Abstract
An integrated microball lens fiber catheter probe is demonstrated, which has
better lateral resolution and longer working distance than a corresponding bare
fiber probe with diverging beam for Fourier domain optical coherence tomography
(FDOCT). Simulation results are shown to gain the effect of the distance between the
microball lens and the bare fiber to the focusing plane and beam width. The freedom
of modifying the working distance and lateral resolution is shown. This is achieved
by changing the gap distance between the single-mode fiber and the microball lens
within the packaged surgical needle catheter without using an additional beam
expander having a fixed length. The probe successfully acquired cross-sectional
images of ocular tissues from an animal sample with the proposed miniaturized
imaging probe.
© 2011 Chinese Optics Letters
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