Shot-noise Limited, Supercontinuum-based Optical Coherence Tomography

Overview

Journal Light Sci Appl

Publisher Springer Nature

Date 2021 Jun 29

PMID 34183643

Citations 15

Authors

Shreesha Rao D S

Mikkel Jensen

Lars Gruner-Nielsen

Jesper Toft Olsen

Peter Heiduschka

Bjorn Kemper

Jurgen Schnekenburger

Martin Glud

Mette Mogensen

Niels Moller Israelsen

Ole Bang

Affiliations

Soon will be listed here.

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.

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