https://scholar.dgist.ac.kr/handle/20.500.11750/11779 Sat, 04 Apr 2026 14:20:20 GMT 2026-04-04T14:20:20Z 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/20.500.11750/59188 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. https://scholar.dgist.ac.kr/handle/20.500.11750/58822 https://scholar.dgist.ac.kr/handle/20.500.11750/58752 Title: Multicast switch array and light beam direction adjusting device using same Author(s): 유경식; 한상윤 Abstract: The invention provides a multicast switch array and a multi-beam steering device using the multicast switch array. The beam steering apparatus includes: a switch array including a plurality of switches connected to a first waveguide into which light is input; and a plurality of grating couplers connected with the plurality of switches, where the plurality of switches are arranged in a row on the plane of the substrate along the first waveguide, and each of the plurality of switches provides a second waveguide for passing light to one of the plurality of grating couplers according to on/off of each switch. Therefore, large-scale multi-beam direction adjustment can be accurately carried out. https://scholar.dgist.ac.kr/handle/20.500.11750/58752 https://scholar.dgist.ac.kr/handle/20.500.11750/58439 Title: 멀티캐스트 스위치 어레이 및 이를 이용한 빔 조향 장치 Author(s): 한상윤; 유경식 Abstract: 멀티캐스트 스위치 어레이(Multicast Switch Array) 및 이를 이용한 멀티빔(multibeam) 조향 장치가 제공된다. 이로써 대규모 멀티빔을 정밀하게 조향가능하다. https://scholar.dgist.ac.kr/handle/20.500.11750/58439