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Photonics 2019, 6(1), 6; https://doi.org/10.3390/photonics6010006

Multi-Spectral Quantum Cascade Lasers on Silicon With Integrated Multiplexers

1
Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA
2
Code 5613, Naval Research Laboratory, Washington, DC 20375, USA
*
Author to whom correspondence should be addressed.
Current address: Applied Physics Division, National Institute of Standards and Technology, Boulder, CO 80305, USA.
Received: 3 January 2019 / Revised: 16 January 2019 / Accepted: 22 January 2019 / Published: 24 January 2019
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Abstract

Multi-spectral midwave-infrared (mid-IR) lasers are demonstrated by directly bonding quantum cascade epitaxial gain layers to silicon-on-insulator (SOI) waveguides with arrayed waveguide grating (AWG) multiplexers. Arrays of distributed feedback (DFB) and distributed Bragg-reflection (DBR) quantum cascade lasers (QCLs) emitting at ∼4.7 µm wavelength are coupled to AWGs on the same chip. Low-loss spectral beam combining allows for brightness scaling by coupling the light generated by multiple input QCLs into the fundamental mode of a single output waveguide. Promising results are demonstrated and further improvements are in progress. This device can lead to compact and sensitive chemical detection systems using absorption spectroscopy across a broad spectral range in the mid-IR as well as a high-brightness multi-spectral source for power scaling. View Full-Text
Keywords: quantum cascade laser; silicon photonics; distributed feedback laser; mid-infrared; arrayed waveguide grating quantum cascade laser; silicon photonics; distributed feedback laser; mid-infrared; arrayed waveguide grating
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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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Stanton, E.J.; Spott, A.; Peters, J.; Davenport, M.L.; Malik, A.; Volet, N.; Liu, J.; Merritt, C.D.; Vurgaftman, I.; Kim, C.S.; Meyer, J.R.; Bowers, J.E. Multi-Spectral Quantum Cascade Lasers on Silicon With Integrated Multiplexers. Photonics 2019, 6, 6.

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