Distributed feedback quantum cascade lasers

TL;DR: The design flexibility of quantum cascade lasers has enabled their expansion into mid-infrared wavelengths of 3-25 µm as discussed by the authors. But their performance has not yet reached the state-of-the-art in terms of power and power efficiency.

TL;DR: A review of the development, application, and current capabilities of infrared laser-absorption spectroscopy (IR-LAS) sensors for combustion gases can be found in this paper.

TL;DR: Recent advances in room-temperature, near-IR and visible diode laser sources for tele-communication, high-speed computer networks, and optical data storage applications are enabling a new generation of gas-dynamic and combustion-flow sensors based on laser absorption spectroscopy, suggesting likely directions for future research and development.

TL;DR: In the short space of 15 years since their first demonstration, quantum cascade lasers have become the most useful sources of tunable mid-infrared laser radiation as discussed by the authors, and the potential application of quantum cascade laser in other areas of chemical physics such as research on helium droplets, in population pumping and in matrix isolation infrared photochemistry.

TL;DR: In this article, an analysis of laser action in a periodic structure is presented, where the resonant frequencies and threshold criteria for the modes of oscillation have been determined for both index and gain periodicities.

TL;DR: In this paper, the high power operation of mid-infrared quantum cascade lasers at temperatures up to T =320 K was reported, where a molecular beam epitaxy grown InP top cladding layer was also used to optimize heat dissipation.

TL;DR: By loading periodic loss perturbation into a GaAlAs/GaAs distributed feedback laser, this paper realized complete single longitudinal mode oscillation which is hardly disturbed by cleaved facet reflection.

TL;DR: The GaInAs/AlInAs structures, grown by molecular beam epitaxy, are based on a vertical intersubband transition scheme and use a plasmonenhanced waveguide geometry to reduce losses and increase the confinement factor.