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

Journal Article · Mon Nov 18 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4832337· OSTI ID:22253991

Gmachl, Claire F. ^[1]; Liu, Peter Q. ^[1]; Wang, Xiaojun; Fan, Jen-Yu; Troccoli, Mariano ^[2]

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1. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)
2. AdTech Optics, Inc., City of Industry, California 91748 (United States)

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{sup −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.

• OSTI ID: 22253991
• Journal Information: Applied Physics Letters, Vol. 103, Issue 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CURRENTS
LASERS
MACH-ZEHNDER INTERFEROMETER