Practical implementation of a high-speed multichannel correlator with fiber-optic delays

Area of Science:

• Physics
• Electrical Engineering
• Signal Processing

Background:

• Digital correlators are essential for signal analysis.
• High time resolution is crucial for precise measurements.

Purpose of the Study:

• To describe the architecture, subsystems, and applications of a novel multichannel digital correlator.
• To detail the system's operational capabilities and flexibility.

Main Methods:

• Construction of a multichannel digital correlator using combined optical and electrical delays.
• Implementation of a derandomizer for enhanced time resolution.
• Utilization of switchable delay lines for variable channel access.

Main Results:

• Achieved 1-ns bin width in normal operation with derandomizer.
• Achieved 0.25-ns bin width when derandomizer is bypassed.
• Configurable system provides up to 160 channels at 1-ns or 640 channels at 0.25-ns bin width.

Conclusions:

• The developed multichannel digital correlator offers high flexibility and time resolution.
• The hybrid delay system enables diverse applications requiring precise signal correlation.