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Developing a compact multiple laser diode combiner with a single fiber stub output for handheld IoT devices

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Abstract

Many biomedical applications require an efficient combination and localization of multiple discrete light sources (e.g., fluorescence and absorbance imaging). We present a compact 6 channel combiner that couples the output of independent solid-state light sources into a single 400-μm-diameter fiber stub for handheld Internet of Things (IoT) devices. We demonstrate average coupling efficiencies > 80% for each of the 6 laser diodes installed into the prototype. The design supports the use of continuous wave and intensity-modulated laser diodes. This fiber-stub-type beam combiner could be used to construct custom multi-wavelength sources for tissue oximeters, microscopes and molecular imaging technologies. In order to validate its suitability, we applied the developed fiber-stub-type beam combiner to a multi-wavelength light source for a handheld IoT device and demonstrated its feasibility for smart healthcare through a tumor-mimicking silicon phantom.

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Authors and Affiliations

  1. Beckman Laser Institute-Korea, Dankook University, Cheonan, 31116, Korea

    Minseok Lee

  2. Department of Medical Laser, Dankook University, Cheonan, 31116, Korea

    Seunghyeok June

  3. Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan, 31116, Korea

    Sehwan Kim

Authors
  1. Minseok Lee
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  2. Seunghyeok June
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  3. Sehwan Kim
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Correspondence to Sehwan Kim.

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Lee, M., June, S. & Kim, S. Developing a compact multiple laser diode combiner with a single fiber stub output for handheld IoT devices. Journal of the Korean Physical Society 72, 71–78 (2018). https://doi.org/10.3938/jkps.72.71

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  • DOI: https://doi.org/10.3938/jkps.72.71

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