直播時間：2023年5月19日（周五）20:00-21:30
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https://weibo.com/l/wblive/p/show/1022:2321324903135859835105（科學網(wǎng)微博直播間鏈接）
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北京時間2023年5月19日晚八點，iCANX Talks 第144期，本期邀請到中國科學院長春光機所&德國柏林工業(yè)大學王大同（Dieter Bimberg）教授進行分享綠色數(shù)據(jù)通信：5G之后的下一個挑戰(zhàn)。
【嘉賓介紹】
Dieter Bimberg
王大同
CAS at CIOMP&Technical University of Berlin
Green Data Communication: The Next Challenge after 5G
【Abstract】
Since 2014 novel consumer applications like Netflix, Block Chain,… not known to appear at the horizon at that time have led to a huge increase of internet traffic of 60%/year, much more than then originally predicted by companies like Cisco. This increased use of the internet is increasing its electrical power consumption due to increased data traffic mostly inside data centers. New data centers have crossed the 500 MW level. 5G with its big jump in data speed will be another enabler for new services, like LIDAR and more we cannot think about yet, and will increase the energy consumption to an extent not further tolerable. More research has to be done on the energy-efficiency of data traffic on all hierarchy levels.
2014年以來，Netflix、區(qū)塊鏈等當時鮮為人知的新型消費應用使得互聯(lián)網(wǎng)流量正以每年60%的速度大幅增長，遠遠超過當初思科等公司的預測。由于數(shù)據(jù)中心的數(shù)據(jù)流量需求增長，互聯(lián)網(wǎng)的大量使用增加了電力的消耗。新的數(shù)據(jù)中心的能耗已超過500兆瓦。5G數(shù)據(jù)速度的大幅度提升將成為新應用的另一個推動因素，如激光雷達等我們還無法想象的，這進一步將能源消耗提高到了極高的程度。我們亟需對各層級數(shù)據(jù)流量的能源效率開展更深入的研究。
Inside data centers advanced design of active optical cables, their electronic driver and receiver circuits and the active photonic devices are suddenly in the focus, with the goal to minimize their combined power consumption. Vertical-cavity surface-emitting lasers (VCSELs) for 200+ Gbit/s single fiber data transmission across OM5 multimode fiber with a record heat to bit rate ratio (HBR) of only 240 fJ/bit x wavelength @ 50Gbit/s developed in our labs are presented.
為了實現(xiàn)綜合功耗最小化，數(shù)據(jù)中心內的有源光纜及其電子驅動和接收電路，和有源光子器件的先進設計驟然成為研究熱點。我將介紹我們實驗室開發(fā)的垂直腔面發(fā)射激光器（VCSELs），我們在OM5多模光纖上實現(xiàn)了200+ Gbit/s的單光纖數(shù)據(jù)傳輸速率，其熱比特率（HBR）創(chuàng)下紀錄，在50 Gbit/s的傳輸速率下僅為240 fJ/bit。
We recently discovered photon lifetime management to be the key to adopt the overall energy consumption to the bit rate of the data traffic (e.g. 25 Gb/s, 50 Gb/s,..). Completely novel GaAs VCSEL designs based on oxidizing apertures from dry etched holes filled subsequently with metal are presented. Much better heat dissipation leads to much larger saturation currents, larger output power and larger 3 dB cut-off frequencies. Single mode multiplexing and easy polarized emission is enabled. The novel approach is covered by multiple worldwide patents.
近期，我們發(fā)現(xiàn)調控光子壽命是降低特定數(shù)據(jù)流量（例如25Gb/s、50Gb/s等）下總體能耗的關鍵。我們基于干法蝕刻氧化物孔和進一步的金屬填充，提出了全新的砷化鎵VCSEL設計。這一設計提升了散熱性能，可以得到更大的飽和電流、更大的輸出功率和更大的3dB截止頻率，并且能夠同時實現(xiàn)單模復用和簡單的偏振發(fā)射。這種新方法已擁有多項國際專利。
【BIOGRAPHY】
Dieter Bimberg received the Ph.D. magna cum laude from Goethe University, Frankfurt, Germany. He held a Principal Scientist position at the Max Planck-Institute for Solid State Research, Grenoble, France, until 1979. After serving as a Professor of electrical engineering, Technical University of Aachen, Germany, he assumed the Chair of Applied Solid-State Physics at Technical University of Berlin. He is the Founding Director of its Center of Nanophotonics. He hold guest professorships at the Technion, Haifa, U.C. Santa Barbara, CA, USA, and at Hewlett-Packard in Palo Alto, CA. He was Distinguished Adjunct Professor at KAU, Jeddah 2012-2018. In 2018 he assumed the directorship of the “Bimberg Chinese German Center for Green Photonics” of the Chinese Academy of Sciences at CIOMP, Changchun.
Dieter Bimberg院士在德國歌德大學獲得博士學位。1979年以前，他曾在法國格勒諾布爾的馬克斯·普朗克固體研究所擔任首席科學家。在德國亞琛工業(yè)大學擔任電氣工程教授后，他擔任柏林工業(yè)大學應用物理學系主任。他是其納米光子學中心的創(chuàng)始主任。他曾在以色列理工學院、美國加州大學圣巴巴拉分校和惠普公司擔任客座教授。2012-2018年，他在沙特阿拉伯阿卜杜勒阿齊茲國王大學擔任杰出兼任教授。2018年，他開始擔任中國科學院長春光機所Bimberg中德綠色光子學研究中心的主任。
He is a member of the German Academy of Sciences Leopoldina, the EU Academy of Sciences, a Foreign Member of the Russian Academy of Sciences, the US Academies of Engineering and of Inventors, a Life Fellow of the American Physical Society and the Institute of Electrical and Electronics Engineers, IEEE, and a fellow of Chinese Optical Society. He is recipient of multiple international awards, like the UNESCO Nanoscience Award, the Max-Born Award and Medal of IoP and DPG, the Heinrich-Welker-Award, the Nick Holonyak Jr. Award, the Oyo Buturi and MOC Awards of the Japanese Society of Applied Physics, the Jun-Ichi Nishizawa Medal and Award of IEEE, and the Stern-Gerlach Award of DPG, to mention a few. He received honorary doctorates of the University of Lancaster, UK, and the St. Petersburg University of the Russian Academy of Sciences.
他是德國科學院院士、歐盟科學院院士、俄羅斯科學院外籍院士、美國工程院院士、美國發(fā)明院院士、美國物理學會終身會士、電氣電子工程師學會終身會士和中國光學學會會士。他獲得過多個國際獎項，如聯(lián)合國教科文組織納米科學獎、IOP和DPG聯(lián)合頒發(fā)的馬克斯-玻恩獎、Heinrich-Welker獎、Nick Holonyak Jr.獎、日本應用物理學會的Oyo Buturi和MOC獎、IEEE的Jun-Ichi Nishizawa獎，以及DPG的Stern-Gerlach獎等等。他還獲得了英國蘭卡斯特大學和俄羅斯科學院圣彼得堡大學的榮譽博士學位。
He has authored more than 1500 papers, 71 patents and present applications, and six books. The number of times his research works has been cited exceeds 67,000 and his Hirsch factor is 113. His research interests include physics and technology of nanostructures, nanostructured photonic and electronic devices, and energy efficient data communication.
他發(fā)表了超過1500篇論文、71項專利和6本書，被引用量超過67000次，H因子高達113。他的研究興趣包括納米結構物理與技術、納米結構光子與電子器件以及節(jié)能數(shù)據(jù)通信。
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