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Photonics 2016, 3(2), 35; doi:10.3390/photonics3020035

Heterogeneously Integrated Distributed Feedback Quantum Cascade Lasers on Silicon

Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA
Code 5613, Naval Research Laboratory, Washington, DC 20375, USA
Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706, USA
Author to whom correspondence should be addressed.
Received: 28 April 2016 / Revised: 29 May 2016 / Accepted: 30 May 2016 / Published: 2 June 2016
(This article belongs to the Special Issue Quantum Cascade Lasers - Advances and New Applications)
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Silicon integration of mid-infrared (MIR) photonic devices promises to enable low-cost, compact sensing and detection capabilities that are compatible with existing silicon photonic and silicon electronic technologies. Heterogeneous integration by bonding III-V wafers to silicon waveguides has been employed previously to build integrated diode lasers for wavelengths from 1310 to 2010 nm. Recently, Fabry-Pérot Quantum Cascade Lasers integrated on silicon provided a 4800 nm light source for mid-infrared (MIR) silicon photonic applications. Distributed feedback (DFB) lasers are appealing for many high-sensitivity chemical spectroscopic sensing applications that require a single frequency, narrow-linewidth MIR source. While heterogeneously integrated 1550 nm DFB lasers have been demonstrated by introducing a shallow surface grating on a silicon waveguide within the active region, no mid-infrared DFB laser on silicon has been reported to date. Here we demonstrate quantum cascade DFB lasers heterogeneously integrated with silicon-on-nitride-on-insulator (SONOI) waveguides. These lasers emit over 200 mW of pulsed power at room temperature and operate up to 100 °C. Although the output is not single mode, the DFB grating nonetheless imposes wavelength selectivity with 22 nm of thermal tuning. View Full-Text
Keywords: quantum cascade laser; silicon photonics; distributed feedback laser; mid-infrared quantum cascade laser; silicon photonics; distributed feedback laser; mid-infrared

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Spott, A.; Peters, J.; Davenport, M.L.; Stanton, E.J.; Zhang, C.; Merritt, C.D.; Bewley, W.W.; Vurgaftman, I.; Kim, C.S.; Meyer, J.R.; Kirch, J.; Mawst, L.J.; Botez, D.; Bowers, J.E. Heterogeneously Integrated Distributed Feedback Quantum Cascade Lasers on Silicon. Photonics 2016, 3, 35.

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