Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics

Jason M. Kriesel; Gina M. Hagglund; Nahum Gat; Vincenzo Spagnolo; Pietro Patimisco

doi:10.1117/12.2040018

31 January 2014 Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics

Jason M. Kriesel, Gina M. Hagglund, Nahum Gat, Vincenzo Spagnolo, Pietro Patimisco

Proceedings Volume 8993, Quantum Sensing and Nanophotonic Devices XI; 89930V (2014) https://doi.org/10.1117/12.2040018
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

Measurements characterizing spatial mode filtering of mid-infrared (mid-IR) laser beams using hollow core fiber optics are presented. The mode filtering depends strongly on the fiber diameter, with effective mode filtering demonstrated with bore diameters of d = 200 μm and 300 μm. In addition to mode filtering, beam profile measurements also demonstrate the strong dependence of the mode quality on the fiber coupling conditions. As predicted, optimal coupling is achieved using relatively slow optics that produce focused spots that nearly fill the fiber diameter. Examples of the utility of using hollow fibers for mode-filtering to improve molecular spectroscopy experiments are also discussed.

Citation Download Citation

Jason M. Kriesel, Gina M. Hagglund, Nahum Gat, Vincenzo Spagnolo, and Pietro Patimisco "Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics", Proc. SPIE 8993, Quantum Sensing and Nanophotonic Devices XI, 89930V (31 January 2014); https://doi.org/10.1117/12.2040018

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