Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2937207
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We have analyzed light absorption in a quantum cascade laser (QCL) structure under forward and reverse bias. Strong laser frequency absorption modulation is predicted and observed for the voltage variation within the high differential resistance voltage range. We propose to use this mechanism for monolithically integrated intracavity modulation of QCLs with suppressed thermal chirp. In addition, the described method allows for extraction of the intersubband absorption component of the total waveguide losses. (C) 2008 American Institute of Physics.
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