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Optical link encoding based simultaneous correction for crosstalk and nonlinearity in multi-site optical converged
Optics Express
|November 29, 2023
Summary
This study introduces a novel correction scheme for optical networks, significantly improving signal quality by mitigating modulation nonlinearity and crosstalk. The method enhances signal-to-noise ratio (SNR) by over 22 dB without added hardware complexity.
Area of Science:
- Optical Communications
- Signal Processing
- Network Engineering
Background:
- Multi-site optical converged networks face challenges from modulation nonlinearity and optical switch crosstalk.
- These impairments degrade signal quality and network performance.
Purpose of the Study:
- To develop and demonstrate a correction scheme for simultaneously addressing modulation nonlinearity and optical switch crosstalk.
- To validate the effectiveness of the proposed scheme in complex optical network environments.
Main Methods:
- Utilizing optical link encoding and exclusive-or operations on received signals to identify spectrum usage amidst interference.
- Implementing a proof-of-concept experiment with linear frequency modulated (LFM) waveforms and quadrature amplitude modulation (QAM) signals.
Main Results:
- Achieved an improved signal-to-noise ratio (SNR) exceeding 22 dB compared to uncorrected signals.
- Demonstrated a superior SNR, outperforming single-impairment correction by at least 15.9 dB.
- Ensured the correction process introduces no additional noise, aligning results with ideal scenarios.
Conclusions:
- The proposed scheme effectively corrects for modulation nonlinearity and crosstalk in optical networks.
- It offers a hardware-complexity-free solution for large-scale optical networks with multiple optoelectronic devices.
- This technique enhances overall network performance and signal integrity.
