1. Articles from Min Yong Jeon

    1-8 of 8
    1. Stiffness Comparison of Tissue Phantoms using Optical Coherence Elastography without a Load Cell

      Stiffness Comparison of Tissue Phantoms using Optical Coherence Elastography without a Load Cell

      Mechanical property of tissue is closely related to diseases such as breast cancer, prostate cancer, cirrhosis of the liver, and atherosclerosis. Therefore measurement of tissue mechanical property is important for a better diagnosis. Ultrasound elastography has been developed as a diagnostic modality for a number of diseases that maps mechanical property of tissue. Optical coherence elastography (OCE) has a higher spatial resolution than ultrasound elastography. OCE, therefore, could be a great help for early diagnosis. In this study, we made tissue phantoms and measured their compressive moduli with a rheometer measuring the response to applied force. Uniaxial strain of the ...

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      Mentions: Min Yong Jeon
    2. Wavelength-swept lasers and their application to fiber optic sensors

      Wavelength-swept lasers and their application to fiber optic sensors

      The wavelength swept laser (WSL) is a promising optical source in optical coherence tomography, optical fiber sensor, and optical beat source generation. It is demonstrated by employing a narrowband wavelength-scanning filter, such as a fast rotating polygonal-scanner-filter, a diffraction grating on a galvo-scan mirror, or a fiber Fabry-Perot tunable filter (FFP-TF). In this manuscript, we present our researches on the dynamic fiber-optic sensors. Two kinds of WSLs are used to demonstrate the dynamic measurement in the fiber-optic sensors. One is the WSL using a polygon-scanner-based wavelength filter and the other is the Fourier domain mode-locked (FDML) WSL using a FFP-TF ...

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      Mentions: Min Yong Jeon
    3. Combined photoacoustic and optical coherence tomography using a single near-infrared supercontinuum laser source

      Combined photoacoustic and optical coherence tomography using a single near-infrared supercontinuum laser source

      . We developed an integrated dual-modal photoacoustic and optical coherence tomography (PA-OCT) system using a single near-infrared supercontinuum laser source to simultaneously provide both optical absorption and scattering contrasts. A pulsed broadband supercontinuum source was generated by a pulsed Nd:YAG laser and a photonic-crystal fiber. When we imaged two colored hairs, the black hair was visible in both PA and OCT images, whereas the white hair was only mapped in the OCT image. The single laser source will potentially allow us to implement relatively simple, cheap, and compact dual-modal PA-OCT systems, which are key criteria for fast clinical translation and ...

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    4. Rapidly frequency-swept optical beat source for continuous wave terahertz generation

      Rapidly frequency-swept optical beat source for continuous wave terahertz generation

      We propose a rapidly frequency-swept optical beat source for continuous wave (CW) THz generation using a wavelength swept laser and a fixed distributed feedback (DFB) laser. The range of the sweeping bandwidth is about 17.3 nm (2.16 THz), 1541.42–1558.72 nm. The achieved side mode suppression ratio for both wavelengths within the full sweeping range is more than 45 dB. We observe CW THz signals for tunable optical beat sources using a fiber coupled CW THz measurement system to confirm the feasibility of using our frequency swept optical beat source as a CW THz radiation source ...

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      Mentions: Min Yong Jeon
    5. K-Domain Linearization Of Wavelength-Swept Laser For Optical Coherence Tomography

      K-Domain Linearization Of Wavelength-Swept Laser For Optical Coherence Tomography

      We propose a new method for k-domain linearization using fiber Bragg gratings (FBGs) in a wavelength-swept source for optical coherence tomography (OCT). A wavelength-swept source with a scanning fiber Fabry-Perot tunable filter is constructed using a conventional ring laser cavity. Five FBGs are used to recalibrate the nonlinear response from the wavelength-swept source. We achieved good quality sample imaging using the k-domain linearization algorithm based on FBGs. The sensitivity at 2 mm is improved by more than 10 dB after k-domain linearization.

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    6. Characterization of Fourier domain modelocked wavelength swept laser for optical coherence tomography imaging

      Characterization of Fourier domain modelocked wavelength swept laser for optical coherence tomography imaging

      Min Yong Jeon, Jun Zhang, Zhongping Chen. We present characteristics of a wavelength swept laser with a scanning fiber Fabry-Perot filter at 1300 nm. We investigate the dependence of the scanning frequencies in the swept laser. In conventional wavelength swept lasers, the relative intensity of the laser output decreases significantly as ... [Opt. Express 16, 3727-3737 (2008)]

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    7. High speed broadband Fourier domain mode locked swept source with multiple SOAs

      Jun Zhang, Min Yong Jeon, and Zhongping Chen A high-speed, broadband Fourier domain mode-locked (FDML) wavelength swept source at center wavelength of 1300 nm for high-resolution and high-speed Fourier domain optical coherence tomography was demonstrated. With two semiconductor optical amplifiers as gain media, the laser is capable of FWHM tun ... [Proc. SPIE Int. Soc. Opt. Eng. 6847, 684712 (2008)] published Mon Feb 18, 2008.
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    8. High-speed and wide bandwidth Fourier domain mode-locked wavelength swept laser with multiple SOAs

      High-speed and wide bandwidth Fourier domain mode-locked wavelength swept laser with multiple SOAs

      We report on the development of a high-speed, wide bandwidth Fourier domain mode-locked (FDML) wavelength swept laser of around 1300 nm using two gain media for high-resolution and high-speed Fourier domain optical coherence tomography. The wavelength swept laser is capable of FWHM scanning range ... [Opt. Express 16, 2547-2554 (2008)]

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    1-8 of 8
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  2. Topics in the News

    1. (8 articles) Min Yong Jeon
    2. (3 articles) UC Irvine
    3. (3 articles) Zhongping Chen
    4. (2 articles) Jun Zhang
    5. (2 articles) Heidelberg Engineering
    6. (1 articles) Kyungpook National University
    7. (1 articles) Gwangju Institute of Science and Technology
    8. (1 articles) State University of New York at Buffalo
    9. (1 articles) Jeehyun Kim
    10. (1 articles) Changho Lee
    11. (1 articles) Tae Joong Eom
    12. (1 articles) University of Ulsan
    13. (1 articles) The Chinese University of Hong Kong
    14. (1 articles) University of Groningen
    15. (1 articles) Fernando Alfonso
    16. (1 articles) Optovue
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    High-speed and wide bandwidth Fourier domain mode-locked wavelength swept laser with multiple SOAs Characterization of Fourier domain modelocked wavelength swept laser for optical coherence tomography imaging K-Domain Linearization Of Wavelength-Swept Laser For Optical Coherence Tomography Rapidly frequency-swept optical beat source for continuous wave terahertz generation Combined photoacoustic and optical coherence tomography using a single near-infrared supercontinuum laser source Wavelength-swept lasers and their application to fiber optic sensors Stiffness Comparison of Tissue Phantoms using Optical Coherence Elastography without a Load Cell Non-invasive diagnosis of acquired lymphangiectases using optical coherence tomography Depth-resolved investigation of multiple optical properties and wrinkle morphology in eye-corner areas with multi-contrast Jones matrix optical coherence tomography Lipemia Retinalis: Hyperreflective Vascular Changes, Detected by Optical Coherence Tomography Enhanced Depth Imaging Optical Coherence Tomography Technology Reveals a Significant Association Between Optic Nerve Drusen Anterior Displacement and Retinal Nerve Fiber Layer Thinning Over Time Comparison of Peripapillary Vessel Density of Acute Nonarteritic Anterior Ischemic Optic Neuropathy and Other Optic Neuropathies With Disc Swelling Using Optical Coherence Tomography Angiography: A Pilot Study