Journal
ELECTRONICS LETTERS
Volume 47, Issue 11, Pages 667-U56Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el.2011.0753
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- Texas Higher Education Coordinating Board
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Reported are the design and performance of GaInAs/AlInAs/InP quantum cascade laser sources based on intra-cavity second-harmonic generation providing an output at 2.95 mu m wavelength. To produce frequency doubling, devices contain a passive heterostructure tailored for giant optical nonlinearity integrated on top of an active region and patterned for quasi-phase matching. The sources have a threshold current density of 2.2 kA/cm(2) and provide approximately 35 mu W of second-harmonic output at room temperature. The second-harmonic conversion efficiency is approximately 75 mu W/W-2.
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