Optimizing facet coating of quantum cascade lasers for low power consumption

Y. Bai; S. R. Darvish; N. Bandyopadhyay; S. Slivken; M. Razeghi

doi:10.1063/1.3553863

Optimizing facet coating of quantum cascade lasers for low power consumption

Y. Bai, S. R. Darvish, N. Bandyopadhyay, S. Slivken, M. Razeghi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Typical high power consumption (∼10 W) of mid-infrared quantum cascade lasers (QCLs) has been a serious limitation for applications in battery powered systems. A partial high-reflection (PHR) coating technique is introduced for power downscaling with shorter cavity lengths. The PHR coating consists of a double layer dielectric of SiO₂ and Ge. With this technique, a 4.6 μm QCL with an ultra low threshold power consumption of less than a watt (0.83 W) is demonstrated in room temperature continuous wave operation. At 25°C, the maximum output power and wall plug efficiency are 192 mW and 8.6, respectively.

Original language	English (US)
Article number	053103
Journal	Journal of Applied Physics
Volume	109
Issue number	5
DOIs	https://doi.org/10.1063/1.3553863
State	Published - Mar 1 2011

Funding

The authors would like to acknowledge the partial support, interest, and encouragement of R. S. Rodgers and M. Rosker from Defense Advanced Research Projects Agency.

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "Typical high power consumption (∼10 W) of mid-infrared quantum cascade lasers (QCLs) has been a serious limitation for applications in battery powered systems. A partial high-reflection (PHR) coating technique is introduced for power downscaling with shorter cavity lengths. The PHR coating consists of a double layer dielectric of SiO2 and Ge. With this technique, a 4.6 μm QCL with an ultra low threshold power consumption of less than a watt (0.83 W) is demonstrated in room temperature continuous wave operation. At 25°C, the maximum output power and wall plug efficiency are 192 mW and 8.6, respectively.",

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AU - Darvish, S. R.

AU - Bandyopadhyay, N.

AU - Slivken, S.

AU - Razeghi, M.

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AB - Typical high power consumption (∼10 W) of mid-infrared quantum cascade lasers (QCLs) has been a serious limitation for applications in battery powered systems. A partial high-reflection (PHR) coating technique is introduced for power downscaling with shorter cavity lengths. The PHR coating consists of a double layer dielectric of SiO2 and Ge. With this technique, a 4.6 μm QCL with an ultra low threshold power consumption of less than a watt (0.83 W) is demonstrated in room temperature continuous wave operation. At 25°C, the maximum output power and wall plug efficiency are 192 mW and 8.6, respectively.

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Optimizing facet coating of quantum cascade lasers for low power consumption

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