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Postdoctoral Researchers
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Dr. Minji Hyun (현민지)
Postdoctoral Researcher [Mar 2024 - Present]
Working on on-chip clocking, data conversion and RF generation with photocurrent pulses
Education:
KAIST, PhD in Mechanical Engineering, Feb 2024.
KAIST, MS in Mechanical Engineering, Feb 2020.
Handong Global Univ, BS in Mechanical and Control Engineering, Feb 2018.
Selected Publication:
- M. Hyun, C. Ahn, Y. Na, H. Chung, and J. Kim, "Attosecond electronic timing with rising edges of photocurrent pulses," Nature Communications 11, 3667 (2020).
- M. Hyun, C. Jeon, and J. Kim, "Ultralow-noise microwave extraction from optical frequency combs using photocurrent pulse shaping with balanced photodetection," Scientific Reports 11, 17809 (2021).
- M. Hyun, H. Chung, W. Na, and J. Kim, "Femtosecond-precision electronic clock distribution in CMOS chips by injecting frequency comb-extracted photocurrent pulses," Nature Communications 14, 2345 (2023).
- M. Hyun, C. Ahn, Y. Bae, J. Cho, and J. Kim, "Femtosecond-resolution optical pulse interleaving time error detector," Optics Letters 48, 6472-6475 (2023).
Selected Patents:
- "System for generating low-jitter digital clock signals using pulsed laser" with Y. Na, H. Chung and J. Kim, US Patent 11,082,032 B2 (issued on Aug 3, 2021)
Awards:
- Outstanding Student Paper Award from OSK-Optica-OSJ Joint Symposia 2023, Aug 2023
- Outstanding Student Paper Award from OSK Photonics Conference 2021, Dec 2021
- Woodeok Foundation Graduate Fellowship, Nov 2021
- Outstanding Master's Graduate Award from KAIST ME Department, Nov 2020
- Selected as Chairs' Pick Paper of CLEO 2019, May 2019
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Graduate Student Researchers
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Igju Jeon (전익주)
PhD student [Mar 2020 - Present]
Working on portable platforms for laser and frequency comb stabilization
Education:
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
Awards: Outstanding Paper Award from OSK Optics and Photonics Congress 2021, Jul 2021
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Changmin Ahn (안창민)
PhD student [Mar 2021 - Present]
Working on atomic reference-based portable optical frequency synthesizers
Education:
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 2023, Feb 2023
- Outstanding Student Paper Award from OSK Photonics Conference 2021, Dec 2021
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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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Jihoon Baek (백지훈)
Master student [Mar 2023 - Present]
Working on micro-comb-based microwave photonics
Education:
Pusan National University, BS in Mechanical Engineering, Feb 2023.
Student Intern at Samsung Electronics Mechatronics R&D Technology Center, Jul - Aug 2022.
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Junyong Choi (최준용)
Master student [Mar 2023 - Present]
Working on feedback control and stabilization for frequency combs
Education:
Hanyang University, BS in Mechanical Engineering, Feb 2023.
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Hyungsoo Choi (최형수)
PhD student [Sep 2023 - Present]
Working on comb-based 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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Woosong Jeong (정우송)
Master student [Mar 2024 - Present]
Working on vibration-insensitive design of laser stabilization module
Education:
Inha University, BS in Mechanical Engineering, Feb 2024.
Illinois Institute of Technology (USA), Exchange Student [Sep 2022-Jan 2023]
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Administrative Staff
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