Refractive Index Measurement of Liquids Based on Microstructured Optical Fibers

Photonics

Susana Silva¹  Paulo Roriz¹ 

[1] INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal; E-Mails:

关键词: optical fiber sensors;    microstructured fibers;    refractive index;   

DOI  :  10.3390/photonics1040516

来源: mdpi

【 摘 要 】

This review is focused on microstructured optical fiber sensors developed in recent years for liquid RI sensing. The review is divided into three parts: the first section introduces a general view of the most relevant refractometric sensors that have been reported over the last thirty years. Section 2 discusses several microstructured optical fiber designs, namely, suspended-core fiber, photonic crystal fiber, large-core air-clad photonic crystal fiber, and others. This part is also divided into two main groups: the interferometric-based and resonance-based configurations. The sensing methods rely either on full/selective filling of the microstructured fiber air holes with a liquid analyte or by simply immersing the sensing fiber into the liquid analyte. The sensitivities and resolutions are tabled at the end of this section followed by a brief discussion of the obtained results. The last section concludes with some remarks about the microstructured fiber-based configurations developed for RI sensing and their potential for future applications.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.