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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Photonic microwave waveforms generation based on time-domain processing.

Yang Jiang, Chuang Ma, Guangfu Bai

|September 15, 2015

Summary

This summary is machine-generated.

A novel photonic microwave waveform generator uses optical pulse carving and overlapping to create various waveforms. This method successfully generated square, triangular, and sawtooth waveforms, demonstrating its versatility.

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Area of Science:

Photonics
Microwave Engineering
Signal Processing

Background:

Traditional microwave waveform generation methods face limitations in flexibility and precision.
Photonic approaches offer potential for high-frequency signal generation and processing.
Time-domain synthesis provides a flexible framework for waveform design.

Purpose of the Study:

To propose and experimentally demonstrate a new photonic approach for microwave waveform generation.
To utilize time-domain synthesis for creating diverse microwave waveforms.
To investigate the capabilities of optical pulse carving and envelope overlapping for waveform generation.

Main Methods:

Employed two single-drive Mach-Zehnder modulators biased at the quadrature point as optical pulse carvers.
Implemented a time-domain synthesis technique involving carving and overlapping optical field envelopes.
Conducted theoretical analysis, simulation, and experimental validation of the proposed method.

Main Results:

Successfully generated a square waveform with a 50% duty cycle.
Generated a triangular waveform with a full duty cycle.
Produced sawtooth (and reversed-sawtooth) waveforms with a 50% duty cycle, and a frequency-doubling sawtooth waveform with a full duty cycle.

Conclusions:

The proposed photonic approach based on time-domain synthesis is effective for generating various microwave waveforms.
The experimental demonstration validates the theoretical analysis and simulation results.
This technique offers a flexible and promising method for future microwave signal generation.