Highly Sensitive Optical Refractometer Based on Edge-Written Ultra-Long-Period Fiber Grating Formed by Periodic Grooves

Author

Zhu, Tao ; Song, Yun ; Rao, Yunjiang ; Zhu, Yong

Author_Institution

Key Lab. of Optoelectron. Technol. & Syst., Chongqing Univ., Chongqing

Volume

9

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

678

Lastpage

681

Abstract

An ultra-long-period fiber grating with periodic groove structure (G-ULPFG) fabricated by using an edge-written method with high-frequency CO₂ laser pulses is proposed in this paper. The experimental results show that the different resonant peaks of the G-ULPFG have different temperature and refractive index sensitivities and, in particular, the refractive index sensitivity is much larger than that of conventional ULPFG due to the edge-groove structure. Such a kind of G-ULPFGs could be used as a highly sensitive optical refractometer with temperature self-compensation.

Keywords

diffraction gratings; optical fibres; periodic structures; refractive index; refractometers; edge-groove structure; edge-written ultralong-period fiber grating; optical refractometer; periodic groove structure; refractive index; Fiber gratings; Fiber lasers; Optical pulses; Optical refraction; Optical sensors; Optical variables control; Periodic structures; Refractive index; Resonance; Temperature sensors; Groove structure; optical fiber sensing; refractometer; ultra-long-period fiber grating;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2009.2021187

Filename

4907300