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Updated: Aug 15, 2025
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Stability improvement of a dual-loop optoelectronic oscillator based on self-phase locking
Applied Optics
|January 6, 2023
Summary
This study introduces a novel dual-loop optoelectronic oscillator (OEO) with a self-phase locking loop (SPLL) to enhance frequency stability. The SPLL improves phase noise and reduces frequency fluctuations without external references, promising for integrated OEOs.
Area of Science:
- Photonics
- Electrical Engineering
- Signal Processing
Background:
- Optoelectronic oscillators (OEOs) are crucial for high-frequency signal generation.
- Achieving superior frequency stability in OEOs remains a significant challenge.
- Existing stabilization methods often require complex external reference sources.
Purpose of the Study:
- To introduce and experimentally validate a novel dual-loop optoelectronic oscillator (OEO).
- To demonstrate a self-phase locking loop (SPLL) for intrinsic frequency stabilization.
- To improve the frequency stability of OEOs without external references.
Main Methods:
- Implementation of a dual-loop OEO architecture.
- Integration of a self-phase locking loop (SPLL) utilizing a Mach-Zehnder modulator.
- Experimental validation at a 10-GHz operating frequency.
Main Results:
- Achieved over 20 dB improvement in phase noise at low offset frequencies.
- Reduced frequency fluctuation to less than 4 kHz within an hour.
- Decreased Allan deviation by one order of magnitude.
Conclusions:
- The SPLL effectively enhances the frequency stability of OEOs.
- The proposed scheme offers a promising solution for integrated OEOs.
- Eliminates the need for external frequency reference sources.
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