| Autor: |
Bai, Y., Darvish, S. R., Bandyopadhyay, N., Slivken, S., Razeghi, M. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Mar2011, Vol. 109 Issue 5, p053103, 4p, 3 Graphs |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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