|장소||E6-2 #1323 (1st floor)|
|일시||Sep. 29th(Thu), 4PM|
|연사||Dr. Sangyoon Han, Department of Physics, KAIST|
Large-scale Silicon Photonic MEMS Switches
Sep. 29th(Thu), 4PM, E6-2 #1323 (1st floor)
Dr. Sangyoon Han, Department of Physics, KAIST
Fast optical-circuit-switches (OCS) having a large number of ports can significantly enhance the performance and the efficiency of modern data centers by actively rearranging network patterns. Commercially available optical switches operating with the use of moving mirror arrays have port counts exceeding 100x100 and insertion losses fewer than a few dBs. However, their switching speeds are typically tens-of-milliseconds which limits their applications in highly dynamic traffic patterns.
Recently, optical switches based on silicon photonics technology have been designed and built. Silicon photonic switches with microsecond or nanosecond response times have been demonstrated, and silicon photonic switches with integrated CMOS driving circuits have been demonstrated. However, the demonstrations were mostly limited to a small number of ports due to their cascaded 2x2 architecture which induces high optical losses as port-count increases. Moreover, the demonstrations were limited to single polarization operations, and narrow spectral bandwidths.
In this talk, I will introduce a new architecture for silicon photonic switches that is highly scalable (optical insertion loss < 1 dB regardless of port-count), polarization-insensitive (< 1dB of PDL), and ultra-broadband (~300nm). The new architecture uses a two-level waveguide-crossbar with moving waveguide couplers that configure light paths. Three experimental implementations of the new architecture with 50x50 ports will be shown in the talk.
Sangyoon Han is a postdoctoral research associate in the Physics department at KAIST. He received his Ph.D. in Electrical Engineering and Computer Sciences from the University of California, Berkeley in 2016. He received his B.S. in Electrical Engineering from Seoul National University. He was a recipient of Korea Foundation for Advanced Studies Scholarship for study abroad, and he was a recipient of a graduate bronze medal from Collegiate Inventors Competition (USPTO sponsored) in 2015.
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|공지||2019/09/02 - 12/09||Seminar Room 1501||이호성 박사 (한국표준과학연구원) and etc.||Fall 2019: Physics Colloquium|
|30||2015/09/07, 3PM||E6-2. 1st fl. #1318||Dr. Jasbinder Sanghera (U.S. Naval Research Laboratory (NRL))||Advanced Optical Materials and Devices at NRL|
|29||2015/08/04, 11PM||B501, Room Red, KI bldg. 5nd fl.||Dr. Eric Jin Ser Lee(Univ. of Manitoba, Canada)||Propagation of ultrasound through two- and three-dimensional strongly scattering media|
|28||2015/08/03,10:30AM||E6-2, #1323 (Seminar Room)||Dr. Jonghee Yoo (Fermi National Accelerator Laboratory, USA )||Axion Search|
|27||2015/07/23,1:30PM||E4, B401||Prof. Gilles Lérondel (Univ. of Technology of Troyes)||Enhanced ZnO based UV photonics and related applications|
|26||2015/07/16-07/17||E6-2, 1501||Sang-Wook Cheong (Rutgers Univ.)||KAIST Physics Distinguished Lecture|
|25||2015/07/16, 4PM||E6-2, 1318||Dr. Kyunghan Hong(MIT)||Next-generation ultrafast laser technology for nonlinear optics and strong-field physics|
|24||2015/07/15, 2PM||E6-2,1323||Dr. Se Young Park(Rutgers Univ.)||Electronic and optical properties of titanate-based oxide superlattices|
|23||2015/06/03, 12PM||Room 101, E11||Prof. Min-Kyo, Seo & Hansuek, Lee(KAIST)||The First Wednesday Multidisciplinary Forum|
|22||2015/03/13, 2PM||Connect Room, KI Bldg.||The 15th Innovative Workshop on Soft/Bio Materials|
|21||2015/03/09-06/08||E6, 1501||최현용교수(연세대) 외12명||Physics Colloquium : 2015 Spring|
|20||2015/03/04, 12PM||1323호, E6-2||Prof. Choi Hak-Soo(Harvard)||Bioimaging and Biosensing Using Near-Infrared Fluorescence|
|19||2014/12/22, 2PM||E6, Rm1319||Prof. Changbong Hyeon (KIAS)||Dynamics of molecular motors: Power stroke vs Brownian ratchet|
|18||2014/05/28, PM5||KI Building, Matrix Hall||이웅범 대표이사(LG이노텍)||부품소재산업이 미래다|
|17||2014/03/10-06/09||E6, 1501||신용일교수(서울대)||Physics Colloquium : 2014 Spring|
|16||2013/09/09-12/09||E6, 1501||박혁규교수(부산대) 외||Physics Colloquium : 2013 Fall|
|15||2013/03/11-06/10||E6, 1501||강명수교수(KAIST) 외||Physics Colloquium : 2013 Spring|
|14||2012/04/02, 4PM||E6, 1501||Yong Hee Jeong||A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4|
|13||2012/02/13-05/14||E6, 1501||Kenji Ohmori (Photo-Molecular Science, IMS)||Physics Colloquium : 2012 Spring|
|12||2011/09/03-12/06||E6, 1501||김용균교수(한양대) 외||Physics Colloquium : 2011 Fall|
|11||2011/05/16, 4PM||E6, 1501||서민교교수(KAIST)||Photonics with surface plasmon polaritons|