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Tunable dual frequency optoelectronic oscillator with low intermodulation based on dual-parallel Mach-Zehnder
Optics Express
|January 7, 2017
Summary
A novel tunable dual-frequency optoelectronic oscillator (OEO) was developed using a dual-parallel Mach-Zehnder modulator (DPMZM) to suppress intermodulation. This system achieves tunable dual-frequency operation from 1 GHz to 15 GHz.
Area of Science:
- Photonics
- Optoelectronics
- Microwave Engineering
Background:
- Optoelectronic oscillators (OEOs) are crucial for generating stable microwave signals.
- Achieving tunable dual-frequency operation with suppressed intermodulation in OEOs presents a significant challenge.
Purpose of the Study:
- To propose and experimentally demonstrate a tunable dual-frequency optoelectronic oscillator (TDF-OEO) with low intermodulation.
- To investigate the tuning range and limitations of the proposed TDF-OEO system.
Main Methods:
- Utilizing a dual-parallel Mach-Zehnder modulator (DPMZM) to modulate two selected oscillation modes.
- Employing two tunable electronic band-pass filters to select specific oscillation frequencies.
- Optimizing DPMZM bias conditions to minimize intermodulation distortion.
Main Results:
- Successful experimental demonstration of a TDF-OEO.
- Achieved a wide tuning range from 1 GHz to 15 GHz.
- Verified suppression of intermodulation components through proper bias control.
Conclusions:
- The proposed DPMZM-based TDF-OEO offers a viable solution for generating tunable dual-frequency signals with low intermodulation.
- The system's tuning range and limitations were experimentally validated, providing insights for future designs.
