Characterization of Long-period Grating Refractive Index Sensors and Their Applications

Sensors

Hiroshi Tsuda¹ 

关键词: long-period grating;    refractive index;    spectral sensitivity;   

DOI  :  10.3390/s90604559

来源: mdpi

【 摘 要 】

The influence of grating length and bend radius of long-period gratings (LPGs) on refractive index sensing was examined. Sensitivity to refractive indexes smaller than that of silica could be enhanced by bending LPGs. Bent LPGs lost sensitivity to refractive indexes higher than that of silica, whereas a 20-mm-long LPG arranged in a straight line had considerable sensitivity. These experimental results demonstrated that the sensitivity characteristics of LPGs to refractive index could be controlled by grating length and bend radius.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.