| Study and Design of Spiral Bent Waveguide Configuration |
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| 作者姓名： | ZENG Wen-hong LIAO Yun SHI Shuang-jin QIU Qi LI Wei |
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| 作者单位： | [1]School of Optoelectronic Information [2]Key Laboratory of Broadband Optical Fiber Transmission and Communication Network, Ministry of Education of China, University of Electronic and Science Technology of China, Chengdu 610054, CHN |
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| 摘 要： | A new version of the scalar transverse electric（TE） wave equation in the bent waveguide is introduced. Then. TE polarized field in curved single-mode waveguides is analyzed by using the finite- difference beam propagation method（FD-BPM）. The bending loss in bent waveguides is gotten for the optical fields obtained from BPM and comparisons are made among losses of the waveguides with various curvature radiuses, refractive index differences and cross sections. Based on the results, the design of spiral bent waveguide configuration is proposed as follows： refractive index difference being of 0. 007, both width and thickness of waveguides being of 6 μm, the curvature radius in the spiral centre being of 4 mm, and the bending loss coefficient of the designed spiral bent waveguide being of 0. 302 3 dB/cm.
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| 关 键 词： | 螺旋弯曲波导 构型 设计 边界条件 |
| 文章编号： | 1007-0206（2007）02-0112-05 |
| 收稿时间： | 2006-12-02 |
| 修稿时间： | 2007-02-02 |
Study and Design of Spiral Bent Waveguide Configuration |
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| ZENG Wen-hong LIAO Yun SHI Shuang-jin QIU Qi LI Wei.Study and Design of Spiral Bent Waveguide Configuration[J].Semiconductor Photonics and Technology,2007,13(2):112-116. |
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| Authors: | ZENG Wen-hong LIAO Yun SHI Shuang-jin QIU Qi LI Wei |
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| Abstract: | A new version of the scalar transverse electric(TE) wave equation in the bent waveguide is introduced.Then,TE polarized field in curved single-mode waveguides is analyzed by using the finite-difference beam propagation method(FD-BPM).The bending loss in bent waveguides is gotten for the optical fields obtained from BPM and comparisons are made among losses of the waveguides with various curvature radiuses,refractive index differences and cross sections.Based on the results,the design of spiral bent waveguide configuration is proposed as follows:refractive index difference being of 0.007,both width and thickness of waveguides being of 6 μm,the curvature radius in the spiral centre being of 4 mm,and the bending loss coefficient of the designed spiral bent waveguide being of 0.302 3 dB/cm. |
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| Keywords: | finite differential beam propagation method transparent boundary condition effective index method bent waveguide |
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