Fabrication of Distributed Feedback Quantum Cascade Lasers
Author | : Anthony Matlis |
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Release | : 2001 |
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Author | : Anthony Matlis |
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Release | : 2001 |
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Author | : Werner Schrenk |
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Total Pages | : 232 |
Release | : 2001 |
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Author | : Jérôme Faist |
Publisher | : Oxford University Press |
Total Pages | : 321 |
Release | : 2013-03-14 |
Genre | : Science |
ISBN | : 0198528248 |
This book describes the physics, fabrication technology, and applications of the quantum cascade laser.
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In this Letter, we report the tuning of the emission wavelength of a single mode distributed feedback quantum cascade laser by modifying the mode effective refractive index using fluids. A fabrication procedure to encapsulate the devices in polymers for microfluidic delivery is also presented. The integration of microfluidics with semiconductor laser (optofluidics) is promising for new compact and portable lab-on-a-chip applications.
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Author | : Louise Jumpertz |
Publisher | : Springer |
Total Pages | : 152 |
Release | : 2017-08-31 |
Genre | : Science |
ISBN | : 3319658794 |
This thesis presents the first comprehensive analysis of quantum cascade laser nonlinear dynamics and includes the first observation of a temporal chaotic behavior in quantum cascade lasers. It also provides the first analysis of optical instabilities in the mid-infrared range. Mid-infrared quantum cascade lasers are unipolar semiconductor lasers, which have become widely used in applications such as gas spectroscopy, free-space communications or optical countermeasures. Applying external perturbations such as optical feedback or optical injection leads to a strong modification of the quantum cascade laser properties. Optical feedback impacts the static properties of mid-infrared Fabry–Perot and distributed feedback quantum cascade lasers, inducing power increase; threshold reduction; modification of the optical spectrum, which can become either single- or multimode; and enhanced beam quality in broad-area transverse multimode lasers. It also leads to a different dynamical behavior, and a quantum cascade laser subject to optical feedback can oscillate periodically or even become chaotic. A quantum cascade laser under external control could therefore be a source with enhanced properties for the usual mid-infrared applications, but could also address new applications such as tunable photonic oscillators, extreme events generators, chaotic Light Detection and Ranging (LIDAR), chaos-based secured communications or unpredictable countermeasures.
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Release | : 2015 |
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