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Multifunctional microwave photonic processor based on Brillouin selective sideband amplification and carrier phase
Applied Optics
|March 17, 2026
Summary
This study introduces a microwave photonic signal processor using Brillouin scattering for selective amplification and phase shifting. It achieves simultaneous filtering and phase control, enhancing microwave signal processing capabilities.
Area of Science:
- Photonics
- Microwave Engineering
- Signal Processing
Background:
- Microwave photonic signal processors are crucial for advanced communication systems.
- Existing processors face limitations in simultaneous filtering and phase shifting capabilities.
Purpose of the Study:
- To propose and demonstrate a multifunctional microwave photonic signal processor.
- To achieve simultaneous filtering and phase shifting of microwave signals.
Main Methods:
- Utilizing stimulated Brillouin scattering (SBS) for selective amplification of carrier-suppressed single-sideband (CS-SSB) signals.
- Employing dual-parallel Mach-Zehnder modulators (DPMZMs) for signal generation and carrier phase manipulation.
- Integrating an electro-optic frequency shifter for filter tuning.
Main Results:
- Achieved a suppression ratio exceeding 32 dB and a 3 dB bandwidth below 90.5 MHz.
- Demonstrated full-range (0°-360°) phase shifting independent of filtering.
- Extended the frequency tuning range up to 20 GHz.
- Reduced third-order intermodulation distortion (IMD3) by 10.8 dB.
Conclusions:
- The proposed processor enables simultaneous, independent filtering and phase shifting of microwave signals.
- The demonstrated technology overcomes bandwidth limitations and improves signal quality.
- This multifunctional processor offers significant advancements for microwave photonics applications.
