Microwave photonics channelized receiver with high phase stability.

Area of Science:

• Photonics and Signal Processing
• Microwave Photonics
• Optical Frequency Combs

Background:

• Channelized receivers require stable phase relationships for large bandwidths.
• Conventional systems struggle with environmental sensitivity and phase instability.
• Extensive digital signal processing is often needed for phase information extraction.

Purpose of the Study:

• To propose a novel microwave photonics channelized receiver with high phase stability.
• To overcome limitations of conventional channelized receivers regarding environmental disturbances and phase acquisition.
• To demonstrate hardware-level phase stabilization using dual optical frequency combs.

Main Methods:

• Designed a microwave photonics channelized receiver utilizing dual optical frequency combs (OFCs).
• Engineered the system for identical phase jitter across all channels at the hardware level.
• Conducted experiments using dual-tone, broadband LFM, and QPSK signals to validate performance.

Main Results:

• Achieved root mean square phase jitter within 1.71 degrees across all channels.
• Successfully reconstructed broadband LFM and QPSK signals.
• Demonstrated stable side mode suppression ratios for LFM and stable constellation diagrams for QPSK signals.

Conclusions:

• The proposed dual OFC microwave photonics receiver offers high phase stability and immunity to environmental disturbances.
• This work represents the first hardware-level implementation and experimental demonstration of channelized reception and synthesis of a single broadband digital signal.
• The system provides a robust solution for phase-stabilized channelized reception of broadband signals, crucial for applications demanding large instantaneous bandwidth.