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/multimode fiber is used. In this paper, we introduce a novel intrinsic optical fiber fluorescence sensor which uses the side-wall of a large-core multimode fiber to collect the fluorescence from the bulk of samples. The method is to use a corrugated fiber grating, fabricated by a CO2 laser, to couple radiating modes to the core modes. Using the sidewall 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 fluorescence turn-on polymer as a chemical probe.

© 2014 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription