@article { ISI:000284996200005,
	title = {High-performance midinfrared quantum cascade lasers},
	journal = {OPTICAL ENGINEERING},
	volume = {49},
	number = {11},
	year = {2010},
	month = {NOV},
	publisher = {SPIE-SOC PHOTOPTICAL INSTRUMENTATION ENGINEERS},
	type = {Article},
	address = {1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA},
	abstract = {The design and operating principles of quantum cascade lasers (QCLs) are reviewed along with recent developments in high-power cw and broadband devices. Cw power levels of several watts at room temperature have been achieved at 4.6-mu m wavelength; broadband single-mode tuning (approximate to 400 cm(-1)) has been achieved using an external-cavity QCL with a grating as a tuning element. An alternative approach, consisting of a monolithically integrated array of single-mode QCLs individually currentdriven by a microcontroller, has led to broadband single-mode tuning over a range of 200 cm(-1) without requiring the use of moving parts. This spectrometer on a chip holds promise for high-brightness compact trace-gas sensors capable of operating in harsh environments. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3505844]},
	keywords = {broadband, high power, laser arrays, Quantum cascade lasers, single mode},
	issn = {0091-3286},
	doi = {10.1117/1.3505844},
	author = {Federico Capasso}
}
