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Dynamics-dependent synchronization in on-chip coupled semiconductor lasers
Shoma Ohara1, Andreas Karsaklian Dal Bosco1, Kazusa Ugajin1
1Department of Information and Computer Sciences, Saitama University, 255 Shimo-Okubo Sakura-ku, Saitama City, Saitama 338-8570, Japan.
Physical Review. E
|January 20, 2018
Summary
Two coupled semiconductor lasers exhibit dynamics-dependent synchronization, changing from in-phase to antiphase based on signal filtering and laser behavior. This highlights the influence of nonlinear dynamics on synchronization properties.
Area of Science:
- Optoelectronics
- Nonlinear Dynamics
- Photonics
Background:
- Semiconductor lasers are crucial for optical communications.
- Understanding laser synchronization is key to advanced photonic systems.
- Optical feedback and coupling influence laser dynamics.
Purpose of the Study:
- Investigate synchronization properties of mutually coupled semiconductor lasers.
- Analyze synchronization based on dynamical content and frequency range.
- Identify and define 'dynamics-dependent synchronization'.
Main Methods:
- Studied chaotic dynamics in a photonic integrated circuit with two coupled semiconductor lasers.
- Employed optical feedback and analyzed synchronization phenomena.
- Examined signal filtering effects (low-pass) on synchronization states.
Main Results:
- Identified dynamics-dependent synchronization, where properties vary with frequency and nonlinear dynamics.
- Observed in-phase synchronization for original signals and antiphase synchronization for filtered signals.
- Demonstrated that laser dynamics (chaotic vs. low-frequency fluctuations) dictate synchronization type.
Conclusions:
- Synchronization in coupled lasers is highly dependent on their underlying dynamics and analysis frequency.
- Asymmetric coupling strength and injection currents are critical parameters controlling synchronization states.
- Dynamics-dependent synchronization offers new insights into complex laser interactions.
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