光纖與矽光子導線高效率耦合器之研究

Study of High Efficiency Couplers between Optical Fibers and Silicon Photonic Wires

謝佳運(Jia-Yun Hsieh)

指導教授 ： 黃鼎偉

國立臺灣大學/電機資訊學院/光電工程學研究所/碩士(2007年)

https://doi.org/10.6342/NTU.2007.01690

摘要

本篇論文介紹了許多最近以矽為基底的光子導線之發展。因此針對通訊波段，我們提出了一個緊密且高效能的光柵耦合器，可以將光纖內的訊號垂直打入，耦合至平面波導中。但問題在於光纖與光子導線的模態尺寸及形狀都差異過大。因此我們設計了一個長方形的傾斜光柵，並把它埋入高折射率的波導核心中。除此之外，為了防止光纖的訊號反射回光纖中，我們也將光纖稍微傾斜打入波導中並分析最後的耦合效能。我們使用模擬軟體R-Soft來模擬許多前人所提出來的各種方法，並將結果與本篇論文所提出的架構比較，最後我們將試著找出此架構的最佳解。

關鍵字

矽光子導線 ； 光柵耦合器 ； 平面波導 ； 光纖 ； 傾斜光柵 ； 積體光學

並列摘要

This thesis presents recent approaches in the development of a Si-based waveguides system for submicrometer devices. A compact and efficient grating coupler for tilt-incident with respect to the vertical axis coupling between optical fibers and silicon photonic wires is proposed. One of the drawbacks of the high index contrast is the large mismatch in mode size and shape between fibers and silicon photonic wires. Hence, a slanted grating with a parallelogram shape is designed through the entire high-index waveguide core. Otherwise, the optical fiber is slightly tilted in order to prevent a reflection and its coupling efficiency will be analyzed. We use R-Soft to simulate various approaches and compare them with slanted grating, and finally we try to find the best solutions.

並列關鍵字

silicon photonic wire ； grating coupler ； planar waveguide ； fiber ； slanted grating ； integrated optics

參考文獻

Takahashi, Mitsutoshi Takahashi, Tetsufumi Shoji, Emi Tamechika, Sei-ichi

Itabashi, and Hirofumi Morita, “Microphotonics Devices Based on Silicon

232-240, Jan./Feb. 2005.

for Vertical Coupling Between Fibers and Silicon-on-Insulator Planar

[5] F. Van Laere, G. Roelkens, J. Schrauwen,D. Taillaert, P. Dumon, W. Bogaerts, D. Van Thourhout and R. Beaets, “Compact grating couplers between optical fibers and Silicon-on-Insulator photonic wire waveguides with 69% coupling efficiency,” OFC 2006, p. PDP15, United States, 2006.