Comparison of optical coherence tomography profiles for three different wavelengths in the near infrared

Optical Coherence Tomography is a powerful, noninvasive biomedical technique that uses low coherence light sources to obtain in-depth scans of biological tissues. In this study, we report results obtained with three different sources: a 60 nm bandwidth superluminescent diode with a 1570 nm emission wavelength, a high power broadband fiber source (up to 100 nm bandwidth around 1330 nm wavelength), and a Ti:Sapphire ultrashort-pulsed laser (810 nm emission wavelength and 100 nm maximum bandwidth). Along with enhancement of some details and discontinuities in heterogeneous tissues, characterization of samples using these three wavelengths allows for a more complete description of tissue optical properties, such as attenuation, backscattering, or penetration depth. We will present results obtained in vitro on several samples of biological tissues.