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Optically tunable long wavelength infrared quantum cascade laser operated at room temperature

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5 Author(s)
Suchalkin, S. ; Department of Electrical and Computer Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, USA ; Jung, S. ; Tober, R. ; Belkin, M. A.
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We demonstrate rapid tuning of the emission frequency of a room-temperature mid-infrared quantum cascade laser by external optical pumping. Emission frequency tuning over 0.3 cm-1 (10 GHz) has been achieved for a λ = 9 μm device by optical generation of electron-hole pairs along the entire length of the laser stripe. Measurements indicate that this approach allows for rapid broadband frequency-modulation of mid-infrared quantum cascade lasers at above 300 MHz modulation frequencies.

Published in:

Applied Physics Letters  (Volume:102 ,  Issue: 1 )