Tailoring Chirp Characteristics of Waveguide Bragg Gratings Using Tapered Core Profiles
Tailoring Chirp Characteristics of Waveguide Bragg Gratings Using Tapered Core Profiles
复制标题
使用锥形芯轮廓定制波导布拉格光栅的线性调频特性
DOI：
--
复制
发表时间：
2006
影响因子：
2.6
通讯作者：
Kidong Lee
中科院分区：
文献类型：
--
作者：
Min;J. Ju;S. Park;Myung;S. H. Kim;Kidong Lee
我们提出并演示了锥形芯轮廓的设计原理，用于定制具有均匀光栅周期的波导布拉格光栅（WBG）器件的啁啾特性。基于数值和实验方法，我们建立了模态有效指数对纤芯宽度的依赖性。然后，我们设计和制造具有针对线性群延迟优化的锥度轮廓的聚合物 WBG 器件以及具有线性锥度的器件。尽管由于结构不完整，它们在光谱响应中表现出高纹波，但它们的线性调频特性很好地符合预期的群延迟曲线
We propose and demonstrate the design principle of tapered core profiles for tailoring the chirp characteristics of waveguide Bragg grating (WBG) devices with uniform grating periods. Based on both numerical and experimental approaches, we establish the dependence of the modal effective index on the core width. We then design and fabricate polymeric WBG devices with a taper profile optimized for a linear group delay and those with a linear taper as well. Although they exhibit high ripples in their spectral responses due to incomplete structures, their chirp characteristics fit well the expected group delay curves