Highly sensitive and selective optical fiber fluorescence sensor for lead ion detection in water using corrugated long period fiber grating

Yasser Chiniforooshan; Jianjun Ma; Wojtek J. Bock; Wenhui Hao; Zhi Yuan Wang

doi:10.1117/12.2059737

2 June 2014 Highly sensitive and selective optical fiber fluorescence sensor for lead ion detection in water using corrugated long period fiber grating

Yasser Chiniforooshan, Jianjun Ma, Wojtek J. Bock, Wenhui Hao, Zhi Yuan Wang

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91575C (2014) https://doi.org/10.1117/12.2059737
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Optical fiber fluorescence sensors are widely used for chemical sensing. Intrinsic fluorescence sensors such as evanescent-wave sensors can be used for surface sensing while extrinsic sensors are used for bulk sensing. In intrinsic/ extrinsic fluorescence sensors, typically the side-wall/end-face of a single/multi-mode fiber is used. In this paper we introduce a novel intrinsic optical fiber fluorescence sensor which uses the side-wall of a large-core multi-mode fiber to collect the fluorescence from the bulk of samples. The method is to use a corrugated long period fiber grating, fabricated by a CO2 laser, to couple radiating modes to the core modes. Using the side-wall of a fiber helps to fabricate a multitarget or a distributed sensor. We also report the sensing of lead ions with concentration as low as few ppb in water using a novel fluorescence turn-on polymer as a chemical probe.

Citation Download Citation

Yasser Chiniforooshan, Jianjun Ma, Wojtek J. Bock, Wenhui Hao, and Zhi Yuan Wang "Highly sensitive and selective optical fiber fluorescence sensor for lead ion detection in water using corrugated long period fiber grating", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91575C (2 June 2014); https://doi.org/10.1117/12.2059737

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