Time-domain convolution model for studying oscillation dynamics in an injection-locked optoelectronic oscillator

Area of Science:

• Optoelectronics
• Nonlinear Dynamics
• Signal Processing

Background:

• Optoelectronic oscillators (OEOs) are crucial for high-frequency signal generation.
• Understanding oscillation dynamics in injection-locked OEOs is complex.
• Existing models may not fully capture phenomena like asymmetrical spectrum generation.

Purpose of the Study:

• To propose a novel time-domain convolution model for OEOs.
• To simulate and analyze oscillation dynamics in injection-locked OEOs.
• To validate the model against experimental results.

Main Methods:

• Development of a time-domain convolution model.
• Numerical simulation of injection locking, frequency pulling, and spectrum generation.
• Comparison of simulation outcomes with experimental data.

Main Results:

• The model successfully simulates OEO oscillation characteristics like spectrum and phase noise.
• Simulated phenomena include injection locking, frequency pulling, and asymmetrical spectrum generation.
• Observed alternating sideband appearance during asymmetrical spectrum generation for the first time.

Conclusions:

• The proposed time-domain convolution model accurately describes injection-locked OEO dynamics.
• The model provides a powerful tool for studying OEO oscillation.
• The findings advance the understanding of asymmetrical spectrum generation in OEOs.