直播时间：2023年5月19日（周五）20:00-21:30

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北京时间2023年5月19日晚八点，iCANX Talks 第144期，本期邀请到中国科学院长春光机所&德国柏林工业大学王大同（Dieter Bimberg）教授进行分享绿色数据通信：5G之后的下一个挑战。

【嘉宾介绍】

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年以来，Netflix、区块链等当时鲜为人知的新型消费应用使得互联网流量正以每年60%的速度大幅增长，远远超过当初思科等公司的预测。由于数据中心的数据流量需求增长，互联网的大量使用增加了电力的消耗。新的数据中心的能耗已超过500兆瓦。5G数据速度的大幅度提升将成为新应用的另一个推动因素，如激光雷达等我们还无法想象的，这进一步将能源消耗提高到了极高的程度。我们亟需对各层级数据流量的能源效率开展更深入的研究。

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.

为了实现综合功耗最小化，数据中心内的有源光缆及其电子驱动和接收电路，和有源光子器件的先进设计骤然成为研究热点。我将介绍我们实验室开发的垂直腔面发射激光器（VCSELs），我们在OM5多模光纤上实现了200+ Gbit/s的单光纤数据传输速率，其热比特率（HBR）创下纪录，在50 Gbit/s的传输速率下仅为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，我们发现调控光子寿命是降低特定数据流量（例如25Gb/s、50Gb/s等）下总体能耗的关键。我们基于干法蚀刻氧化物孔和进一步的金属填充，提出了全新的砷化镓VCSEL设计。这一设计提升了散热性能，可以得到更大的饱和电流、更大的输出功率和更大的3dB截止频率，并且能够同时实现单模复用和简单的偏振发射。这种新方法已拥有多项国际专利。

【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院士在德国歌德大学获得博士学位。1979年以前，他曾在法国格勒诺布尔的马克斯·普朗克固体研究所担任首席科学家。在德国亚琛工业大学担任电气工程教授后，他担任柏林工业大学应用物理学系主任。他是其纳米光子学中心的创始主任。他曾在以色列理工学院、美国加州大学圣巴巴拉分校和惠普公司担任客座教授。2012-2018年，他在沙特阿拉伯阿卜杜勒阿齐兹国王大学担任杰出兼任教授。2018年，他开始担任中国科学院长春光机所Bimberg中德绿色光子学研究中心的主任。

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 internationalawards, 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.

他是德国科学院院士、欧盟科学院院士、俄罗斯科学院外籍院士、美国工程院院士、美国发明院院士、美国物理学会终身会士、电气电子工程师学会终身会士和中国光学学会会士。他获得过多个国际奖项，如联合国教科文组织纳米科学奖、IOP和DPG联合颁发的马克斯-玻恩奖、Heinrich-Welker奖、Nick Holonyak Jr.奖、日本应用物理学会的Oyo Buturi和MOC奖、IEEE的Jun-Ichi Nishizawa奖，以及DPG的Stern-Gerlach奖等等。他还获得了英国兰卡斯特大学和俄罗斯科学院圣彼得堡大学的荣誉博士学位。

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.

他发表了超过1500篇论文、71项专利和6本书，被引用量超过67000次，H因子高达113。他的研究兴趣包括纳米结构物理与技术、纳米结构光子与电子器件以及节能数据通信。