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- Title
Shot-noise limited, supercontinuum-based optical coherence tomography.
- Authors
Rao D. S., Shreesha; Jensen, Mikkel; Grüner-Nielsen, Lars; Olsen, Jesper Toft; Heiduschka, Peter; Kemper, Björn; Schnekenburger, Jürgen; Glud, Martin; Mogensen, Mette; Israelsen, Niels Møller; Bang, Ole
- Abstract
We present the first demonstration of shot-noise limited supercontinuum-based spectral domain optical coherence tomography (SD-OCT) with an axial resolution of 5.9 μm at a center wavelength of 1370 nm. Current supercontinuum-based SD-OCT systems cannot be operated in the shot-noise limited detection regime because of severe pulse-to-pulse relative intensity noise of the supercontinuum source. To overcome this disadvantage, we have developed a low-noise supercontinuum source based on an all-normal dispersion (ANDi) fiber, pumped by a femtosecond laser. The noise performance of our 90 MHz ANDi fiber-based supercontinuum source is compared to that of two commercial sources operating at 80 and 320 MHz repetition rate. We show that the low-noise of the ANDi fiber-based supercontinuum source improves the OCT images significantly in terms of both higher contrast, better sensitivity, and improved penetration. From SD-OCT imaging of skin, retina, and multilayer stacks we conclude that supercontinuum-based SD-OCT can enter the domain of shot-noise limited detection.
- Publication
Light: Science & Applications, 2021, Vol 10, Issue 1, p1
- ISSN
2047-7538
- Publication type
Article
- DOI
10.1038/s41377-021-00574-x