光学精密工程2017，Vol.25Issue(7)：1771-1776,6.DOI:10.3788/OPE.20172507.1771
扭转螺旋型力学微弯长周期光纤光栅的光谱特性
Spectral characteristics of helicoidal mechanically-induced long-period fiber grating
摘要
Abstract
A helicoidal mechanically-induced long-period fiber grating (H-MLPFG)was formed by pressing a twisted fiber from two sides with two V-shaped identical periodically grooved plates.The influence of periodical pressure and twist rate on transmission spectrum of the H-MLPFG were investigated experimentally,together with the polarization characteristics.The results show that the depth of the coupling strength varies with the amount of pressure applied to the fiber,otherwise the resonant wavelength of the H-MLPFG is independent of it.The peak coupling strength of LP13 mode coupling is 30.1 dB at 1 549.75 nm.Twist sensitivities of the H-MLPFG is 1.59,1.82 and 2.24 nm/(rad · cm-1) for LP11,LP12 and LP13 mode couplings respectively when the twist rates increase from 0 to 5.38 rad/cm.The maximum PDL is approximately 6.86 dB at 1 550.45 nm for LP13 cladding mode and the corresponding resonant wavelength separation value is 1.4 nm.The H-MLPFG exhibits merits of tunable and reconstructable for coupling strength and resonant wavelength,simple and easy operation,thus has potential applications in fields of fiber-optic communications and fiber-optic sensing.关键词
光纤光学/长周期光纤光栅/微弯效应/光弹效应/扭转Key words
fiber optics/long period fiber grating/micro-bend effect/photo-elastic effect/twist分类
信息技术与安全科学引用本文复制引用
石胜辉,赵明富,罗彬彬,汤斌,陈立功..扭转螺旋型力学微弯长周期光纤光栅的光谱特性[J].光学精密工程,2017,25(7):1771-1776,6.基金项目
国家自然科学基金资助项目(No.61505017) （No.61505017）
重庆市教委科学技术研究项目(No.KJ1709192 （）
KJ1709211) （）
重庆市科委前沿与应用基础研究计划一般项目(No.cstc2014jcyjA0081 （）
cstc2015jcyjA40035) （）
中国博士后基金资助项目(No.2016M592649) （No.2016M592649）
重庆理工大学青年科研项目星火支持计划(No.2015XH05) （No.2015XH05）
