摻鈰釔鋁石榴石晶體光纖用於光學同調斷層之研究

Study of Ce(superscript 3+): YAG Crystal Fiber Based Optical Coherence Tomography

蔡建中

《光學工程》 113期 (2011/04) Pp. 1-6

https://doi.org/10.30011/OE.201104.0001

摘要

本文介紹到系統所使用之光源，是利用共抽拉雷射加熱長晶法，生長出之雙披覆晶體光纖(double-clad crystal fiber; DCF)結構，收集被激發出之增益自發輻射光。目前，已可生長出直徑10微米以下之小纖心雙披覆晶體光纖，去提升光源之亮度與橫向空間模態品質。此寬頻光，使用於光學同調斷層術上時，擁有空氣中1.5微米之縱向解析度，並將之使用在魚類角膜與液晶面板上，發現魚類角膜基質之三維分布與角膜隨時間萎縮之現象，以及垂直配向液晶面板(Vertically aligned liquid crystal display, VA-LCD)之三維影像資訊、製程缺陷、以及液晶層厚度資訊。這些高解析三維資訊，是目前世界上其他技術，所無法觀察到的。

關鍵字

晶體光纖 ； 光學同調斷層術 ； 角膜 ； 液晶

並列摘要

The co-drawing laser-heated pedestal growth method to grow the double-clad crystal fiber (DCF) as a waveguide light source, to effectively collect the ASE light was utilized. Recently, Ce(superscript 3+): YAG DCF with diameter less than 10 μm, which can improve light source brightness and transversal mode quality, provides 1.5-μm axial resolution in air. We successfully applied an OCT system to image the fish cornea and the vertically-aligned liquid crystal display (VA-LCD) panel that the 3-dimensional (3-D) stroma population and the atrophic phenomenon with variant time were verified; meanwhile, the defects and the cell gaps of the VA-LCD panel from 3-D OCT reconstruction were also observed and quantized. Such clear 3-D image reconstruction can not be achieved via other optical techniques.

並列關鍵字

Crystal fiber ； Optical coherence tomography ； Cornea ； Liquid crystal