Improvement in refractive index sensitivity by means of internally curved long period fiber gratings

被引：1
|
作者：
Chiavaioli, F. [1 ]
Trono, C. [1 ]
Baldini, F. [1 ]
机构：
[1] CNR, Inst Appl Phys, I-50019 Sesto Fiorentino, FI, Italy
来源：
23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷
关键词：
long period fiber grating; specially designed profile; internally tilted grating plane; refractive index sensitivity;
D O I：
10.1117/12.2059691
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel configuration of long period fiber grating (LPFG), based on a specially designed refractive index (RI) profile, was manufactured and studied. The internally manufactured geometric structure is characterized by grating planes tilted at increasing angles, as moving away from the center of symmetry of the structure towards its both edges. This structure reproduces the bending of an optical fiber and improves the RI sensitivity of an LPG to the external surrounding medium. A three-fold enhancement in the RI sensitivity was experimentally proved, thus giving a further contribution towards the development of more sensitive RI sensors based on optical fiber LPGs.
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页数：4
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