Ultra-sensitive fluorescence detection based on helical micro optical fiber

Qinnan Chen; Xuecui Mei; Ke Fang; Daoheng Sun

doi:10.1117/12.2505442

12 December 2018 Ultra-sensitive fluorescence detection based on helical micro optical fiber

Qinnan Chen, Xuecui Mei, Ke Fang, Daoheng Sun

Proceedings Volume 10848, Micro-Optics and MOEMS; 108480B (2018) https://doi.org/10.1117/12.2505442
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

A simple fabrication method of helical micro optical fibers (HMOFs) with controllable diameters and pitches based on micro-Weissenberg effect is proposed in this Letter. Single fibers with minimum diameter and pitch of 5 μm and 15 μm were directly written by near-field electrospinning of molten poly(methyl methacrylate) (PMMA). The morphology and transmission characteristics of single PMMA HMOFs were experimentally measured. The results showed that HMOFs have periodic modulation effect on transmitted light and show its potential as a micro-displacement sensor. Then a fluorescence detection structure based on HMOF is proposed, where HMOF was used to incoming the excitation light and collecting fluorescence. Experimental results show that for the fluorescence sensing of R6G aqueous solution, the fluorescence collection efficiency of HMOF was 4 times that of the micro optical fibers of the same diameter.

Citation Download Citation

Qinnan Chen, Xuecui Mei, Ke Fang, and Daoheng Sun "Ultra-sensitive fluorescence detection based on helical micro optical fiber", Proc. SPIE 10848, Micro-Optics and MOEMS, 108480B (12 December 2018); https://doi.org/10.1117/12.2505442

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