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Postdoctoral Researchers
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Dr. Igju Jeon (전익주)
Postdoctoral Researcher [Mar 2025 - Present]
Working on portable fiber-photonic platforms for laser and frequency comb stabilization
Education:
KAIST, PhD in Mechanical Engineering, Feb 2025.
KAIST, MS in Mechanical Engineering, Feb 2020.
KAIST, BS in Mechanical Engineering, Aug 2017.
Selected Publication:
- I. Jeon, C. Ahn, C. Kim, S. Park, W. Jeon, and J. Kim,
"Palm-sized, vibration-insensitive and vacuum-free all-fiber-photonic module for 10-14-level stabilization of CW lasers and frequency combs," APL Photonics 8, 120804 (2023) -- Selected as the Featured Article of APL Photonics
- I. Jeon, W. Jeong, C. Ahn, and J. Kim, "10-15-level laser stabilization down to fiber thermal noise limit using self-homodyne detection," Optics Letters 50, 1057-1060 (2025)
Awards: Outstanding Paper Award from OSK Optics and Photonics Congress 2021, Jul 2021
Visiting Research:
Nokia-Bell Labs (USA) [Oct 2024]
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Dr. Changmin Ahn (안창민)
Postdoctoral Researcher [Mar 2025 - Present]
Working on atomic-referenced portable optical and microwave/mm-wave frequency synthesizers
Education:
KAIST, PhD in Mechanical Engineering, Feb 2025.
KAIST, MS in Mechanical Engineering, Feb 2021.
KAIST, BS in Mechanical Engineering, Feb 2019.
Tech Univ of Berlin (Germany), Exchange Student [Sep 2017-Feb 2018]
Selected Publication:
- C. Ahn, Y. Na, M. Hyun, J. Bae, and J. Kim , "Synchronization of an optical frequency comb and a microwave oscillator with 53 zs/Hz1/2 resolution and 10-20-level stability," Photonics Research 10, 365-372 (2022).
- C. Ahn, Y. Na, and J. Kim,
"Dynamic absolute distance measurement with nanometer-precision and MHz acquisition rate using a frequency comb-based combined method," Optics and Lasers in Engineering 162, 107414 (2023).
Awards:
- Outstanding Paper Award from OSK Winter Meeting and Conference 2025, Feb 2025
- CLEO-PR 2024 Best Student Paper Award (2nd Place) from CLEO-PR 2024, Aug 2024
- Outstanding Paper Award from OSK Winter Meeting and Conference 2023, Feb 2023
- Outstanding Student Paper Award from OSK Photonics Conference 2021, Dec 2021
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Graduate Student Researchers
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Jinho Bae (배진호)
Master-PhD student [Mar 2021 - Present]
Working on optical sensors for semiconductor manufacturing processes
Education:
KAIST, BS in Mechanical Engineering, Feb 2021.
Selected Publication:
- J. Bae, M. Hyun, J. Hong, Y. Jeon, S. Son, Y. Seo, S. Ha, and J. Kim, "Optical reflectometry-based high-speed temperature change measurement of silicon wafer surfaces," Paper 12618-82, SPIE Optical Metrology 2023
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Hyungsoo Choi (최형수)
PhD student [Sep 2023 - Present]
Working on comb-based industrial imaging and metrology
Researcher, Kohyoung Technology R&D Center [Dec 2019 - Jul 2023]
Education:
KAIST, MS in Mechanical Engineering, Feb 2020
KAIST, BS in Mechanical Engineering, Feb 2018
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Jihoon Baek (백지훈)
PhD student [Mar 2025 - Present]
Working on comb-based vibration and micro/nano-mechanical sensors
Education:
KAIST, MS in Mechanical Engineering, Feb 2025.
Pusan National University, BS in Mechanical Engineering, Feb 2023.
Student Intern at Samsung Electronics Mechatronics R&D Technology Center, Jul - Aug 2022.
Visiting Research:
Chalmers University of Technology (Sweden) [Oct 2024]
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Junyong Choi (최준용)
PhD student [Mar 2025 - Present]
Working on ultralow-jitter microcombs and optoelectronic synchronization
Education:
KAIST, MS in Mechanical Engineering, Feb 2025.
Hanyang University, BS in Mechanical Engineering, Feb 2023.
Visiting Research:
Chalmers University of Technology (Sweden) [Oct 2024]
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Woosong Jeong (정우송)
Master student [Mar 2024 - Present]
Working on laser stabilization and photonic phase calibration for radio telescopes
Education:
Inha University, BS in Mechanical Engineering, Feb 2024.
Illinois Institute of Technology (USA), Exchange Student [Sep 2022-Jan 2023]
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Euisang Ryu
Master student [Mar 2025 - Present]
Education:
Chungnam Nat'l Univ, BS in Mechanical Engineering, Aug 2024.
George Washington University (USA), i-Core Program Intern (2022)
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Undergraduate Student Researchers
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Jonghyun Kwon (권종현)
Undergraduate researcher [Jun 2024 - Present]
Working on time-stretched TOF detection
Education: Currently undergraduate student of KAIST ME
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Administrative Staff
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