Dr. Simon Toft Sørensen Profile

Dr. Simon Toft Sørensen

Researcher at Tyndall National Institute

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 11 August 2023 Paper

Towards a flexible polarimetric camera-on-tip miniature endoscope for 3x3 Mueller matrix measurements of biological tissue

Lorenzo Niemitz, Simon Sorensen, Yineng Wang, Walter Messina, Ray Burke, Stefan Andersson-Engels

Proceedings Volume 12627, 1262733 (2023) https://doi.org/10.1117/12.2670607

KEYWORDS: Cameras, Polarizers, Polarimetry, Light sources and illumination, Mueller matrices, Endoscopes, Polarization, Tissues, Design and modelling, Imaging systems

Read Abstract +

The interrogation of polarisation state of light is a developing technique in biomedical imaging. As polarised light interacts with structural changes in tissue, it has seen use in differentiation between (pre)cancerous and noncancerous tissue, for example. In biomedical imaging rapid diagnostics using minimally invasive techniques is desirable. Endoscopy is already very prevalent in medicine and therefore miniaturisation of polarimetry systems onto endoscopic platforms is a natural development. Flexibility of such a device allows navigation to more complicated parts of the body. All polarimetric systems consist of a polarisation state generator (PSG) and a polarisation state analyser (PSA) which need to be integrated into such a system. A rigid endoscope capable of imaging a full 4×4 Mueller matrix has been developed by Qi et al. This endoscope achieves the polarisation state generation a rigid rotating sheath. Partial polarimetric endoscopy which captures a 3×3 Mueller matrix has also been demonstrated and is easier to achieve since it does not require quarter wave plates in the generator or analyser. Clancy et al and Qi et al both demonstrate a rigid polarimetric endoscopy using a stereo endoscope and a standard rigid endoscopy, respectively. Integration of polarisation state analyser and generator into the tip has been demonstrated using complex mechanical designs. However questions have been raised regarding the electromagnetic compatibility of such a system due to the presence of motors in the tip. Forward et al present a flexible 3×3 fibre based probe that uses diced polarisers orientated at the horizontal, vertical, and -45 degree positions to generate and acquire the necessary polarisation states. This work presents an imaging probe designed to enable in-vivo polarimetry measurements using a micro camera on the tip as a sensor. A 3×3 Mueller matrix image of crossed linear polarisers, captured using a micro camera is demonstrated. This device demonstrates the potential of micro camera sensors in providing 2-dimensional polarimetry data in a flexible endoscopic system. For a device to be used in a clinical setting it needs to be capable of providing data rapidly when it is needed, as well as being navigable to the target location. A fibre optically illuminated endoscope with micro-camera sensor allows for rapid switching of illumination fibres using backend illumination systems as well as rapid acquisition of data. Optical fibres enable the probe to be rigid or flexible depending on application, and the camera at the tip ensures consistent image quality regardless of application area. An idealised system and its potential future of polarimetry in translational biophotonic devices is also discussed.

Proceedings Article | 30 June 2022 Open Access

Biophotonics box: educational kit for multidisciplinary outreach activities in optics and photonics

Marcelo Nogueira, Katarzyna Komolibus, Andrea Tobo, Baptiste Jayet, Sanathana Konugolu Venakata Sekar, Simon Sørensen, Caitriona Tyndall, Stefan Andersson-Engels

Proceedings Volume 12297, 122972L (2022) https://doi.org/10.1117/12.2635595

KEYWORDS: Biomedical optics, Photonics, Computer simulations, Scanning transmission electron microscopy, Medicine, Luminescence, Light scattering, Electronic components, Education and training, Biology

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 7 March 2019 Paper

Design and packaging of a compact entangled-photon source for space quantum key distribution

D. Bremner, S. Lee, W. Dorward, S. Robertson, L. Caspani, S. Sørensen, L. McKnight

Proceedings Volume 10896, 108961J (2019) https://doi.org/10.1117/12.2513290

KEYWORDS: Quantum key distribution, Crystals, Packaging, Phase matching, Polarization, Satellites, Photon polarization, Single photon, Optical filters, Computer programming

Read Abstract +

Proceedings Article | 14 May 2018 Paper

Simultaneous distributed temperature and disturbance sensing in single-mode fibre for power cable monitoring

Simon Sørensen, Andy Shanks, Elaine Buck, Henry Bookey

Proceedings Volume 10654, 106540Y (2018) https://doi.org/10.1117/12.2304379

KEYWORDS: Temperature metrology, Sensing systems, Single mode fibers, Calibration, Rayleigh scattering, Refractive index, Remote sensing, Raman scattering

Read Abstract +

Proceedings Article | 15 February 2018 Presentation + Paper

Vibration-tolerant narrow-linewidth semiconductor disk laser using novel frequency-stabilisation schemes

Craig Hunter, Brynmor Jones, Peter Schlosser, Simon Toft Sørensen, Michael Strain, Loyd McKnight

Proceedings Volume 10515, 105150Q (2018) https://doi.org/10.1117/12.2286063

KEYWORDS: Fabry–Perot interferometers, Laser applications, Semiconductor lasers, Disk lasers, Laser stabilization, Laser resonators, Semiconductors

Read Abstract +

Proceedings Article | 5 March 2013 Paper

New horizons for supercontinuum light sources: from UV to mid-IR

Carsten Thomsen, Frederik Nielsen, Jeppe Johansen, Christian Pedersen, Peter Moselund, Uffe Møller, Simon T. Sørensen, Casper Larsen, Ole Bang

Proceedings Volume 8637, 86370T (2013) https://doi.org/10.1117/12.2008860

KEYWORDS: Mid-IR, Supercontinuum sources, Fiber lasers, Solitons, ZBLAN, Ultraviolet radiation, Mode locking, Light sources, Photonics, Continuous wave operation

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years