Publication: Gain competition in dual wavelength quantum cascade lasers
Date
2010
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The Optical Society
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Geiser, Markus, Christian Pflügl, Alexey Belyanin, Qi Jie Wang, Nanfang Yu, Tadanaka Edamura, Masamichi Yamanishi, et al. 2010. “Gain Competition in Dual Wavelength Quantum Cascade Lasers.” Optics Express 18 (10) (April 27): 9900. doi:10.1364/oe.18.009900.
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Abstract
We investigated dual wavelength mid-infrared quantum cascade lasers based on heterogeneous cascades. We found that due to gain competition laser action tends to start in higher order lateral modes. The mid-infrared mode with the lower threshold current reduces population inversion for the second laser with the higher threshold current due to stimulated emission. We developed a rate equation model to quantitatively describe mode interactions due to mutual gain depletion.
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