Swept source optical coherence tomography using an all-fiber 1300-nm ring laser source.
The increased sensitivity of spectral domain optical coherence tomography (OCT) has driven the development of a new generation of technologies in OCT, including rapidly tunable, broad bandwidth swept laser sources and spectral domain OCT interferometer topologies. In this work, the operation of a turnkey 1300-nm swept laser source is demonstrated. This source has a fiber ring cavity with a semiconductor optical amplifier gain medium. Intracavity mode selection is achieved with an in-fiber tunable fiber Fabry-Perot filter. A novel optoelectronic technique that allows for even sampling of the swept source OCT signal in k space also is described. A differential swept source OCT system is presented, and images of in vivo human cornea and skin are presented. Lastly, the effects of analog-to-digital converter aliasing on image quality in swept source OCT are discussed.
Choma
Michael A
MA
Duke University, Department of Biomedical Engineering, 136 Hudson Hall, Durham, North Carolina 27708, USA. mac32@duke.edu
Hsu
Kevin
K
Izatt
Joseph A
JA
D003315:Cornea / Q000166:cytology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006801:Humans; D018613:Microscopy, Confocal / Q000295:instrumentation* / Q000379:methods; D019721:Ophthalmoscopes; D015203:Reproducibility of Results; D012666:Semiconductors; D012680:Sensitivity and Specificity; D012867:Skin / Q000166:cytology*; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods