@conference{38561, author = {Kevin Knabe and Paul Williams and Fabrizio Giorgetta and Chris Armacost and Michael Radunsky and Nathan Newbury}, title = {Frequency Characterization of an External-Cavity Quantum Cascade Laser at 4.5 υm using a Frequency Comb}, year = {2012}, month = {2012-01-25}, publisher = {Proceedings of Laser Applications to Chemical, Security and Environmental Analysis, San Diego, CA}, language = {en}, }