Micro-Displacement Sensor Based on a Hollow-Core Photonic Crystal Fiber

Sensors

Ana Margarida Rodrigues Pinto²  José Manuel Baptista¹  José Luís Santos¹  Manuel Lopez-Amo² 

[1] Instituto de Engenharia de Sistemas e Computadores do Porto (INESC Porto), Departamento de Física, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal; E-Mails:;Departamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona-Navarra, Spain; E-Mail:

关键词: fiber optic sensor;    photonic crystal fiber;    micro-displacement sensor;    modal interferometer;   

DOI  :  10.3390/s121217497

来源: mdpi

【 摘 要 】

A sensing head based on a hollow-core photonic crystal fiber for in-reflection measurement of micro-displacements is presented. The sensing structure takes advantage of the multimodal behavior of a short segment of hollow-core photonic crystal fiber in-reflection, being spliced to a single mode fiber at its other end. A modal interferometer is obtained when the sensing head is close to a mirror, through which displacement is measured.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland