18 February 2008 Side-imaging lensed photonic crystal fiber probe
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We report on 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 as a focuser, were simultaneously formed along a small piece of PCF by using arc discharges. The side-viewing ability was endowed by polishing the ball lens with a femto-second laser to form a TIR (total internal reflection) surface. The working distance and the transverse resolution of the fabricated single-body lensed-PCF were experimentally measured to be ~570 μm and 6.8 μm, respectively. With the proposed lensed-PCF probe, OCT images of an in vitro biological sample were successfully obtained
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Hae Young Choi, Hae Young Choi, Seon Young Ryu, Seon Young Ryu, Jihoon Na, Jihoon Na, Byeong Ha Lee, Byeong Ha Lee, Ik-Bu Sohn, Ik-Bu Sohn, Young-Chul Noh, Young-Chul Noh, Jongmin Lee, Jongmin Lee, } "Side-imaging lensed photonic crystal fiber probe", Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 68472F (18 February 2008); doi: 10.1117/12.766349; https://doi.org/10.1117/12.766349


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