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  • 學位論文

積體光學高分子波導光塞/去多工耦合濾波器之研究

An Investigation of Integrated Optics OADM Coupler/Filter based on Polymeric Waveguide

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摘要


隨著電信的快速發展,光通訊被認為是其中一個重要的因素。尤其是,高密度分波多工器的多工技術是預計達到兆位元傳輸率的通信系統。過去,光塞取多工器加入光柵被認為是一種先進的技術來製作微環共振多工器,聲光過濾器/耦合器,法比- 培羅特濾波器等。本文介紹了一種光學不對稱光柵高分子波導耦合/濾波器,它從全像干涉的原理操作布拉格光柵反射。謹慎地進行製程。我們做了耦合模態理論(CMT),傳輸矩陣相結合的方法來充分的說明非對稱高分子波導耦合/過濾器,包括穿透,反射光譜,以及插入損耗的特點。作者還通過部分地調查了一些因素,如折射率,光柵高度,這些被認為是影響元件性能主要原因,經由光柵週期的長度推導也證明了優化設計的推論。最後,在理論分析的結果是由實驗程現,用Ormo-Core, OG 198, OG 142和Omo-Stamp高分子材料與不同參數驗證。此外,全像干涉技術,微成型製程和軟式微影技術的採用,為主要的製造流程。這些類型的波導衍射光柵型耦合/濾波器的可廣泛用於波長分波多工/高密度分波多工(WDM/ DWDM)網路以及積體光學。在製造過程中,耦合器/過濾裝置是基於非對稱耦合器的布拉格結構使用兩個不同的材料製作導光層。從輸出光譜尖銳的波形可以看出耦合/濾波器的高反射率。另外,L波段濾波器,其2條波導的導光層是相同的材料, 製作出反射為22 dB的輸出,波峰約在1618.7奈米,有效頻寬為5奈米。

並列摘要


With the rapid development of telecommunications, optical communication is considered as one of the important factors. Especially, wavelength division multiplexer/ dense wavelength multiplexer techniques are expected to gain the tera-bit-rate communication systems. Before, optical add/drop multiplexing (OADM) devices assisted grating was known as an advanced technique to fabricate multiplexer components beside micro-ring resonant, acousto-optics filter/ coupler, Fabry-Perot filter, etc. This thesis describes an optical asymmetric Bragg grating polymeric-based waveguide couple/filter which operates on the principle of Bragg grating reflection from corrugated structure. A detail design analysis is implemented. We did analyze the coupled mode theory (CMT) combining with transfer matrix method to illustrate adequately characteristics of asymmetric polymeric-based waveguide coupler/filter, including transmission, reflection spectra, and insertion losses. The author also demonstrate an optimize design by partially investigating the derivation of some factors such as refractive index, height of grating, and the length of grating period which are considered as main features affected to device’s performance. Finally, the theoretical analysis results are verified by experimental fabrication realized on Omo-Core, OG 198, OG 142 and Omo-Stamp polymeric materials with different indices. Also, holographic interference techniques, micro molding process and soft lithography techniques are employed as main fabrication processes. These types of waveguide grating-based couple/filter can widely be used for wavelength division multiplexing/ dense wavelength division multiplexing (WDM/DWDM) network and integrated optics as well. In fabrication processes, the coupler/filter device was fabricated based on an asymmetric Bragg coupler structure and two cores different materials. The output spectra performed a high reflectivity and sharp roll-off band of coupler/filter .In addition, a L-band filter, whose two waveguide cores are the same materials, was produced with output reflectivity of 22 dB at wavelength around 1618.7 nm with a 3 dB bandwidth of 5 nm.

參考文獻


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