1 November 2010 Progress in high-performance quantum cascade lasers
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Optical Engineering, 49(11), 111105 (2010). doi:10.1117/1.3506192
Because of their compact size, reliability, tunability, and convenience of direct electrical pumping, quantum cascade lasers have found a number of important civilian and defense applications in the midwave infrared and long-wave-infrared spectral range. Most of these applications would benefit from higher laser optical power and higher wall-plug efficiency. We describe some of the most important features of high-efficiency quantum cascade laser design and realization of high-power quantum cascade laser systems. Specifically, optimization of the active region and waveguide, thermal management on the chip level, and impact of the laser facet coating on laser efficiency and scaling of optical power with cavity length are discussed. Also, we present experimental results demonstrating multiwatt operation with reliability of at least several thousands of hours on a system level.
Arkadiy A. Lyakh, Richard Maulini, Alexei G. Tsekoun, Chandra Kumar N. Patel, "Progress in high-performance quantum cascade lasers," Optical Engineering 49(11), 111105 (1 November 2010). https://doi.org/10.1117/1.3506192

Quantum cascade lasers

Continuous wave operation


Aluminum nitride

Antireflective coatings


Pulsed laser operation

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