Broadband instrumentation for spectroscopy in turbid media using NIR

A custom designed broadband NIR spectroscopy system is reported. A high-speed high power optical transmitter is designed over the frequency range from 100 MHz up to 3 GHz. Phantom experiments are performed to extract optical parameters of a turbid media simulating a breast tissue. Both broadband and single-frequency extraction methods are used to extract optical parameters of the phantom model. The comparison shows that the achieved extraction accuracy of optical parameter (/spl mu//sub a/, /spl mu//sub z/) using broadband extraction method is better than the single frequency technique.