7 February 2007 High-speed Fourier-domain optical coherence tomography using a chirped supercontinuum pulse source
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Abstract
We have demonstrated a Fourier-domain optical coherence tomography (FD-OCT) scheme with a high-speed frequency-swept light source based on a chirped supercontinuum pulse. Instead of using a swept laser, an ultra-wideband supercontinuum pulse was chirped or stretched in the time domain by using a long dispersive single-mode optical fiber by the help of the group velocity dispersion. The chirped pulse was used directly as frequency-swept light for OCT after measuring the relationship between the time delay and the wavelength. Very high acquisition speeds up to 5-MHz in A-line scan rate were achieved because there is no speed-limiting moving part in this scheme. And high resolution up to 3.6 &mgr;m in air was enabled owing to the use of wideband supercontinuum. It was shown that the scheme does not require re-calibration of the sweep characteristics because the sweeping mechanism is passive and stable.
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Sucbei Moon, Sucbei Moon, Dongsoo Lee, Dongsoo Lee, Dug Y. Kim, Dug Y. Kim, } "High-speed Fourier-domain optical coherence tomography using a chirped supercontinuum pulse source", Proc. SPIE 6429, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XI, 64291E (7 February 2007); doi: 10.1117/12.703132; https://doi.org/10.1117/12.703132
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