Dr. Liang’s Lecture – Si Photonics for Data Centers and Beyond

Dr. Liang’s Lecture – Si Photonics for Data Centers and Beyond

– OSA Traveling Lecture at student chapter at Zhejiang University

On Nov.  2015, OSA student chapter at Zhejiang University was honored to invite  Di Liang, a research scientist at Hewlett Packard Labs, to have a friendly visit to our Centre of Optical and Electromagnetic Research through the OSA traveling lecture program. At 9:30 a.m., Dr. Liang gave a remarkable lecture entitled “Si Photonics for Data Centers and Beyond”. Members in our student chapter together with the researchers here were present at the seminar. Through the Traveling Lecture, we all benefited a lot from the academic research as well as the industry development.


(Dr. Liang from Hewlett Packard Labs is beginning his report)

To start with the seminar, Hao Wu, president of our student chapter, briefly introduced the research experience and outstanding achievements of Dr. Liang. Afterwards, Dr. Liang gave a detailed talk about the work on Si photonics interconnects for HP data centers. The overall effort and the roadmap of Hewlett Packard Labs on Si photonics were reviewed. Key components in the Si photonics link, including hybrid microring lasers, Si microring modulators, hybrid Si photodectors and SiGe APDs, were introduced and discussed in details. To sum up, Dr. Liang generalized not only technical obstacles but also market outlook about Si photonics interconnects.


(A group photo of discussion during FAQs section:Dr. Liang is sharing his opinions)

In the FAQs section, Prof. Shiming Gao and Assoc. Prof. Yaocheng Shi discussed with Dr. Liang about the most promising bonding technology with silicon. Futher in-depth discussions in free bonding were followed. Members in our student chapter took an active part in this section and concerned about the commercial applications and development. Dr. Liang discussed it according to current nanofabrication and hybrid bonding technology from the perspective of a research scientist at HP Labs.


(A group photo of Dr. Liang, Assoc. Prof. Shi and part of the attendees in our student chapter)

The Traveling Lecture from OSA did broaden our horizon and advance us to higher research level. Our student chapter are looking forward to the next Traveling Lecture.

Article by Jing Jia (jiajing_tju@163.com)

Photos by Xiaoman Shen (shxm@zju.edu.cn) and Jingwei Li (lijingwei@coer-zju.org)

Tell You a Story about Light, Different from the Textbook

Tell You a Story about Light, Different from the Textbook

– Youth Education Activity of OSA student chapter at Zhejiang University

On July 8th 2015, the OSA student chapter at Zhejiang University organized a youth education activity, inviting some of the first-year students from Hangzhou Changhe High School (http://www.hzchgz.cn/). Most of the students came from poor families, who had less education resources. Our event aimed at providing access to interesting and basic optics knowledge, meanwhile inspiring them to explore in the field of optics. The event was also supported by SPIE and IEEE student chapter at Zhejiang University.


(Group photo of students from Changhe High School and some of our members)

 The event was divided into 2 parts. Lectures delivered by our members gave the students a first glance of optics. Then the students were engaged in the experiments to gain practical experience of optical research.

The lecture began at 12:00 a.m. in the conference room of our center. Senling Zhang, an OSA member, gave a brief introduction to the college of optical science and engineering, along with the major of optical engineering. Jun Yuan, the president of IEEE student chapter at Zhejiang University, gave a talk about the development of optics. Christian Huygens, Isaac Newton, James Clerk Maxwell and Albert Einstein were introduced with their fundamental theory and great contribution. Students obtained a rough picture of optics through these lectures and some basic knowledge they might use in the following experiments.

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(Pictures of Senling Zhang and Jun Yuan giving lectures)

After lectures, students were divided into 10 groups, taking turns to join the different experiments. For each experiment, one member was in charge of explaining the principle, demonstrating the operation and instructing students to finish it by themselves. We had designed 9 basic experiments shown in the following table.

Description of Experiment Member in Charge
3D Vision Experiment Senling Zhang
Assembling of optoelectronic device Yi Suo
Surveillance by Laser Hao Wu
Transmission of Laser beam Xiong Yang
Assembling of optical lens (Microscope and telescope) Xianhe Sun
Modulation of spectrum to form pseudo-color Fei Gao & Ming Zhang
Newton’s ring Wanrong Ding
Polarization property of light Jichao Fu & Jun Yuan
Motion sensing with Kinect × 2 Yu Gong & Xianglian Feng

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(Students taking experiments of Modulation of spectrum to form pseudo-color and Assembling of optoelectronic device)

IMG_2964 IMG_2989
(Students taking experiments of Assembling of optoelectronic device and Polarization property of light)

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(Students taking experiments of Surveillance by Laser and a girl learning to use telescope)

 With the instruction of our members, students understood some basic optical theory through interesting and visualized experiments, which gave them a deep impression. Most of the students were so deeply attracted by different experiments that some students even did not want to leave after the gathering time.

Through this event, our chapter enhanced our friendship and long term cooperation relationship with Hangzhou Changhe High School. We shouldered our responsibility of youth education, spreading optics knowledge to more young students. Our members practiced their skills of presentation and communication with teenagers during this event.

Article by Hao Wu (leowu@zju.edu.cn)
Photo by Jingwei Li (lijingwei@coer-zju.org)