Multiwatt long wavelength quantum cascade lasers based on high strain composition with 70% injection efficiency.

A strain-balanced, AlInAs/InGaAs/InP quantum cascade laser structure, designed for light emission near 9 µm, was grown by molecular beam epitaxy. Laser devices were processed in buried heterostructure geometry. Maximum pulsed and continuous wave room temperature optical power of 4.5 and 2 W and wallplug efficiency of 16% and 10%, respectively, were demonstrated for a 3mm by 10 µm laser mounted epi-side down on an AlN/SiC composite submount. Pulsed laser characteristics were shown to be self-consistently described by a simple model based on rate equations using measured 70% injection efficiency for the upper laser level.

[1]  Jérôme Faist,et al.  A density matrix model of transport and radiation in quantum cascade lasers , 2010 .

[2]  Manijeh Razeghi,et al.  Very high wall plug efficiency of quantum cascade lasers , 2010, OPTO.

[3]  Carlo Sirtori,et al.  Resonant tunneling in quantum cascade lasers , 1998 .

[4]  M. Razeghi,et al.  High-Performance InP-Based Mid-IR Quantum Cascade Lasers , 2009, IEEE Journal of Selected Topics in Quantum Electronics.

[5]  Mariano Troccoli,et al.  Quantum cascade lasers: high-power emission and single-mode operation in the long-wave infrared (λ>6 μm) , 2010 .

[6]  Alexei Tsekoun,et al.  λ~7.1 μm quantum cascade lasers with 19% wall-plug efficiency at room temperature. , 2011, Optics express.

[7]  J. Faist,et al.  High-power long-wavelength (/spl lambda//spl sim/11.5 μm) quantum cascade lasers operating above room temperature , 1998, IEEE Photonics Technology Letters.

[8]  Federico Capasso,et al.  High power thermoelectrically cooled and uncooled quantum cascade lasers with optimized reflectivity facet coatings , 2009 .

[9]  Jerry R. Meyer,et al.  Temperature dependence of the key electro-optical characteristics for midinfrared emitting quantum cascade lasers , 2010 .

[10]  Manijeh Razeghi,et al.  Room temperature quantum cascade lasers with 27% wall plug efficiency , 2011 .

[11]  Manijeh Razeghi,et al.  Watt level performance of quantum cascade lasers in room temperature continuous wave operation at λ∼3.76 μm , 2010 .

[12]  Federico Capasso,et al.  High-performance continuous-wave room temperature 4.0-μm quantum cascade lasers with single-facet optical emission exceeding 2 W , 2010, Proceedings of the National Academy of Sciences.

[13]  C. Kumar N. Patel,et al.  Tapered 4.7 μm quantum cascade lasers with highly strained active region composition delivering over 4.5 watts of continuous wave optical power. , 2012, Optics express.

[14]  Qi Jie Wang,et al.  3 W Continuous-Wave Room Temperature Single-Facet Emission From Quantum Cascade Lasers Based On Nonresonant Extraction Design Approach , 2009 .