Mid-infrared quantum cascade lasers with high wall plug efficiency

Y. Bai; B. Gokden; S. Slivken; S. R. Darvish; S. A. Pour; M. Razeghi

doi:10.1117/12.810281

26 January 2009 Mid-infrared quantum cascade lasers with high wall plug efficiency

Y. Bai, B. Gokden, S. Slivken, S. R. Darvish, S. A. Pour, M. Razeghi

Proceedings Volume 7222, Quantum Sensing and Nanophotonic Devices VI; 72220O (2009) https://doi.org/10.1117/12.810281
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We demonstrate optimization of continuous wave (cw) operation of 4.6 μm quantum cascade lasers (QCLs). A 19.7 μm by 5 mm, double channel processed device exhibits 33% cw WPE at 80 K. Room temperature cw WPE as high as 12.5% is obtained from a 10.6 μm by 4.8 mm device, epilayer-down bonded on a diamond submount. With the semi-insulating regrowth in a buried ridge geometry, 15% WPE is obtained with 2.8 W total output power in cw mode at room temperature. This accomplishment is achieved by systematically decreasing the parasitic voltage drop, reducing the waveguide loss and improving the thermal management.

Citation Download Citation

Y. Bai, B. Gokden, S. Slivken, S. R. Darvish, S. A. Pour, and M. Razeghi "Mid-infrared quantum cascade lasers with high wall plug efficiency", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220O (26 January 2009); https://doi.org/10.1117/12.810281

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