https://scholar.dgist.ac.kr/handle/20.500.11750/11778 2026-04-05T19:12:50Z https://scholar.dgist.ac.kr/handle/20.500.11750/59150 Title: Dimensional Tolerance Analysis for 50 GHz 12-Channel Silicon Arrayed Waveguide Grating Author(s): Vatandoust, Leila; Kim, Jae Hyeon; Gupta, Shashank; Tusher, Md Munirul Islam; Moon, Hyung-Myung; Merklein, Moritz; Han, Sangyoon; Quack, Niels Abstract: We present a dimensional tolerance analysis of a 12-channel Arrayed Waveguide Grating (AWG) with 50 GHz channel spacing, designed and fabricated on a silicon-oninsulator (SOI) platform. The AWG was simulated using RSoft BeamPROP. Experimental measurements revealed notable spectral deviations. To identify the origins, we evaluated the effects of fabrication-induced variations including waveguide width and height deviations and refractive index fluctuations. Dimensional tolerance simulations confirmed that these imperfections degrade Silicon AWG's performance, underscoring the importance of tolerance-aware design in silicon photonic integrated circuits (PICs). 2025-07-12T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/58934 Title: Programmable MZI Based on Si Photonic MEMS Tunable Delay Line Author(s): Hong, Myung Seok; Kim, Dong Uk; Lim, Min Gi; Choi, Dongju; Her, Man Jae; Park, Young Jae; Jeong, Youngjae; Park, Jongwoo; Han, Seungjun; Yu, Kyoungsik; Han, Sangyoon Abstract: We report on a programmable MZI based on Si photonic MEMS. The device can tune FSR (0.062-0.524 nm) as well as extinction ratio (1-16 dB). Static power consumption is less than 16 nW. © 2022 The Author(s) © IEEE 2022. 2022-08-03T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/57813 Title: Silicon Photonics MEMS Platform-based Optomechanical Ultrasound Sensor Array for 3D Photoacoustic Deep Brain Region Imaging Author(s): Nam, Sangwoo; Choi, Dongju; Han, Sangyoon; Yu, Jaesok Abstract: We propose a silicon photonic optomechanical ultrasound sensor array for 3D photoacoustic imaging of a mouse brain’s deep region. The performance evaluation and 3D photoacoustic in-vitro imaging were conducted for the feasibility study. © 2024 The Author (s). 2024-04-07T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/56812 Title: The Manipulation of Four-Wave Mixing in a Fully Tunable MEMS Photonic Molecule Author(s): Lim, Min Gi; Choi, Dong Ju; Kim, Dong Uk; Park, Young Jae; Yu, Kyoungsik; Han, Sangyoon; Jeong, Kwang-Yong Abstract: We demonstrated the manipulation of four-wave mixing (FWM) in a fully tunable photonic molecule implemented on low-power silicon photonic MEMS. A seeded FWM with a conversion efficiency of −56dB at 7.3dBm pump power was demonstrated. © Optica Publishing Group 2023, © 2023 The Author(s) 2023-10-08T15:00:00Z