Forty-Four Pass Fibre Optic Loop for Improving the Sensitivity of Surface Plasmon Resonance Sensors

TL;DR

This paper introduces a novel forty-four pass fibre optic surface plasmon resonance sensor that significantly enhances detection sensitivity by recirculating light through a loop multiple times, with potential applications in chemical and biomolecule detection.

Contribution

The paper presents the first implementation of a forty-four pass fibre optic SPR sensor using a recirculation loop to boost sensitivity, overcoming previous limitations.

Findings

Sensitivity increased by a factor of forty-four.

Recirculation loop enables multiple passes without lasing.

Potential for improved chemical and biomolecule detection.

Abstract

A forty-four pass fibre optic surface plasmon resonance sensor that enhances detection sensitivity according to the number of passes is demonstrated for the first time. The technique employs a fibre optic recirculation loop that passes the detection spot forty- four times, thus enhancing sensitivity by a factor of forty-four. Presently, the total number of passes is limited by the onset of lasing action of the recirculation loop. This technique offers a significant sensitivity improvement for various types of plasmon resonance sensors that may be used in chemical and biomolecule detections.