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半導體環形雷射二極體共軛光共振腔輸出特性研究

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表 3.1 650nm  紅光磊晶片結構圖
圖 4.12 之 B、C、D、E 分別表示四個端點的量測位置由 Sample(A)L-I 圖中 我們可以發現,Y-型波導端 D、E 處的 L-I 特性曲線具有多個啟動電流,最低的起 動電流在 400 mA 是屬於環形共振腔的啟動電流,原因是環形共振腔的電流注入長 度較長,我們也可以在 E 端的光譜上觀察到位於 655.5 nm 一接近單模態的環形共 振腔雷射波峰,第二個啟動電流在 700 mA 很可能是 Y-型波導段達到共振條件, 原因是環形共振腔中正/反兩光束在 Y-型波導與環形共振交接處因四波混頻造成

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