S型彎曲波導與微米小球共振腔之光耦合效率研究

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/6929

Title:	S型彎曲波導與微米小球共振腔之光耦合效率研究
Authors:	江信東;Hsin-Tung Chiang
Contributors:	光電科學研究所
Keywords:	S型彎曲波導;彎曲損失;光束傳播法;微米小球;保角轉換;microsphere;conformal transformation;WGMs;bending loss;BPM;Bending waveguide
Date:	2006-07-03
Issue Date:	2009-09-22 10:32:24 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本論文提出一種新的共振器耦合器結構，主要利用S型彎曲波導所造成的彎曲損失將能量耦合進入微米小球共振腔，此結構可積體化構裝於Si晶片上具有較佳的機械強度等優點。在實驗模擬上我們得到與微米小球的耦合效率最高可達35%以上，而實驗的量測上，S型彎曲波導在彎曲半徑為1500微米且彎曲角度為41度時的彎曲損失約為13dB/cm，而在角度為40度時彎曲損失開始明顯上升的趨勢，與利用光束傳播法模擬所得之結果吻合。We have designed and fabricated an S-bend waveguide structure which enables one to excite the Whispering Gallery Modes (WGMs) in microspheres. The highest coupling efficiency found is estimated to be about 35%, and the designed structure has high position and wavelength tolerance. By misplacing the microsphere by 15um only results in 6% coupling efficiency degradation; while 10nm wavelength drift results in 3dB/cm coupling efficiency degradation. Preliminary experimental result shows that the design is in close agreement with the simulation using beam propagation method (BPM). II
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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