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Enhanced monolithically integrated coherent 120° downconverter with high fabrication yield
P J Reyes-Iglesias1, A Ortega-Moñux, I Molina-Fernández
1Departamento Ingeniería de Comunicaciones, ETSI Telecomunicación, Universidad de Málaga 29071 Málaga, Spain. reyes@ic.uma.es
Optics Express
|November 29, 2012
Summary
A new 120° downconverter design overcomes distortion issues found in conventional 90° designs. This advanced integrated circuit offers improved signal range and better manufacturing success rates, even with fabrication errors.
Area of Science:
- Electrical Engineering
- Photonics
- Signal Processing
Background:
- Conventional 90° monolithically integrated downconverters exhibit hardware-induced non-linear constellation distortion.
- This distortion is exacerbated by deviations from the central wavelength and fabrication imperfections.
Purpose of the Study:
- To propose and numerically demonstrate a 120° monolithically integrated downconverter design.
- To achieve full compensation for hardware non-idealities in integrated downconverters.
Main Methods:
- Numerical simulation of a 120° integrated downconverter architecture.
- Analysis under realistic conditions including fabrication tolerances and limited analog-to-digital converter (ADC) resolution.
Main Results:
- The proposed 120° downconverter demonstrates significantly improved signal dynamic range compared to conventional designs.
- The approach shows a remarkable improvement in fabrication yield, even with process variations.
Conclusions:
- The 120° integrated downconverter effectively compensates for hardware non-idealities.
- This design offers a robust solution for high-performance integrated downconversion, enhancing reliability and yield.
