NDLI: Design of Double Series-Coupled Quantum Well Microring Wavelength Selective Switch Using Vernier Effect

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Design of Double Series-Coupled Quantum Well Microring Wavelength Selective Switch Using Vernier Effect

Content Provider	Semantic Scholar
Author	Hayasaka, Nobuyuki
Copyright Year	2014
Abstract	【素子設計】設計を行った2次直列結合異径リング共振器の模式図を Fig.1に示す.Ring1,Ring2 の周長 L1, L2はそれぞれ 272 m (FSR 2.31nm), 408 m(FSR 1.42 nm)である[2].各導波路は,コア層が多重五層非対称結合量子井戸(FACQW) [3]で構成されたハイメサ導波路を想定した[2].コア層厚は約 300 nm,導波路幅は 1.45 mとする.2次直列結合リング共振器のため,ヒットレススイッチング動作が可能となる. リング導波路における導波損失(0.21dB/100μm)も考慮したフィルタ特性の平坦化条件(バタワース条件) を満たす値として,バスラインとRing1間の結合率Kb, Ring1 と Ring2 間の結合率 Krはそれぞれ 0.379,0.132 と設定した.この場合のドロップポートスペクトルを Fig. 2 に示す.比較として,導波損失を考慮しない従来の平坦化条件(Kb=0.135, Kr=0.135)と従来の平坦化条件(Kb=0.378, Kr=0.0357)を満たす場合のスペクトルも示す.導波損失を考慮したことで,より平坦化した透過スペクトルが得られている.スペクトルの平坦さを表す Shape Factor[4] (ピークから1 dB のバンド幅 /ピークから10 dB のバンド幅)は従来の平坦化条件と比較して 0.274から 0.448に改善している.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://confit.atlas.jp/guide/event-img/jsap2014s/20a-F8-5/public/pdf?type=in
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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