@article { ISI:000176632000022,
	title = {Simultaneously at two wavelengths (5.0 and 7.5 mu m) singlemode and tunable quantum cascade distributed feedback lasers},
	journal = {ELECTRONICS LETTERS},
	volume = {38},
	number = {12},
	year = {2002},
	month = {JUN 6},
	pages = {565-567},
	publisher = {IEE-INST ELEC ENG},
	type = {Article},
	address = {MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND},
	abstract = {Quantum cascade distributed feedback (QC-DFB) lasers based on a heterogeneous-cascade two-wavelength active waveguide core and a multisectioned cavity featuring two different Bragg gratings are demonstrated. Optimised lasers display singlemode emission at lambda similar to 5.0 and 7.5 mum simultaneously and a tunability on both modes equal to single-wavelength QC-DFB lasers.},
	issn = {0013-5194},
	doi = {10.1049/el:20020355},
	author = {Straub, A and C. Gmachl and Sivco, DL and Sergent, AM and F. Capasso and Cho, AY}
}
