Adaptive electro-optic equalization in low-power coherent-lite interconnects.

Area of Science:

• Optical communications
• Photonics
• Signal processing

Background:

• Short-reach interconnects face challenges with dispersion and power efficiency.
• Coherent modulation and detection offer high-speed data transmission.
• Existing equalizers may lack adaptability or efficiency.

Purpose of the Study:

• To propose and evaluate an adaptive electro-optic equalizer for short-reach optical interconnects.
• To enhance receiver power efficiency in coherent-lite systems.
• To compensate for linear dispersion in high-speed optical links.

Main Methods:

• Developed a two-component equalizer: an optical equalizer filter and an electronic controller.
• Implemented a random search algorithm for adaptive weight coefficient determination.
• Conducted extensive simulations on a 120 Gbaud homodyne coherent link.

Main Results:

• The proposed equalizer effectively compensates for linear channel dispersion.
• Simulations demonstrate promising performance in a 120 Gbaud coherent link.
• The adaptive nature allows for efficient weight coefficient adjustment.

Conclusions:

• The adaptive electro-optic equalizer significantly improves power efficiency in short-reach interconnects.
• This technology is suitable for coherent-lite applications.
• The random search algorithm provides effective adaptive control.