From Event: SPIE Optical Engineering + Applications, 2017
Quantum cascade lasers (QCL) have become the most suitable laser sources from the mid-infrared to the THz range. This work examines the effects of external feedback in different high power mid infrared QCL structures and shows that different conditions of the feedback wave can produce complex dynamics hence stabilization, destabilization into strong mode-competition or undamping nonlinear oscillations. As a dynamical system, reinjection of light back into the cavity also can also provoke apparition of chaotic oscillations, which must be avoided for a stable operation both at mid-infrared and THz wavelengths.
F. Grillot, T. C. Newell, A. Gavrielides, and M. Carras, "Complex delay dynamics of high power quantum cascade oscillators," Proc. SPIE 10383, Terahertz Emitters, Receivers, and Applications VIII, 103830D (Presented at SPIE Optical Engineering + Applications: August 06, 2017; Published: 23 August 2017); https://doi.org/10.1117/12.2275630.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.
Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon