Beam shaping the evanescent field for distributed fluorescence-based optical fibre sensing
Date
2025
Authors
Warren-Smith, S.C.
Li, X.
Cordeiro, C.M.B.
Otten, D.E.
Lancaster, D.G.
Ebendorff-Heidepriem, H.
Nguyen, L.V.
Editors
Santos, J.L.
Sainz, M.L.A.
Sun, T.
Sainz, M.L.A.
Sun, T.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Proceedings of the 29th International Conference on Optical Fiber Sensors (OFS29), as published in Proceedings of SPIE, 2025 / Santos, J.L., Sainz, M.L.A., Sun, T. (ed./s), vol.13639, pp.1363917-1-1363917-4
Statement of Responsibility
S. C Warren-Smith, X. Li, C. M. B. Cordeiro, Dale E. Otten, David G. Lancaster, H. Ebendorff-Heidepriem, and L. V. Nguyen
Conference Name
29th International Conference on Optical Fiber Sensors (OFS) (25 May 2025 - 30 May 2025 : Porto, Portugal)
Abstract
High resolution distributed chemical and biological sensing will enable new discoveries in biological and biomedical applications. Single-point chemical and biological optical fibre sensors often utilise fluorescence-based approaches, which allows high sensitivity and specificity. Achieving distributed sensing at a biologically relevant resolution (< cm) is hindered by the incoherent nature of fluorescence emission. Wavefront shaping of the excitation light in a multimode exposed-core microstructured optical fibre is a promising technique to enhance spatial selectivity by controlling the fluorescence excitation region. This paper gives proof-of-concept numerical and experimental results where we enhance the evanescent field at selected locations along the fibre, and discuss the potential for enhancement by using multi-photon fluorescence.
School/Discipline
Dissertation Note
Provenance
Description
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Rights
© 2025 SPIE