Wide single-mode tuning in quantum cascade lasers with asymmetric Mach-Zehnder interferometer type cavities with separately biased arms

Mei C. Zheng, Peter Q. Liu, Xiaojun Wang, Jen Yu Fan, Mariano Troccoli, Claire F. Gmachl

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report on the experimental demonstration of a widely tunable single mode quantum cascade laser with Asymmetric Mach-Zehnder (AMZ) interferometer type cavities with separately biased arms. Current and, consequently, temperature tuning of the two arms of the AMZ type cavity resulted in a single mode tuning range of 20 cm-1 at 80 K in continuous-wave mode operation, a ten-fold improvement from the lasers under a single bias current. In addition, we also observed a five fold increase in the tuning rate as compared to the AMZ cavities controlled by one bias current.

Original languageEnglish (US)
Article number211112
JournalApplied Physics Letters
Volume103
Issue number21
DOIs
StatePublished - Nov 18 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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