@article{6624ac0af7934ad592b00de560187fed,
title = "Active mode locking of broadband quantum cascade lasers",
abstract = "Active mode locking in broadband quantum cascade (QC) lasers with a repetition rate of about 14.3 GHz has been achieved through the modulation of the laser bias current. At low driving currents, the active mode locking in broadband QC lasers resembles the active mode locking in single-wavelength QC lasers, while at high driving currents, the mode locking properties are governed by the broad spectral gain of these lasers. At high bias currents, the active modulation excites Fabry-Perot modes across the entire gain spectrum from 6.7 to 7.4 μm, with clear evidence of mode locking. The spectral width of the optical gain in the broadband QC lasers exceeds 2 THz and indicates the potential for generating subpicosecond pulses.",
author = "Alexander Soibel and Federico Capasso and Gmachl, {Claire F.} and Peabody, {Milton L.} and Sergent, {A. Michael} and Roberto Paiella and Hwang, {Harold Y.} and Sivco, {Deborah L.} and Cho, {Alfred Y.} and Liu, {H. C.} and Christian Jirauschek and K{\"a}rtner, {Franz X.}",
note = "Funding Information: Manuscript received December 23, 2003; revised April 2, 2004. This work was supported in part by the Defense Advanced Research Projects Agency and the U.S. Army Research Office under Contract DAAD 19-00-C-0096. A. Soibel was with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. He is now with the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 USA (e-mail: Alexander.Soibel@jpl.nasa.gov). F. Capasso is with the Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA (e-mail: capasso@deas.harvard.edu). C. Gmachl is with the Department of Electrical Engineering, Princeton University, Princeton, NJ 08544 USA. M. L. Peabody, A. M. Sergent, D. L. Sivco, and A. Y. Cho are with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. R. Paiella is with the Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215 USA. H. Y. Hwang is with Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan. H. C. Liu is with the Institute of Microstructural Science, National Research Council, Ottawa, ON, K1A R6 Canada. C. Jirauschek and F. X. K{\"a}rtner are with the Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Mas-sachussets Institute of Technology, Cambridge, MA 02139 USA. Digital Object Identifier 10.1109/JQE.2004.830186",
year = "2004",
month = jul,
doi = "10.1109/JQE.2004.830186",
language = "English (US)",
volume = "40",
pages = "844--851",
journal = "IEEE Journal of Quantum Electronics",
issn = "0018-9197",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",
}