1. Articles from Joo Beom Eom

    1-5 of 5
    1. Wide field of view optical coherence tomography for structural and functional diagnoses in dentistry

      Wide field of view optical coherence tomography for structural and functional diagnoses in dentistry

      We report herein the fabrication and performance response of a three-dimensional (3-D) intraoral scan probe based on optical coherence tomography (OCT) that enables 3-D structural and functional diagnoses of the human teeth. The OCT system was configured using a swept-source OCT (SS-OCT) with a center wavelength of 1310 nm. The scan probe was built using an MEMS mirror and an optical collimator. The implemented SS-OCT equipped with the MEMS-based scan probe yielded an axial resolution of 10  μm and a scan range of 8  ×  8  mm 2 . Two-dimensional (2-D) cross-sectional images of the teeth were acquired by the scan probe ...

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      Mentions: Jonghyun Eom
    2. Improvement of axial resolution of spectral domain optical coherence tomography with wide band PLC splitter

      Improvement of axial resolution of spectral domain optical coherence tomography with wide band PLC splitter

      We report the development and performance of high resolution spectral domain optical coherence tomography (SD-OCT) system based on 2×2 planar lightwave circuit (PLC) splitter that was designed as a single mode splitter at near infrared and used as the beam splitter for a SD-OCT system. The splitter has been made by coupling SMFs to a planar lightwave circuit (PLC) splitter chip. The PLC splitter chip was fabricated to have a single mode property with 740 nm cutoff wavelength and the SMFs, which have 730 nm cutoff wavelength, were securely connected to the PLC chip through fiber block arrays having ...

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    3. 2X2 Photonic Crystal Fiber Splitter For 800 Nm Spectral Domain Optical Coherence Tomography

      2X2 Photonic Crystal Fiber Splitter For 800 Nm Spectral Domain Optical Coherence Tomography

      We report the fabrication and performance of the 2x2 photonic crystal fiber (PCF) splitter that was designed as a single mode splitter at the 800 nm optical band and used as the beam splitter for a spectral domain optical coherence tomography system. The PCF splitter has been made by coupling PCFs to a planar lightwave circuit (PLC) splitter chip. The PLC splitter chip was fabricated to have a single mode property at the 800 nm wavelength band and the PCFs were securely connected to the PLC chip through PCF block arrays having lithographically fabricated V grooves. The core size of ...

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    4. Combined swept-source optical coherence tomography and fluorescence spectroscopy system

      Combined swept-source optical coherence tomography and fluorescence spectroscopy system

      We report a combined swept source optical coherence tomography (SSOCT) and fluorescence spectroscopy (FS) system for multimodal measurements of biochemical information and internal structures with fast imaging speed. The FS probe composed of a double clad fiber (DCF) coupler is adopted into the single mode fiber based SSOCT system. Here, the DCF coupler acts as a FS system as well as a multifunctional probe for the SSOCT-FS system. The performances of the single-unit SSOCT-FS system is confirmed by monitoring the fluorescence signal from photosensitizer in cancerous region of in-vivo rat and by imaging the internal structures of same region with ...

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    5. 2×2 photonic crystal fiber splitter based on silica-based planar lightwave circuits

      2×2 photonic crystal fiber splitter based on silica-based planar lightwave circuits
      A 2×2 photonic crystal fiber (PCF) planar lightwave circuit (PLC) splitter, which splits optical power between two PCF channels, has been made by PCF-to-PLC connections. PCF array blocks were lithographically fabricated to have fiber V grooves and used to firmly hold PCFs and align them to the PLC splitter. The proposed splitter showed a rather flat splitting ratio over a wide wavelength range from 1250 nmto1750 nm. With the implemented splitter, we obtained a low excess loss of 1.6 dB, a low polarization-dependent loss of 0.1 dB, and a high return loss of 52 dB. The ultrabroadband ...
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    1-5 of 5
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  2. Topics in the News

    1. (4 articles) Gwangju Institute of Science and Technology
    2. (4 articles) Byeong Ha Lee
    3. (2 articles) Myeong Jin Ju
    4. (2 articles) Eun Jung Min
    5. (2 articles) Kwan Seob Park
    6. (1 articles) Seon Young Ryu
    7. (1 articles) Jonghyun Eom
    8. (1 articles) Sang Jin Lee
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    2×2 photonic crystal fiber splitter based on silica-based planar lightwave circuits Combined swept-source optical coherence tomography and fluorescence spectroscopy system 2X2 Photonic Crystal Fiber Splitter For 800 Nm Spectral Domain Optical Coherence Tomography Improvement of axial resolution of spectral domain optical coherence tomography with wide band PLC splitter Wide field of view optical coherence tomography for structural and functional diagnoses in dentistry In vivo dynamic characterization of the human tympanic membrane using pneumatic optical coherence tomography Negative Vessel Remodeling in Stargardt Disease Quantified with Volume-Rendered Optical Coherence Tomography Angiography Spectral Domain – Optical Coherence Tomography findings in Triple-A Syndrome – A case series from Pakistan Feasibility of microscope-integrated swept-source optical coherence tomography in canaloplasty A preliminary study of post-progressive nail-art effects on in vivo nail plate using optical coherence tomography-based intensity profiling assessment Analysis of the Choroid and Its Relationship with the Outer Retina in Patients with Diabetes Mellitus Using Binarization Techniques Based on Spectral-Domain Optical Coherence Tomography Quantifying the Pattern of Retinal Vascular Orientation in Diabetic Retinopathy Using Optical Coherence Tomography Angiography