Theoretical comparison of mid–wavelength infrared and long–wavelength infrared lasers

BROADBAND MID-INFRARED SOLID-STATE LASERS Broadband Mid-Infrared Lasers

A survey of broadband Co2+and Cr2+-based lasers is presented. These mid-IR sources, operating in the very interesting “molecular fingerprint” region between ∼1.6 and 3.5μm offer the broadest bandwidth from all solid-state vibronic lasers. The emphasize is made on Cr2+-doped lasers, which have not only the widest and the highest gain, but also operate at room-temperature and produce the shortest...

Infrared Lasers in Nanoscale Science

Characterization of mid-infrared quantum cascade lasers

Quantum cascade lasers provide some of the highest output powers available for light in the mid-infrared range (from 3 to 8 μm). As many of their applications require portability, designs that have a high wall-plug efficiency are essential, and were designed and grown by others to achieve this goal. However, because a large fraction of these devices did not operate at all, very few of the stand...

Comparison of near-infrared and thermal infrared cloud phase detections

[1] We compare the results of the cloud thermodynamic phase detections that use (1) the ratio of the near-infrared and visible bands or (2) the brightness temperature difference of two thermal infrared bands. We find that the brightness temperature difference algorithm using the Moderate Resolution Imaging Spectroradiometer (MODIS) bands is generally consistent with the expectations based on th...

Recombination-pumped triatomic hydrogen infrared lasers.

Mid-infrared laser lines observed in hydrogen/rare gas discharges are assigned to three-body recombination processes involving an electron, a rare gas (He or Ne) atom, and the triatomic hydrogen ion (H(3)(+)). Calculations of radiative transitions between neutral H(3) Rydberg states support this interpretation, and link it to recent results for hydrogenic∕rare gas afterglow plasmas. A mechanism...