@article { ISI:000266454300016,
	title = {DFB Quantum Cascade Laser Arrays},
	journal = {IEEE JOURNAL OF QUANTUM ELECTRONICS},
	volume = {45},
	number = {5-6},
	year = {2009},
	month = {MAY-JUN},
	pages = {554-565},
	publisher = {IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC},
	type = {Article},
	address = {445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA},
	abstract = {DFB quantum cascade laser (DFB-QCL) arrays operating between 8.7 and 9.4 mu m are investigated for their performance characteristics-single-mode selection of the DFB grating, and variability in threshold, slope efficiency, and output power of different lasers in the array. Single-mode selection refers to the ability to choose a desired mode/frequency of laser emission with a DFB grating. We apply a theoretical framework developed for general DFB gratings to analyze DFB-QCL arrays. We calculate how the performance characteristics of DFB-QCLs are affected by the coupling strength kappa L of the grating, and the relative position of the mirror facets at the ends of the laser cavity with respect to the grating. We discuss how single-mode selection can be improved by design. Several DFB-QCL arrays are fabricated and their performance examined. We achieve desired improvements in single-mode selection, and we observe the predicted variability in the threshold, slope efficiency, and output power of the DFB-QCLs. As a demonstration of potential applications, the DFB-QCL arrays are used to perform infrared absorption spectroscopy with fluids.},
	keywords = {DFB lasers, Infrared Spectroscopy, mid-infrared, Quantum cascade lasers (QCLs), semiconductor lasers},
	issn = {0018-9197},
	doi = {10.1109/JQE.2009.2013175},
	author = {Lee, Benjamin G. and Belkin, Mikhail A. and Pfluegl, Christian and Diehl, Laurent and Zhang, Haifei A. and Audet, Ross M. and MacArthur, Jim and Bour, David P. and Corzine, Scott W. and Hoefler, Gloria E. and Federico Capasso}
}
