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| 倾角对倾斜光纤光栅光谱特性的影响 |
| Effect of tilted angle on spectral characteristics of titled fiber grating |
| 投稿时间：2014-10-25 |
| DOI：10.3969/j.issn.1005-5630.2015.04.012 |
| 中文关键词: 倾斜光纤光栅 倾斜角度 光谱特性 |
| 英文关键词:titled fiber Bragg grating titled angle spectral characteristics |
| 基金项目:国家自然科学基金资助项目(51374072) |
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| 中文摘要: |
| 基于倾斜光纤光栅模式耦合理论,研究了倾斜角度对光纤光栅光谱特性的影响,并应用OptiGrating 软件进行数值模拟仿真。通过对不同倾斜角度得到的光纤光栅反射谱及透射谱的研究发现,随光栅倾角的增大,布拉格波长的中心波长偏移,同时反射率下降,而包层模式耦合增强,透射损耗变大,群时延减小。仿真结果对光纤光栅的设计和优化有一定的指导意义。 |
| 英文摘要: |
| Based on the mode coupling theory, the effect of titled angle on the characteristics of spectrum of fiber grating is proposed. The numerical modeling method is performed by using the software, OptiGrating.By considering the reflection and the transmission spectra, we find that the central wavelength shifts to the long-wave band, the reflectivity of Bragg wavelength decreases, the cladding mode couplings are enhanced,the transmittance becomes larger,and the group delay decreases intensely with the increase of the titled angles. This conclusion provides a theoretical guidance for the design and optimization of fiber grating. |
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