Ultrafast-laser-ablation-assisted spatially selective attachment of fluorescent sensors onto optical fibers

Vikram Kamaljith, Michael G. Tanner, Harry A. C. Wood, Kerrianne Harrington, Debaditya Choudhury, Mark Bradley, Robert R. Thomson

Research output: Contribution to journalArticle

Abstract

A robust method to selectively attach specific fluorophores onto the individual cores of a multicore fiber is reported in this Letter. The method is based on the use of ultrafast laser pulses to nanostructure the facet of the fiber core, followed by amine functionalization and sensor conjugation. This surface-machining protocol not only enables precise spatial selectivity, but it also facilitates high deposition densities of the sensor moieties. As a proof of concept, the successful deposition of three different fluorophores onto selected cores of a multicore fiber is demonstrated. The protocol was developed to include attachment of a fluorescence-based pH sensor using the ratiometric carboxynapthofluorescein.
Original languageEnglish
Pages (from-to)2716-2719
Number of pages4
JournalOptics Letters
Volume45
Issue number10
Early online date14 Feb 2020
DOIs
Publication statusPublished - 15 May 2020

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