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Updated: Feb 6, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
17.5K
Tunable 360° microwave photonic multichannel phase shifter with frequency quadrupling.
Applied Optics
|August 18, 2018
Summary
A novel photonic scheme generates a frequency-quadrupled microwave signal with a full 360° tunable phase shift. This method offers a simple structure and broad bandwidth for advanced microwave signal generation.
Area of Science:
- Photonics
- Optical Engineering
- Microwave Engineering
Background:
- Microwave signal generation with tunable phase is crucial for advanced communication systems.
- Existing methods often face limitations in phase tunability and complexity.
Purpose of the Study:
- To propose and demonstrate a photonic scheme for generating frequency-quadrupled microwave signals.
- To achieve a full-range 360° tunable phase shift for these signals.
Main Methods:
- Utilizing a dual-parallel Mach-Zehnder modulator to generate suppressed carrier sidebands.
- Employing a fiber Bragg grating and Faraday rotating mirror for orthogonal polarization.
- Beating the optical sidebands on a photodetector to obtain the frequency-quadrupled RF signal.
Main Results:
- Successfully generated frequency-quadrupled microwave signals at 12 GHz and 16 GHz.
- Demonstrated a continuous phase shift from 0° to 360° for the 12 GHz signal.
- Verified the scheme's capability for independent and arbitrary phase adjustment.
Conclusions:
- The proposed photonic scheme provides a robust method for generating frequency-quadrupled microwave signals with full-range phase tunability.
- The scheme offers a simple structure, large operation bandwidth, and potential for multi-channel applications.
- This technique advances microwave signal generation for applications requiring precise phase control.
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