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23 April 2024 |
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Shot-noise limited, supercontinuum based optical coherence tomography | | Shreesha Rao D. S.
; Mikkel Jensen
; Lars Grüner-Nielsen
; Jesper Toft Olsen
; Peter Heiduschka
; Björn Kemper
; Jürgen Schnekenburger
; Martin Glud
; Mette Mogensen
; Niels Møller Israelsen
; Ole Bang
; | | Date: |
11 Oct 2020 | | Abstract: | We present the first demonstration of shot-noise limited supercontinuum-based
spectral domain optical coherence tomography (SD-OCT) with axial resolution of
5.9 $mu$m 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 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 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 multi-layer stacks we conclude that supercontinuum-based SD-OCT can
enter the domain of shot-noise limited detection. | | Source: | arXiv, 2010.05226 | | Services: | Forum | Review | PDF | Favorites | |
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