Room Temperature CW Operation of Short Wavelength Quantum Cascade Lasers Made of Strain Balanced Ga bm x In bm 1 - x As/Al bm y In bm 1 - y As Material on InP Substrates

We present our recent development of short wavelength quantum cascade lasers (QCLs) made of strain balanced Ga x In 1 - x As/Al y In 1 - y As material on InP substrates. We demonstrate room temperature continuous-wave (CW) lasing of the fundamental lateral mode at four wavelengths of 4.6, 4.0, 3.8,...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2011-09, Vol.17 (5), p.1445-1452
Main Authors: Xie, Feng, Caneau, Catherine, LeBlanc, Herve P, Visovsky, Nick J, Chaparala, Satish C, Deichmann, Oberon D, Hughes, Lawrence C, Zah, Chung-en, Caffey, David P, Day, Timothy
Format: Article
Language:English
Subjects:
Aluminum
Balancing
Gallium
Indium phosphides
Lasing
Materials selection
Strain
Wavelengths
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Summary:We present our recent development of short wavelength quantum cascade lasers (QCLs) made of strain balanced Ga x In 1 - x As/Al y In 1 - y As material on InP substrates. We demonstrate room temperature continuous-wave (CW) lasing of the fundamental lateral mode at four wavelengths of 4.6, 4.0, 3.8, and 3.5 mu m. We obtained 60-mW CW output power at 10 degree C and 3.55- mu m wavelength, which is the shortest CW lasing wavelength demonstrated at room temperature by a QCL, to the best of our knowledge. We also performed a life test on lambda = 4.6 mu m QCL chips. To date, we have accumulated the life test data for more than 11 000 and 4100 h under two aging conditions, 20 degree C and 0.85-A constant current, and 60 degree C and 1-A constant current, respectively.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2011.2136325