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Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation
Q. Guo; Z. M. Zheng; B. Wang; X. P. Pan; S. R. Liu; Z. N. Tian; C. Chen and Y. S. Yu
2021
发表期刊Photonics
卷号8期号:4页码:9
摘要In this paper, an energy regulation method based on the combination of a half-wave plate (HWP) and a polarization beam splitter (PBS) is proposed for the fabrication of apodized fiber gratings, which can effectively improve the side lobe suppression ratio of high-reflectivity fiber Bragg gratings (FBGs) fabricated by femtosecond laser. The apodized FBGs prepared by this method has good repeatability and flexibility. By inputting different types of apodization functions through the program, the rotation speed of the stepping motor can be adjusted synchronously, and then the position of the HWP can be accurately controlled so that the laser energy can be distributed as an apodization function along the axial direction of the fiber. By using the energy apodization method, the gratings with a reflectivity of 75% and a side lobe suppression ratio of 25 and 32 dB are fabricated in the fiber with a core diameter of 9 and 4.4 mu m, respectively. The temperature and strain sensitivities of the energy-apodized fiber gratings with a core diameter of 4.4 mu m are 10.36 pm/degrees C and 0.9 pm/mu epsilon, respectively. The high-reflectivity gratings fabricated by this energy apodization method are expected to be used in high-power narrow-linewidth lasers and wavelength division multiplexing (WDM) systems.
DOI10.3390/photonics8040110
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文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/65248
专题中国科学院长春光学精密机械与物理研究所
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Q. Guo,Z. M. Zheng,B. Wang,et al. Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation[J]. Photonics,2021,8(4):9.
APA Q. Guo.,Z. M. Zheng.,B. Wang.,X. P. Pan.,S. R. Liu.,...&C. Chen and Y. S. Yu.(2021).Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation.Photonics,8(4),9.
MLA Q. Guo,et al."Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation".Photonics 8.4(2021):9.
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