Sensing Structure based on Surface Plasmonic Resonance in Single Mode Optical Fibers Chemically Etched

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Coelho, L (Author) Other; Almeida, JM (Author) FCUP; Santos, JL (Author) FCUP; Ferreira, RAS (Author) Other; Andre, PS (Author) Other; Viegas, D (Author) Other

Conference proceedings International

Title: FIFTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

5th European Workshop on Optical Fibre Sensors

Krakow, POLAND, MAY 19-22, 2013

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology > Environmental engineering

Other information

Authenticus ID: P-006-FTM

DOI: 10.1117/12.2026809

Abstract (EN): Many optical systems based on Surface Plasmon Resonance (SPR) have been developed for work as refractometers, chemical sensors or even for measure the thickness of metal and dielectric thin films. These kinds of systems are usually large, expensive and cannot be used for remote sensing. Optical fiber sensors based on SPR has been widely studied for the last 20 years with several configurations mostly using multimode optical fibers with large cores and plastic claddings. Sensors based on SPR present very high sensitivity to refractive index variations when compared to the traditional refractive index sensors. Here we propose a SPR sensor based in a single mode fiber. The fiber end is chemically etched by emersion in a 48% hydrofluoric acid solution, resulting a single mode fiber with the cladding removed in a small section. A resonance dip around 1580 nm was attained in good agreement with the simulation scenario that takes into account the real characteristics of the fiber.

Language: English

Type (Professor's evaluation): Scientific