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2004•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access

Reduced sensitivity to external feedback in quantum dot lasers

G. Huyet, D. O’Brien, Stephen P. Hegarty, John G. McInerney, D. Bimberg, C. Ribbat, V. M. Ustinov, S. S. Mikhrin, A. R. Kovsh, Alexander V. Uskov

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Abstract

We analyse the sensitivity of quantum dot semiconductor lasers to optical. While bulk and quantum well semiconductor lasers are usually extremely unstable when submitted to back reflection, quantum dot semiconductor lasers exhibit a reduced sensitivity. Using a rate equation approach, we show that this behaviour is the result of a relatively low but nonzero line-width enhancement factor and of strongly damped relaxation oscillations.

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What this paper is about

We analyse the sensitivity of quantum dot semiconductor lasers to optical. While bulk and quantum well semiconductor lasers are usually extremely unstable when submitted to back reflection, quantum dot semiconductor lasers exhibit a reduced sensitivity. Using a rate equation approach, we show that this behaviour is the result of a relatively low but nonzero line-width enhancement factor and of strongly damped relaxation oscillations.

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Available abstract

We analyse the sensitivity of quantum dot semiconductor lasers to optical. While bulk and quantum well semiconductor lasers are usually extremely unstable when submitted to back reflection, quantum dot semiconductor lasers exhibit a reduced sensitivity. Using a rate equation approach, we show that this behaviour is the result of a relatively low but nonzero line-width enhancement factor and of strongly damped relaxation oscillations.

Key concepts: Quantum dot laser, Semiconductor laser theory, Laser, Quantum dot, Semiconductor, Sensitivity (control systems), Physics, Quantum well

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