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Dynamics of two semiconductor lasers coupled by a passive resonator
H Erzgräber1, S Wieczorek, B Krauskopf
1College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 28, 2010
Summary
This study analyzes the stability of coupled semiconductor lasers. Laser locking regions and chaotic dynamics are identified, influenced by resonator length and coupling.
Area of Science:
- Optics and Photonics
- Nonlinear Dynamics
- Semiconductor Lasers
Background:
- Semiconductor lasers are crucial for various applications.
- Understanding their stability and dynamics is essential for device design.
- Coupled laser systems exhibit complex behaviors.
Purpose of the Study:
- To analyze the stability of two spatially separated semiconductor lasers.
- To investigate nonlinear interactions within a composite-cavity mode approach.
- To identify laser locking regions and chaotic dynamics.
Main Methods:
- Utilized the composite-cavity mode approach.
- Performed bifurcation analysis to study parameter dependencies.
- Applied the 0-1 test for chaos to detect complex dynamics.
Main Results:
- Identified in-phase and out-of-phase laser locking regions.
- Found that locking region structure depends on passive resonator length and amplitude-phase coupling.
- Observed up to three locking regions when the passive resonator is shorter than the lasers.
- Uncovered chaotic dynamics that diminish with comparable resonator and laser lengths.
Conclusions:
- The length of the passive resonator significantly impacts semiconductor laser locking.
- Chaotic dynamics in these systems can be controlled by adjusting resonator length.
- The composite-cavity mode approach provides insights into coupled laser stability.
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