Choi Hae Young, Ryu Seon Young, Na Jihoon, Lee Byeong Ha, Sohn Ik-Bu, Noh Young-Chul, Lee Jongmin
Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea.
Opt Lett. 2008 Jan 1;33(1):34-6. doi: 10.1364/ol.33.000034.
We report the fabrication and performance of a lensed photonic crystal fiber (PCF) designed as a compact but effective side-viewing optical imaging probe. The lensed-PCF probe was implemented in a single body without using any other fibers or additional optics. The beam expansion region and a focusing ball lens, necessary for a focuser, were simultaneously formed along a small piece of PCF by applying arc discharges. The side-viewing ability was provided by polishing the ball lens with a femtosecond laser to form a total internal reflection surface. The working distance and the transverse resolution of the fabricated single-body lensed-PCF were experimentally measured to be 570 and 6.8 microm, respectively. With the proposed lensed-PCF probe, optical coherence tomography images of an in vitro biological sample were successfully obtained.
我们报告了一种透镜式光子晶体光纤（PCF）的制造及其性能，该光纤被设计为一种紧凑但有效的侧视光学成像探头。透镜式PCF探头集成在一个整体中，无需使用任何其他光纤或额外的光学元件。通过施加电弧放电，在一小段PCF上同时形成了扩束区域和聚焦所需的聚焦球透镜。通过用飞秒激光对球透镜进行抛光以形成全内反射表面，从而实现了侧视能力。实验测得所制造的一体式透镜式PCF的工作距离和横向分辨率分别为570微米和6.8微米。使用所提出的透镜式PCF探头，成功获取了体外生物样品的光学相干断层扫描图像。
