Spectral characteristics of helicoidal mechanically-induced long-period fiber grating

Sheng-hui SHI; Ming-fu ZHAO; Bin-bin LUO; Bin TANG; Li-gong CHEN

doi:10.3788/OPE.20172507.1771

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Spectral characteristics of helicoidal mechanically-induced long-period fiber grating

Modern Applied Optics | 更新时间：2020-07-07

- Spectral characteristics of helicoidal mechanically-induced long-period fiber grating
- Optics and Precision Engineering Vol. 25, Issue 7, Pages: 1771-1776(2017)
- 作者机构：
  
  1.重庆理工大学电气与电子工程学院, 重庆 400054
  2.重庆理工大学现代光电检测技术与仪器重点重庆市实验室, 重庆 400054
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172507.1771
  CLC： TN253
- Received：20 February 2017，
  
  Accepted：17 March 2017，
  
  Published：25 July 2017
- 稿件说明：
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Sheng-hui SHI, Ming-fu ZHAO, Bin-bin LUO, et al. Spectral characteristics of helicoidal mechanically-induced long-period fiber grating[J]. Optics and precision engineering, 2017, 25(7): 1771-1776.
DOI：

Sheng-hui SHI, Ming-fu ZHAO, Bin-bin LUO, et al. Spectral characteristics of helicoidal mechanically-induced long-period fiber grating[J]. Optics and precision engineering, 2017, 25(7): 1771-1776. DOI： 10.3788/OPE.20172507.1771.

摘要

利用两个交替放置的周期性V型刻槽板对均匀扭转后的普通单模光纤径向施力制作螺旋型力学微弯长周期光纤光栅（H-MLPFG）。通过实验研究了周期压力和扭转率对该光栅传输谱特性的影响，以及其偏振相关特性。结果表明，施加在光纤的径向压力可以改变H-MLPFG的耦合强度，但不影响其谐振波长变化，LP

耦合模耦合强度在波长1 549.75 nm处为30.1 dB。当光纤扭转率由0增大到5.38 rad/cm，LP

、LP

和LP

模对应的扭转灵敏度分别为1.59、1.82和2.24 nm/（rad·cm

-1

）。光纤扭转率为0.90 rad/cm时，LP

包层模具有最大偏振相关损耗，在波长1 550.45 nm处偏振相关损耗约为6.86 dB，对应的谐振波长分离值为1.4 nm。该方法制作的LPFG模式耦合强度和谐振波长具有可调谐和可重构性的优点、且结构简单，在光纤通信和传感领域具有潜在的应用价值。

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 LP

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 LP

and LP

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 LP

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

Keywords

references

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Related Institution

Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Intelligent Optical Fiber Sensing Technology， Chongqing University of Technology

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Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Intelligent Optical Fiber Sensing Technology, Chongqing University of Technology

Key Laboratory of Modern Measurement Control Technology, Ministry of Education

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