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Article
Open AccessBeam sha** in high-power broad-area quantum cascade lasers using optical feedback
Broad-area quantum cascade lasers with high output powers are highly desirable sources for various applications including infrared countermeasures. However, such structures suffer from strongly deteriorated be...
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Chapter
Introduction
This introduction chapter will present the general context of this study, i.e. the applications at mid-infrared wavelengths and the existing sources. The organization of the dissertation will furthermore be de...
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Chapter
Conclusions and Perspectives
The studies presented in this thesis have shown that QCLs are sensitive to external perturbations such as optical feedback. As in interband lasers, depending on the external cavity length and the feedback rati...
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Chapter
Quantum Cascade Lasers: High Performance Mid-infrared Sources
This chapter will present the principle of operation and theory of QCLs. The \(\alpha \) ...
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Chapter
Impact of Optical Feedback on Quantum Cascade Lasers
In quantum cascade lasers, there have been very few comprehensive studies on optical feedback. In this chapter,we propose to study both experimentally and numerically the impact of optical feedback on the stat...
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Chapter
Impact of Optical Injection on Quantum Cascade Lasers
After a brief review of the effects of optical injection on a laser diode both in and outside the locking range, this chapter will present a overview of the state of the art on optical injection in QCLs, as we...
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Chapter
Optical Feedback in Interband Lasers
Optical feedback consists in reinjecting part of the emitted light of a laser into the laser cavity. This phenomenon can originate from parasitic reflections in the experimental setups, either on an optical co...
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Chapter
Beam Sha** in Broad-Area Quantum Cascade Lasers Using Optical Feedback
In this chapter, conventional and spatially-filtered optical feedback will be applied to a 32 \(\upmu \mathrm {m}\) ...
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Article
Open AccessChaotic light at mid-infrared wavelength
The onset of nonlinear dynamics and chaos is evidenced in a mid-infrared distributed feedback quantum cascade laser both in the temporal and frequency domains. As opposed to the commonly observed route to chao...
