渐变光栅区长度和形状对双锥型FBG光谱特性的影响
发布时间：2018-12-13 18:49
【摘要】：提出一种双锥型光纤光栅(FBG),利用传输矩阵方法分析了其渐变光栅区长度和形状对光栅反射谱的影响规律。研究表明:随着渐变光栅区长度的增大,两主峰中间的次级峰幅值按不同比例增大,中间部分比例大,两侧比例小。当渐变光栅区长度增大1个数量级后,中间次峰有明显的交联趋势,随着长度进一步增大,中间次峰完全连接在一起,并与两个主峰等幅变化;渐变光栅区为线性和指数两种形状时,双锥型FBG光谱分布几乎相同,而当渐变光栅区为抛物线形状时,各次级峰右移至右侧主峰两侧,且幅度以主峰为中心逐渐降低。利用实验初步验证了理论分析的正确性。
[Abstract]:A double cone fiber grating (FBG),) is proposed to analyze the effect of the length and shape of the gradient grating region on the reflectance spectrum of the grating by using the transfer matrix method. The results show that with the increase of the length of the gradient grating region, the amplitude of the secondary peak in the middle of the two main peaks increases in different proportions, the proportion of the middle part is large and the ratio of the two sides is small. When the length of the gradient grating region increases by one order of magnitude, the intermediate sub-peak has obvious cross-linking trend. With the further increase of the length, the intermediate sub-peak is completely connected together, and the same amplitude changes with the two main peaks. When the gradient grating region is linear and exponential, the double cone FBG spectrum distribution is almost the same, but when the gradient grating region is parabola shape, the secondary peaks move to the right side of the main peak, and the amplitude decreases gradually with the main peak as the center. The correctness of the theoretical analysis is preliminarily verified by experiments.
【作者单位】： 宁波工程学院电子与信息工程学院;上海出入境检验检疫局;
【基金】：浙江省自然科学基金(Q14A040006) 宁波市自然科学基金(2015A610115,2015A610081)资助项目
【分类号】：TN253
[Abstract]:A double cone fiber grating (FBG),) is proposed to analyze the effect of the length and shape of the gradient grating region on the reflectance spectrum of the grating by using the transfer matrix method. The results show that with the increase of the length of the gradient grating region, the amplitude of the secondary peak in the middle of the two main peaks increases in different proportions, the proportion of the middle part is large and the ratio of the two sides is small. When the length of the gradient grating region increases by one order of magnitude, the intermediate sub-peak has obvious cross-linking trend. With the further increase of the length, the intermediate sub-peak is completely connected together, and the same amplitude changes with the two main peaks. When the gradient grating region is linear and exponential, the double cone FBG spectrum distribution is almost the same, but when the gradient grating region is parabola shape, the secondary peaks move to the right side of the main peak, and the amplitude decreases gradually with the main peak as the center. The correctness of the theoretical analysis is preliminarily verified by experiments.
【作者单位】： 宁波工程学院电子与信息工程学院;上海出入境检验检疫局;
【基金】：浙江省自然科学基金(Q14A040006) 宁波市自然科学基金(2015A610115,2015A610081)资助项目
【分类号】：TN253
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