|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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|290||2009/09/07-11/30||E6, 1501||이주영박사(KIAS) 외||Physics Colloquium : 2009 Fall|
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|288||2010/02/08-05/03||E6, 1501||최인수교수(서울대) 외||Physics Ciolloquium : 2010 Spring|
|287||2010/02/14-05/09||E6, 1501||황철주(주성엔지니어링 사장) 외||Physics Colloquium - 2011 Spring|
|286||2010/09/06-12/06||E6, 1501||조호진기자(조선일보) 외||Physics Colloquium : 2010 Fall|
|285||2011/05/16, 4PM||E6, 1501||서민교교수(KAIST)||Photonics with surface plasmon polaritons|
|284||2011/09/03-12/06||E6, 1501||김용균교수(한양대) 외||Physics Colloquium : 2011 Fall|
|283||2012/02/13-05/14||E6, 1501||Kenji Ohmori (Photo-Molecular Science, IMS)||Physics Colloquium : 2012 Spring|
|282||2012/04/02, 4PM||E6, 1501||Yong Hee Jeong||A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4|
|281||2013/03/11-06/10||E6, 1501||강명수교수(KAIST) 외||Physics Colloquium : 2013 Spring|
|280||2013/09/09-12/09||E6, 1501||박혁규교수(부산대) 외||Physics Colloquium : 2013 Fall|
|279||2014/03/10-06/09||E6, 1501||신용일교수(서울대)||Physics Colloquium : 2014 Spring|
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