以側磨光纖半塊材耦合器激發微米球型共振腔基模之研究

Excitation of fundamental whispering-gallery modes in a microsphere by a half-block coupler

陳泳智(Yong-Zhi Chen)

指導教授 ： 戴朝義

國立中央大學/理學院/光電科學研究所/碩士(2007年)

摘要

本論文研究以側磨光纖半塊材耦合器激發微米球型共振腔之基模。耦合器以長程光通訊之單模光纖製作(Corning SMF-28)，其等效折射率為1.4682 @1550nm ；微米小球則以BK7玻璃製作，其半徑為150±1.5微米，折射率為1.50065 @1550nm。所使用的光源為波段1545nm至1565nm的放大自發性輻射(ASE)，寬頻光波進入耦合器後，其中某些特定波長的光波藉由耦合器以消散場的形式耦合進入微米球型共振腔，形成共振模態。本實驗所達到的最高耦合效率為10%，品質因子為17000以及自由光譜範圍為1.7nm。

關鍵字

微米球 ； 品質因子 ； 耳語廊模

並列摘要

A simple method for the excitation of fundamental whispering-gallery modes in a BK7 glass microsphere by a side-polished fiber half-block coupler is demonstrated. The coupler is made of the single-mode fiber (Corning SMF-28) which has an effective refractive index of 1.4682 @1550nm. The radius and refractive index of the microsphere equal to 150± 1.5 um and 1.500065 @1550 nm, respectively. The resonant modes are identified from the transmission spectrum, which indicates that the quality factor of 17000, free spectral range of 1.7 nm and coupling efficiency of 10% are obtained.

並列關鍵字

whispering-gallery mode ； microsphere ； quality factor ； half-block coupler

參考文獻

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