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21 February 2008Endoscopic common-path OCT based on sweeping laser source and curled optical patch cord
Several technical problems have to be overcome before Optical Coherence Tomography (OCT) can be accepted among
the established endoscopic imaging modalities. Most of conventional Michelson-based OCT systems need to have two
separated paths of the sample and reference arms, which limits the flexibility of endoscopic probe. Recently, common-path
interferometer based OCT have been demonstrated to circumvent the mismatch problems of length, polarization,
and dispersion between the reference and sample arms, but the interferometric scanning methods have been realized with
time-domain PZT or spectral-domain CCD. In this work, we demonstrate a novel Fourier-domain common-path OCT
based on sweeping laser source, which shows superiority in the speed and robustness. Using a holey optical fiber with
low bending loss, a novel curled optical patch cord, like a curl cord of telephone, is also adapted for the convenient
access to the biological target at the flexible distance. The freedom to use an arbitrary length and wiring of the probe can
provide more flexibility for use in endoscopic OCT.
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Jae Suk Park, Eun Joo Jung, Myung Yung Jeong, Chang-Seok Kim, Jin U. Kang, "Endoscopic common-path OCT based on sweeping laser source and curled optical patch cord," Proc. SPIE 6851, Endoscopic Microscopy III, 68510I (21 February 2008); https://doi.org/10.1117/12.762938