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External cavity modes of semiconductor lasers with phase-conjugate feedback
Thomas Erneux1, Athanasios Gavrielides, Kirk Green
1Université Libre de Bruxelles, Optique Nonlinéaire Théorique, Campus Plaine, C.P. 231, 1050 Bruxelles, Belgium.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 3, 2004
Summary
This study defines external cavity modes (ECMs) in semiconductor lasers with phase-conjugate feedback. Researchers developed an analytical approximation for these pulsating laser modes, validating it with numerical simulations.
Area of Science:
- Physics
- Optics
- Laser Technology
Background:
- Semiconductor lasers are crucial in modern optics.
- Phase-conjugate feedback can alter laser dynamics.
- External cavity modes (ECMs) are specific pulsating solutions.
Purpose of the Study:
- To define and analyze external cavity modes (ECMs) in semiconductor lasers with phase-conjugate feedback.
- To develop a simple analytical approximation for ECMs.
- To validate the approximation against numerical simulations.
Main Methods:
- Definition of ECMs as time-periodic pulsating intensity solutions.
- Construction of a simple analytical approximation for ECMs.
- Numerical simulations and continuation techniques to generate bifurcation diagrams.
- Comparison of analytical results with numerical simulations.
Main Results:
- ECMs appear as stable attractors with increasing feedback rates.
- An analytical approximation for ECM frequencies was constructed.
- Branches of ECMs were found to be isolated.
- The analytical approximation showed good agreement with numerical results.
Conclusions:
- The study provides a method for approximating ECMs in semiconductor lasers.
- The findings contribute to understanding laser dynamics under phase-conjugate feedback.
- The validated approximation can aid in laser design and analysis.