization (SC-FDE) for compensating modal dispersion.
- To demonstrate error-free data transmission in multimode fiber links.
Main Methods:
- Experimental data post-processing was used to apply SC-FDE.
- On-Off Keying (OOK) modulation at 5 Gbps was employed.
- Transmission over 2443 meters of OM3 fiber was tested.
Main Results:
- Error-free transmission of a 4 Mbit sequence was achieved with 7.9% overhead.
- Successful compensation of modal dispersion was demonstrated.
- The system operated at 5 Gbps over the specified fiber length.
Conclusions:
- SC-FDE is an effective technique for mitigating modal dispersion in multimode fiber links.
- The proposed method offers a low-cost alternative for data center and supercomputer interconnects.
- This approach supports high-speed optical communication over multimode fibers.
