We present here a new technique called Frequency Domain Shortwave Infrared Spectroscopy (FD-SWIRS), which provides absolute broadband optical property extractions as well as tissue water and lipids concentrations using shortwave infrared light. Measurements from a custom digital FD system at 730, 852, 940, and 980 nm were combined with broadband continuous wave (CW) measurements (900 - 1310 nm). FD and CW measurements were integrated using model-based analysis to provide broadband absolute absorption and reduced scattering spectra. Intralipid and heavy water titrations, drift, SNR, a porcine desiccation experiment, and other key experiments were conducted to characterize the system.
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