制作
小型化
材料科学
光学相干层析成像
抛光
蚀刻(微加工)
光纤
光学
多模光纤
单模光纤
光电子学
纤维
折射率
纳米技术
复合材料
物理
图层(电子)
替代医学
病理
医学
作者
Alexandre Abid,Shiv Mittal,Christos Boutopoulos
标识
DOI:10.1117/1.jbo.25.3.032006
摘要
We introduced and validated a method to miniaturize graded-index (GRIN) fiber-based optical coherence tomography (OCT) probes down to 70 μm in diameter. The probes consist in an assembly of single-mode (SM), coreless (CL), and graded-index (GRIN) fibers. We opted for a probe design enabling controlled size reduction by hydrogen fluoride etching. The fabrication approach prevents nonuniform etching for both the GRIN and SM fiber components, while it requires no probe polishing postetching. We found that the miniaturized probes present insignificant loss of sensitivity (∼1 dB) compared to their thicker (125 μm) counterparts. We also showed that their focusing capabilities remain tunable and highly predictable. The fabrication process is simple and can be carried out by using inexpensive telecom equipment. Both the fabrication process and the developed probes can benefit the prototyping of minimally invasive endoscopic tools.
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