We are at the forefront of the development of ultralow-noise optical frequency comb sources and their innovative timing applications spanning from synchronizing ultrafast quantum science and radio astronomy facilities through chip-scale microwave photonic systems to ultrafast 3D dynamics imaging.

Not only have our recent research findings been published in high-impact journals such as Nature Photonics, Nature Communications, Science Advances, Light: Science & Applications, and Optica, but they have also been actively applied in high-tech industries such as Quantum Technology (on-chip frequency synthesizers for portable quantum time sensors and timing for quantum links), ICT & AI (on-chip photonic clock distribution and data converters), Defense (photonics-based radars), and Semiconductor Manufacturing (sensing and imaging for semiconductor device manufacturing processes). Thanks to the multidisciplinary nature of our research, we also enjoy a wide range of domestic and international collaboration opportunities with academia, national labs, and industries.

Current on-going research projects include:

• Micro-comb-based ultralow-noise mm-wave generators (supported by NRF)
• Investigation of high-frequency jitter of micro-combs (collaboration with Chalmers; supported by NRF-SSF)
• Photonic signal generation and phase calibration for VLBI telescopes (collaboration with KASI, KRISS, KISTI; supported by NST-CAP and KASI)
• Integrated optical frequency synthesizers for quantum time sensors (collaboration with KRISS; supported by IITP)
• Rapid, precise and multifunctional LiDARs (supported by NRF-ERC)
• Rapid and precise TGV glass substrate metrology (supported by LG Innotek)
• Stress and defect detection in OLED glasses (supported by LG Display)
• Femtosecond laser-based semiconductor wafer metrology (supported by Samsung Electronics)

Come and visit our labs at KAIST to explore our fascinating research on ultralow-noise and compact optical frequency combs, as well as their exciting engineering and scientific applications! (originally created by our students to be shown at the IEEE Photonics Society Summer Topical Meetings 2022)