https://scholar.dgist.ac.kr/handle/20.500.11750/11776 2026-04-04T11:17:56Z https://scholar.dgist.ac.kr/handle/20.500.11750/59188 Title: REFLECTED OPTICAL WAVELENGTH SCANNING DEVICE PROVIDED WITH SILICON PHOTONIC INTERROGATOR Author(s): 문형명; 한상윤 Abstract: The present invention provides a reflected optical wavelength scanning device provided with a silicon photonic interrogator. The device may comprise: a light source module which outputs broadband light; an optical sensor which receives, through a circulator, the light outputted from the light source module, reflects light of a specific band to the circulator, and transmits light of the other bands other than the specific band; and an interrogator which separates polarized light from the reflected light received through the circulator, and enables the selective incidence of the polarized light. 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/20.500.11750/58822 Title: Programmable photonic circuit Author(s): 유경식; 한상윤 Abstract: A programmable photonic circuit is provided that includes a dimmable optical coupler, an optical phase shifter, and a control unit. The first and second waveguides are disposed in first portions corresponding to each other in a dimmable coupler, the dimmable coupler including a first actuator to adjust an optical coupling efficiency of an optical signal between the first and second waveguides. One of the first and second waveguides and the disturbing waveguide are disposed in a second portion corresponding to each other in the optical phase shifter, and the optical phase shifter includes a second actuator, a perturbation waveguide is provided to vary a phase of an optical signal passing through the one waveguide by varying an effective refractive index of an optical mode of the one waveguide according to a gap between the one waveguide and the perturbation waveguide. The control unit controls drive signals applied to the first and second actuators.