Share Email Print
cover

Proceedings Paper

Q-switched based supercontinuum source towards low-cost ultra-high resolution optical coherence tomography (Conference Presentation)
Author(s): Michael Maria; Ivan Bravo; Thomas Feuchter; Lasse Leick; Peter Moselund; Mark Denninger; Adrian Podoleanu; Ole Bang
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Supercontinuum (SC) light source is certainly one of the best option for ultra-high resolution optical coherence tomography (UHR-OCT). Over the last few years several demonstrations have been done for each commonly used wavelength range [1-2-3]. Nowadays, SC dedicated to UHR-OCT is a mature technology with turn-key commercially available system [4]. The new challenge to answer for SC source is the cost reduction one. In this study, we demonstrate that a Q-switched based SC (QS-SC) could be an alternative to the current state of the art SC based on a Mode-Locked laser (ML-SC). This QS-SC, whose cost is less than 15 % of the ML-SC, offers similar possibilities in terms of bandwidth, beam quality and optical density within the OCT band [5]. We demonstrate the usefulness of such a source by direct comparison with the ML-SC source commonly used. Our study includes a comparison of the pulse to pulse stability of both sources over the OCT wavelength range, where it is shown that the QS-SC is much more stable than the ML-SC. Also, a noise analysis conducted from the OCT point of view shows that the source repetition rate is a key parameter for any SC based OCT system. A comparison of images acquired from biological and non-biological samples is performed with emphasis on their contrast. Our conclusion is that a QS-SC can be used a useful source for UHR-OCT if compromise can be done in terms of speed of the detection unit. Finally, our study has been done at a central wavelength of 1270 nm, however the ultra-broad flat spectrum of the QS-SC makes it an interesting source for the 800 nm or visible range OCT too, opening the door for low-cost multi-band or multi-modal OCT. REFERENCES 1. K. Bizheva, B. Tan, B. MacLelan, O. Kralj, M. Hajialamdari, D. Hileeto, and L. Sorbara, “Sub-micrometer axial resolution OCT for in-vivo imaging of the cellular structure of healthy and keratoconic human corneas,” Biomed. Opt. Express 8, 800-812 (2017). 2. W. Yuan, J. Mavadia-Shukla, J. Xi, W. Liang, X. Yu, S. Yu, and X. Li, "Optimal operational conditions for supercontinuum-based ultrahigh-resolution endoscopic OCT imaging," Opt. Lett. 41, 250-253 (2016). 3. C. Cheung, J. Daniel, M. Tokurakawa, W. Clarkson, and H. Liang, "High resolution Fourier domain optical coherence tomography in the 2 μm wavelength range using a broadband supercontinuum source," Opt. Express 23, 1992-2001 (2015). 4. http://www.nktphotonics.com/lasers-fibers/product/superk-oct-broadband-sources-optical-coherence-tomography/ 5. http://www.nktphotonics.com/lasers-fibers/product/superk-compact-supercontinuum-lasers/

Paper Details

Date Published: 5 April 2018
PDF
Proc. SPIE 10485, Optics and Biophotonics in Low-Resource Settings IV, 104850I (5 April 2018); doi: 10.1117/12.2290605
Show Author Affiliations
Michael Maria, Univ. of Kent (United Kingdom)
Ivan Bravo, Technical Univ. of Denmark (Denmark)
Thomas Feuchter, NKT Photonics A/S (Denmark)
Lasse Leick, NKT Photonics A/S (Denmark)
Peter Moselund, NKT Photonics A/S (Denmark)
Mark Denninger, NKT Photonics A/S (Denmark)
Adrian Podoleanu, Univ. of Kent (United Kingdom)
Ole Bang, Technical Univ. of Denmark (Denmark)


Published in SPIE Proceedings Vol. 10485:
Optics and Biophotonics in Low-Resource Settings IV
David Levitz; Aydogan Ozcan; David Erickson, Editor(s)

© SPIE. Terms of Use
Back to Top