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Electronic polarization-division demultiplexing based on digital signal processing in intensity-modulation
Optics Express
|February 12, 2014
Summary
We developed a new optical receiver for dual-polarization intensity-modulation/direct-detection systems. This configuration electrically handles polarization tracking and demultiplexing using digital signal processing with minimal power loss.
Area of Science:
- Optical Communications
- Digital Signal Processing
- Photonics
Background:
- Intensity-Modulation/Direct-Detection (IM/DD) systems are widely used.
- Handling dual-polarization (DP) signals in IM/DD systems electrically presents challenges.
Purpose of the Study:
- To propose a novel optical receiver configuration for IM/DD systems.
- To enable electrical processing of dual-polarization optical signals.
Main Methods:
- Utilized a Stokes analyzer for polarization state analysis.
- Developed a novel digital signal-processing (DSP) algorithm.
- Implemented polarization tracking and demultiplexing in the digital domain post-direct detection.
Main Results:
- The proposed configuration successfully processes dual-polarization signals electrically.
- Digital polarization manipulations resulted in a negligibly small power penalty.
- Achieved effective polarization tracking and demultiplexing after direct detection.
Conclusions:
- The novel optical receiver configuration offers an efficient way to handle DP-IM/DD signals.
- Digital domain processing of polarization states is feasible with minimal performance degradation.
- This approach advances the capabilities of direct-detection optical communication systems.
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