Temporal point-by-point arbitrary waveform synthesis beyond tera sample per second.

Area of Science:

• Photonics and Optical Engineering
• Signal Processing
• Information Technology

Background:

• Arbitrary waveform synthesizers are crucial for modern information technology.
• Current electronic synthesizers are limited to hundreds of GSa/s due to analog-to-digital converter speeds.
• Photonic approaches promise higher speeds but face scalability and reconfigurability challenges.

Purpose of the Study:

• To propose and demonstrate a novel arbitrary waveform synthesizer operating beyond TSa/s.
• To overcome the speed limitations of existing electronic arbitrary waveform synthesizers.
• To leverage photonic principles for enhanced waveform generation capabilities.

Main Methods:

• Developed a temporal point-by-point arbitrary waveform synthesizer utilizing an optical temporal Vernier caliper.
• Employed a mode-locked laser and a fiber loop configuration.
• Controlled waveform sampling rate by exploiting detuning between pulse period and fiber loop round-trip delay.

Main Results:

• Demonstrated ultra-high, tunable sampling rates up to 1 TSa/s, an order of magnitude beyond current electronic systems.
• Achieved a memory depth of up to 10.4 kilo-points.
• Successfully generated communication waveforms for high-speed wireless communications and linearly chirped microwave waveforms for high-resolution multi-target detection.

Conclusions:

• The proposed photonic arbitrary waveform synthesizer surpasses the speed limitations of electronic counterparts.
• The system offers high sampling rates and significant memory depth, enabling advanced applications.
• This technology represents a significant advancement in waveform generation for high-speed communications and sensing.