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Low-cost coherent receiver for long-reach optical access network using single-ended detection
Optics Letters
|October 15, 2015
Summary
A novel low-cost coherent receiver for optical access networks effectively detects polarization components and cancels interference using minimal photodiodes. This technology shows promising results for high-speed data transmission.
Area of Science:
- Optical Communications
- Photonics Engineering
- Signal Processing
Background:
- Long-reach optical access networks require cost-effective and high-performance coherent receivers.
- Polarization Division Multiplexing (PDM) is crucial for increasing data capacity.
- Signal-to-Signal Beat Interference (SSBI) is a significant challenge in coherent detection.
Purpose of the Study:
- To propose and evaluate a low-cost coherent receiver architecture.
- To enable efficient detection of PDM signals in optical networks.
- To achieve SSBI cancellation using a simplified receiver design.
Main Methods:
- Utilizing two 2x3 optical hybrids for signal splitting.
- Implementing single-ended detection with three photodiodes.
- Employing digital signal processing for polarization de-multiplexing and SSBI cancellation.
Main Results:
- The proposed receiver successfully detects both polarization components of PDM signals.
- Polarization de-multiplexing and SSBI cancellation were achieved with only three photodiodes.
- Simulations for 40 Gb/s PDM-OFDM transmissions showed a minimal 3.2 dB OSNR penalty compared to theory.
Conclusions:
- The developed low-cost coherent receiver is suitable for long-reach optical access networks.
- The architecture offers a simplified and cost-effective solution for PDM signal processing.
- Further optimization may reduce the observed OSNR difference for enhanced performance.
