Since completing his PhD, Jungwon has established his own research group at the Korea Advanced Institute of Science and Technology (KAIST) with a focus on timing. At first, his group worked on the timing problems with frequency combs, ultimately showing the first quantum-limited, sub-100-attosecond-jitter fiber combs in 2011. Today, they focus on the precision timing applications of such ultralow-noise combs. Jungwon shares some examples: ultrafast and precise time-of-flight (TOF) sensing and dynamic 3D imaging, ultralow-noise microwave signal generation, electronic chip clocking, and radio astronomy telescope operation.

This field has been growing over the last decade, so it has been a rich exploration for Jungwon. He has enjoyed working in optics and photonics for its wide-ranging and real-world applications. He gets to work with all kinds of different scientists, like radio astronomy researchers installing frequency comb systems at their telescope sites and semiconductor industry professionals looking for metrology solutions.