High power frequency comb based on mid-infrared quantum cascade laser at λ ∼ 9 μ m

Q. Y. Lu, M. Razeghi, S. Slivken, N. Bandyopadhyay, Y. Bai, W. J. Zhou, M. Chen, D. Heydari, A. Haddadi, R. McClintock, M. Amanti, C. Sirtori

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

We investigate a frequency comb source based on a mid-infrared quantum cascade laser at λ ∼ 9 μm with high power output. A broad flat-top gain with near-zero group velocity dispersion has been engineered using a dual-core active region structure. This favors the locking of the dispersed Fabry-Pérot modes into equally spaced frequency lines via four wave mixing. A current range with a narrow intermode beating linewidth of 3 kHz is identified with a fast detector and spectrum analyzer. This range corresponds to a broad spectral coverage of 65 cm-1 and a high power output of 180 mW for ∼176 comb modes.

Original languageEnglish (US)
Article number051105
JournalApplied Physics Letters
Volume106
Issue number5
DOIs
StatePublished - Feb 2 2015

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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