A compact, multi-wavelength, and high frequency response light source for diffuse optical spectroscopy and imaging

Kyoungsu Park; Minseok Lee; Seung-ha Lee; Albert E. Cerussi; Phil-sang Chung; Sehwan Kim

doi:10.1117/12.2077901

5 March 2015 A compact, multi-wavelength, and high frequency response light source for diffuse optical spectroscopy and imaging

Kyoungsu Park, Minseok Lee, Seung-ha Lee, Albert E. Cerussi, Phil-sang Chung, Sehwan Kim

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Proceedings Volume 9319, Optical Tomography and Spectroscopy of Tissue XI; 931913 (2015) https://doi.org/10.1117/12.2077901
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Many biomedical applications require an efficient combination and localization of multiple discrete light sources. In this paper, we present a compact six-channel combiner of optical sub-assembly type that couples the output of independent solid-state light sources into a single 400 μm diameter optical fiber. It is equipped with six discrete laser diodes, 658, 690, 705, 785, 830, and 850 nm for the measurement of the tissue optical properties from optical spectroscopy and imaging. We demonstrate coupling efficiencies ≥ 77% and output optical power ≥ 20 mW for each of the 6 laser diodes installed into the prototype. The design supports the use of continuous wave and intensity modulated laser diodes (with bandwidth ≥ 3 GHz). The developed light source could be used to construct custom multi-wavelength sources for tissue oximeters, diffuse optical imaging, and molecular imaging technologies.

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Kyoungsu Park, Minseok Lee, Seung-ha Lee, Albert E. Cerussi, Phil-sang Chung, and Sehwan Kim "A compact, multi-wavelength, and high frequency response light source for diffuse optical spectroscopy and imaging", Proc. SPIE 9319, Optical Tomography and Spectroscopy of Tissue XI, 931913 (5 March 2015); https://doi.org/10.1117/12.2077901

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KEYWORDS

Light sources

Tissue optics

Mirrors

Optical fibers

Imaging spectroscopy

Optical imaging

Semiconductor lasers

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