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Phase-shifted gratings fabricated with femtosecond laser by overlapped two types of fiber Bragg gratings
Optics & Laser Technology ( IF 5 ) Pub Date : 2019-12-09 , DOI: 10.1016/j.optlastec.2019.105969
Xiaoyan Sun , Li Zeng , Haifeng Du , Xinran Dong , Zikun Chang , Youwang Hu , Ji'an Duan

A phase-shifted fiber Bragg grating (PS-FBG) fabricated by femtosecond laser phase mask technique is demonstrated. The PS-FBG fabricated by overlapped two types of fiber Bragg gratings (FBGs), which is a normal FBG and a titled fiber Bragg grating (TFBG). They are inscribed one over the other on the same section in a single-mode fiber. We researched the effect of different tilt angles to the Bragg wavelength of TFBG. The intensity and wavelength of PS-FBGs can be changed by controlling tilt angles. The method has advantages of simple and efficient fabrication as well as high-quality spectrum. Meanwhile it has a good repeatability. Additionally, the strain and temperature sensitivities of the 0° + 3° PS-FBG are experimentally measured, which are 0.867 pm/με and 14.91 pm/℃, respectively.



中文翻译:

用飞秒激光重叠两种光纤布拉格光栅制成的相移光栅

演示了通过飞秒激光相位掩膜技术制造的相移光纤布拉格光栅(PS-FBG)。由两种类型的光纤布拉格光栅(FBG)重叠而成的PS-FBG,这两种光纤布拉格光栅是普通FBG和标题为光纤布拉格光栅(TFBG)的光纤。它们在单模光纤的同一部分上彼此刻写。我们研究了不同倾斜角对TFBG布拉格波长的影响。PS-FBG的强度和波长可以通过控制倾斜角来改变。该方法具有简单有效的制造以及高质量光谱的优点。同时具有良好的重复性。另外,通过实验测量了0°+ 3°PS-FBG的应变敏感性和温度敏感性,分别为0.867 pm /με和14.91 pm /℃。

更新日期:2019-12-09
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