Combined Neodymium–Ytterbium-Doped ASE Fiber-Optic Source for Optical Coherence Tomography Applications

Trifanov, I.; Caldas, P.; Neagu, L.; Romero, R.; Berendt, M. O.; Salcedo, J. A. R.; Podoleanu, A. Gh.; Lobo Ribeiro, Antonio B.

http://hdl.handle.net/10284/7865

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Authors

Lobo Ribeiro, Antonio B.

Abstract(s)

Optical coherence tomography (OCT) imaging at the 1060-nm region proved to be a successful alternative in oph- thalmology not only for resolving intraretinal layers, but also for enabling sufficient penetration to monitor the subretinal vascu- lature in the choroid when compared to most commonly used OCT imaging systems at the 800-nm region. To encourage further clinical research at this particular wavelength, we have developed a compact fiber-optic source based on amplified spontaneous emission (ASE) centered at 1060 nm with 70-nm spectral bandwidth at full-width at half-maximum and output power 20 mW. Our approach is based on a combination of slightly shifted ASE emission spectra from a combination of Neodymium- and Ytterbium-doped fibers. Spectral shaping and power op- timization have been achieved using in-fiber filtering schemes. We have tested the performance of the source in an OCT system optimized for this wavelength.