Room temperature continuous wave operation of long wavelength (9-11 μm) distributed feedback quantum cascade lasers for glucose detection

Feng Xie; Catherine Caneau; Herve P. LeBlanc; Sean Coleman; Ming-Tsung Ho; Lawrence C. Hughes; Chung-en Zah

doi:10.1117/12.2004895

4 March 2013 Room temperature continuous wave operation of long wavelength (9-11 μm) distributed feedback quantum cascade lasers for glucose detection

Feng Xie, Catherine Caneau, Herve P. LeBlanc, Sean Coleman, Ming-Tsung Ho, Lawrence C. Hughes, Chung-en Zah

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Proceedings Volume 8640, Novel In-Plane Semiconductor Lasers XII; 864016 (2013) https://doi.org/10.1117/12.2004895
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

Using a range of grating pitches, we obtained distributed feedback (DFB) quantum cascade lasers (QCL) operating CW at room temperature over the 9-11μm range. Single mode CW operation is demonstrated up to 10.8 μm, and up to 40 °C. To the best of our knowledge, it is the longest wavelength reported for a DFB QCL operating CW above room temperature. The wavelength coverage per wafer is larger than 110 cm-1. DFB QCLs from two wafers which have different gain peaks have lasing wavelengths near optical absorption peaks of glucose.

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Feng Xie, Catherine Caneau, Herve P. LeBlanc, Sean Coleman, Ming-Tsung Ho, Lawrence C. Hughes, and Chung-en Zah "Room temperature continuous wave operation of long wavelength (9-11 μm) distributed feedback quantum cascade lasers for glucose detection", Proc. SPIE 8640, Novel In-Plane Semiconductor Lasers XII, 864016 (4 March 2013); https://doi.org/10.1117/12.2004895

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KEYWORDS

Quantum cascade lasers

Semiconducting wafers

Continuous wave operation

Glucose

Absorption

Molecules

Pulsed laser operation

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