1. Articles from Jae-Seok Park

    1-4 of 4
    1. Optical sensor interrogation system based on FDML wavelength swept laser

      Optical sensor interrogation system based on FDML wavelength swept laser

      Provided is an optical sensor interrogation system. The optical sensor interrogation system includes: a light source unit which matches round-trip time of light and wavelength tunable cycle time of light in a resonator and emits light; a sensing unit which receives an optical signal in which a center wavelength periodically tunes, from the light source unit and tunes the center wavelength of the optical signal according to physical changes applied from the outside; and a signal processing unit which receives the optical signal reflected from the sensing unit, detects data, and images the data. In particular, the light source unit ...

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    2. Post-tuning of Sample Position in Common-path Swept-source Optical Coherence Tomography

      Post-tuning of Sample Position in Common-path Swept-source Optical Coherence Tomography
      Common-path interferometers are widely used for endoscopic optical coherence tomography (OCT) because an arbitrary arm length can be chosen for the endoscopic imaging probe. However, the scheme suffers from the limited range of the sample position distance from the end of the imaging probe because the position between the reference reflector and the sample is limited by the optical path-length difference (OPD) to induce an interference signal. In this study, we developed a novel method for compensating the arbitrary sample position in common-path swept-source OCT by adding an extra Mach-Zehnder interferometer in the post-path of the interfered optical signal. Theoretical ...
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      Mentions: Jae-Seok Park
    3. Spectrally-sampled OCT for sensitivity improvement from limited optical power

      Spectrally-sampled OCT for sensitivity improvement from limited optical power

      Although high optical illumination power is favored in optical coherence tomography (OCT) for better signal-to-noise ratio, optical power is often limited by a damaged threshold for biomedical living tissues and autocorrelation signals observed in tomograms. In order to improve signal sensitivity without increasing the optical illumination power, a spectrally sampled multi-wavelength light source is proposed for the OCT system. A fiber Sagnac comb filter was used to spectrally sample the output of a continuous spectral light source. Point spread function analysis shows that the spectrally sampled OCT has an almost 50% dynamic range improvement in comparison with a conventional continuous ...

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    4. Multi-wavelength source for the lower exposure intensity of spectral OCT

      There have been several technologies to enable high resolution cross-sectional images of biological tissues in optical coherence tomography (OCT) method. Optical frequency comb (OFC) source has been proposed to overcome the crosstalk problem among the CCD detector pixels of the continuous spectrum of light source. Recently, a passive-type OFC is demonstrated simply placing a Fabry-Perot interferometer filter right after the broadband light source, but it shows a high loss of output light power and limited tenability of channel spacing of multi-wavelength. In this work, we experimentally demonstrate a spectral comparison of a novel multi-wavelength source based on a fiber Sagnac ...

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) Jae-Seok Park
    2. (3 articles) Pusan National University
    3. (3 articles) Myung Yung Jeong
    4. (3 articles) Chang-Seok Kim
    5. (2 articles) Tae Joong Eom
    6. (1 articles) Gwangju Institute of Science and Technology
    7. (1 articles) UCLA
    8. (1 articles) University of Groningen
    9. (1 articles) University of Wisconsin
    10. (1 articles) University of St. Andrews
    11. (1 articles) Duke University
    12. (1 articles) Kishan Dholakia
    13. (1 articles) Cynthia A. Toth
    14. (1 articles) Optovue
    15. (1 articles) Leica
    16. (1 articles) Heidelberg Engineering
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    Spectrally-sampled OCT for sensitivity improvement from limited optical power Post-tuning of Sample Position in Common-path Swept-source Optical Coherence Tomography Optical sensor interrogation system based on FDML wavelength swept laser Long-Term Arterial Remodeling After Bioresorbable Scaffold Implantation 4-Year Follow-up of Quantitative Coronary Angiography, Histology and Optical Coherence Tomography Visualization of Bacterial Colonization and Cellular Layers in a Gut-on-a-Chip System Using Optical Coherence Tomography Optical Coherence Tomography Measurements as Potential Imaging Biomarkers for Parkinson's Disease: A Systematic Review and Meta-analysis Use of ultra-wide field retinal imaging and optical coherence tomography angiography in the diagnosis of incomplete Susac syndrome Repeatability and agreement of total corneal and sublayer pachymetry with two different algorithms of fourier-domain optical coherence tomography in myopic and post photorefractive keratectomy eyes Monitoring Response to Platelet-Rich Plasma in Patients with Alopecia Areata with Optical Coherence Tomography: A Case Series NONPERFUSION AREA QUANTIFICATION IN BRANCH RETINAL VEIN OCCLUSION: A WIDEFIELD OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY STUDY Nonperfusion Assessment in Retinal Vein Occlusion: Comparison between Ultra-Widefield Fluorescein Angiography and Widefield OCT-Angiography Anatomical Location of the Raphe and Extended Raphe in the Human Retina: Implications for Assessment of the Optic Nerve with OCT