Low-Threshold High-Temperature Operation of ～7.4μm Quantum Cascade Lasers
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Abstract
We report low-threshold high-temperature operation of 7.4μm strain-compensated InGaAs/InAlAs quantum cascade lasers (QCLs). For an
uncoated 22-μm-wide and 2-mm-long laser, the low-threshold current
densities, i.e. 0.33kA/cm2 at 81K in pulsed mode and 0.64kA/cm2 at 84K in cw mode, are realized. High-temperature operation of uncoated devices, with a high value of 223K, is achieved in cw mode.
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LI Lu, LIU Feng-Qi, SHAO Ye, LIU Jun-Qi, WANG Zhan-Guo. Low-Threshold High-Temperature Operation of ～7.4μm Quantum Cascade Lasers[J]. Chin. Phys. Lett., 2007, 24(6): 1577-1579.
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LI Lu, LIU Feng-Qi, SHAO Ye, LIU Jun-Qi, WANG Zhan-Guo. Low-Threshold High-Temperature Operation of ～7.4μm Quantum Cascade Lasers[J]. Chin. Phys. Lett., 2007, 24(6): 1577-1579.
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LI Lu, LIU Feng-Qi, SHAO Ye, LIU Jun-Qi, WANG Zhan-Guo. Low-Threshold High-Temperature Operation of ～7.4μm Quantum Cascade Lasers[J]. Chin. Phys. Lett., 2007, 24(6): 1577-1579.
|
LI Lu, LIU Feng-Qi, SHAO Ye, LIU Jun-Qi, WANG Zhan-Guo. Low-Threshold High-Temperature Operation of ～7.4μm Quantum Cascade Lasers[J]. Chin. Phys. Lett., 2007, 24(6): 1577-1579.
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