Diffuse optical tomography using wavelength-swept laser

Jaedu Cho; Gukbin Lim; Myung Yung Jeong; Orhan Nalcioglu; Chang-Seok Kim; Gultekin Gulsen

doi:10.1117/12.2004831

25 March 2013 Diffuse optical tomography using wavelength-swept laser

Jaedu Cho, Gukbin Lim, Myung Yung Jeong, Orhan Nalcioglu, Chang-Seok Kim, Gultekin Gulsen

Proceedings Volume 8578, Optical Tomography and Spectroscopy of Tissue X; 85780U (2013) https://doi.org/10.1117/12.2004831
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

The design and implementation of a diffuse optical tomography system using wavelength-swept laser is described. Rapid and continuous wavelength change is utilized for high speed spectral scanning from 775 nm to 875 nm optical wavelength. Maximum speed of wavelength repetition is 1 kHz and averaged output power of the wavelength-swept laser is 20 mW. A fiber-optic Sagnac interferometer is incorporated to conduct passive amplitude modulation of the wavelength-swept laser. It is shown that the wavelength-swept laser can be successfully incorporated to the DOT system, and then reduces wavelength-shifting time and hardware complexity in multi-wavelength DOT implementation.

Citation Download Citation

Jaedu Cho, Gukbin Lim, Myung Yung Jeong, Orhan Nalcioglu, Chang-Seok Kim, and Gultekin Gulsen "Diffuse optical tomography using wavelength-swept laser", Proc. SPIE 8578, Optical Tomography and Spectroscopy of Tissue X, 85780U (25 March 2013); https://doi.org/10.1117/12.2004831

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KEYWORDS

Fiber optics

Light sources

Sagnac interferometers

Diffuse optical tomography

Modulation

Sensors

Laser systems engineering

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