| Mode characteristics of hollow core Bragg fiber |
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| 作者姓名： | 季敏宁 石志东 郭强 |
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| 作者单位： | Institute of Fiber Optics，Institute of Fiber Optics，Institute of Fiber Optics Shanghai University，Shanghai 201800，Shanghai University，Shanghai 201800，Shanghai University，Shanghai 201800 |
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| 基金项目： | This work was supported by the National Postdoctoral Research Funds (No. 2003034255) and the National Nat-ural Science Foundation of China (No. 60177026). |
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| 摘 要： | Analytical expression to calculate propagation constant and mode field of the hollow core Bragg fiber is derived. Numerical results are presented. It is shown that the fundamental mode of the hollow core Bragg fiber is circularly symmetric TE01 mode with no polarization degeneracy, while the higher order mode may be HE11, TM01, or TEo2 etc.. This property is different from conventional optical fiber that its fundamental mode is the linearly polarized HE11 mode and is polarization degeneracy.
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