Numerical and Experimental Characterization of Radiation Mode of 45° Tilted Fiber Grating

Huabao Qin, Qinyun He, Zhikun Xing, Xi Guo, Zhijun Yan, Qizhen Sun, Kaiming Zhou, Hushan Wang, Deming Liu, Lin Zhang

Research output: Contribution to journalArticlepeer-review


In this paper, we have numerically and experimentally investigated the radiation mode of 45° tilted fiber grating (45° TFG). By introducing the axial distributions into the volume current method, we have established a three-dimensional theoretical model to analyze spatial distributions of the radiation mode of 45° TFG, and measured the radiation mode spatial distributions in experiment. Both numerical and experimental results show that the radiation mode of 45° TFG exhibits an exponential reduction along the fiber axial direction, and a quasi-Gaussian profile along the radial direction of fiber. Additionally, we have also measured the detailed polarization-dependent azimuthal intensity distributions of radiation modes of both s-and p-polarized core modes. The degree of polarization of radiation mode is around 99.886%, which is independent of the length and the polarization extinction ratio of the grating. Moreover, for the first time, we have experimentally observed a very weak p-polarized component existing in the radiation mode, which has matched well with the simulation results.

Original languageEnglish
Article number8728142
Pages (from-to)3777-3783
Number of pages7
JournalJournal of Lightwave Technology
Issue number15
Early online date3 Jun 2019
Publication statusPublished - 1 Aug 2019

Bibliographical note

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


  • Exponential distribution
  • fiber gratings
  • fiber optics
  • polarization
  • radiation


Dive into the research topics of 'Numerical and Experimental Characterization of Radiation Mode of 45° Tilted Fiber Grating'. Together they form a unique fingerprint.

Cite this