1. Articles from Hyung-Seok Lee

    1-2 of 2
    1. A Fiber Bragg Grating Sensor Interrogation System Based on a Linearly Wavelength-Swept Thermo-Optic Laser Chip

      A Fiber Bragg Grating Sensor Interrogation System Based on a Linearly Wavelength-Swept Thermo-Optic Laser Chip

      A linearized wavelength-swept thermo-optic laser chip was applied to demonstrate a fiber Bragg grating (FBG) sensor interrogation system. A broad tuning range of 11.8 nm was periodically obtained from the laser chip for a sweep rate of 16 Hz. To measure the linear time response of the reflection signal from the FBG sensor, a programmed driving signal was directly applied to the wavelength-swept laser chip. The linear wavelength response of the applied strain was clearly extracted with an R-squared value of 0.99994. To test the feasibility of the system for dynamic measurements, the dynamic strain was successfully interrogated ...

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    2. 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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    1-2 of 2
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  2. Topics in the News

    1. (2 articles) Pusan National University
    2. (2 articles) Myung Yung Jeong
    3. (2 articles) Chang-Seok Kim
    4. (1 articles) UC Irvine
    5. (1 articles) Hwi Don Lee
    6. (1 articles) Jae-Seok Park
    7. (1 articles) Yamagata University
    8. (1 articles) Bern University of Applied Sciences
    9. (1 articles) Medical University of Vienna
    10. (1 articles) University of Maryland
    11. (1 articles) Koen A. Vermeer
    12. (1 articles) Vishali Gupta
    13. (1 articles) Bernhard Baumann
    14. (1 articles) Brandon J. Lujan
    15. (1 articles) Antonia Lichtenegger
    16. (1 articles) OCTLIGHT
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