Mid-IR quantum cascade laser mode coupling in fiber

Sensen Li; Biyi Wang; Guanjun Zhou; Xiusheng Yan

doi:10.1117/12.2573580

10 October 2020 Mid-IR quantum cascade laser mode coupling in fiber

Sensen Li, Biyi Wang, Guanjun Zhou, Xiusheng Yan

Proceedings Volume 11545, Semiconductor Lasers and Applications X; 115450K (2020) https://doi.org/10.1117/12.2573580
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

Quantum cascade laser (QCL) emitting in the mid-wave infrared atmospheric windows (3μm to 5 μm) will be of immediate use to several civilian applications, including airborne self-defense protection system and trace gas sensing and free space optical communications. In this work, an experimental study of laser coupling in fiber-optic waveguide with small-bore diameters of d =105 μm. The output beam quality of QCL transmission out of the fiber is analyzed. The output laser nearfield and the farfiled of a QCL with nearly 500 mW continuous wave power at room temperature is measured by a two-dimensional beam quality analyzer. Results show that the output nearfield and farfield is nearly super-Gaussian distributed after tansmition from the multimode fiber.

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Sensen Li, Biyi Wang, Guanjun Zhou, and Xiusheng Yan "Mid-IR quantum cascade laser mode coupling in fiber", Proc. SPIE 11545, Semiconductor Lasers and Applications X, 115450K (10 October 2020); https://doi.org/10.1117/12.2573580

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