All posts by Hao Wu

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 ( 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.

IMG_2895 IMG_2871
(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

IMG_2990 1
(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)

IMG_2953 IMG_2985
(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 (
Photo by Jingwei Li (






  1. 活动内容及安排:













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Join OSA and Illuminate Your Future

 –Chapter Promotion and Recruitment Event

In order to promote our chapter and attract more new members, we held a spring out. We chose LASER World of PHOTONICS CHINA in Shanghai as our destination to attract more freshmen major in optical engineering, since most of them are quite interesting in this exhibition. Meanwhile, we could visit the Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences (SIOM) and build our networking with the OSA student chapter at SIOM.

March 17, 2015, 11 members of the student chapter of the Optical Society of America (OSA) at Zhejiang University travelled to Shanghai to visit the LASER World of PHOTONICS CHINA and SIOM.

IMG_8825(Group photo at the gate of LASER World of PHOTONICS CHINA)

LASER World of PHOTONICS CHINA was held at the Shanghai New International Expo Center March 17-19. As Asia’s largest laser, optics, optoelectronics industry event, from basic research to industrial applications, LASER World of PHOTONICS CHINA lead the industrial trends, showcasing the full range of product, including lasers and photonics, optics and optical manufacturing, laser production and processing technologies, imaging, detection, and quality control. The exhibition attracted 715 exhibitors from 20 countries worldwide, showing their latest products, technologies and equipment.

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(Members at the exhibition hall)

As soon as the members stepped into the exhibition hall, they were attracted by all sorts of the exhibitions on display. In conventional optical exhibition, machine vision is undoubtedly a popular theme, which is usually used for production control and testing. The workshop on Machine Vision attracted a large number of participants. In laser and laser processing exhibition, all kinds of lasers, such as ultrafast lasers, high-power lasers, fiber lasers, semiconductor lasers, made the members appreciate the rapid development of laser industry. What the students saw gave them a more clear and comprehensive understanding of the practical applications of optoelectronic industry, which means a lot for their future research work.

(Members wandering at the Bund)

March 18, the members came to SIOM. Leading by the president of OSA student chapter at SIOM, we visited the Laboratory, which focuses on the Shenzhou Ⅱ project. They are now building the ninth laser road to enhance the power, which is important for fusion reaction. During the visit, some members communicated their ideas with the president of OSA chapter at SIOM in depth.

We came back to Hangzhou in the afternoon of March 18. This visit to Shanghai broadened our horizon of the optical technology and industry, also gave us a chance to get in touch with the research of SIOM.

Through this activity, we attracted 11 more new members to our chapter. Additionally, we met with the OSA student chapter at SIOM and exchange our experience in holding activities.

IMG_8919IMG_8939 IMG_8922
(Members visiting SIOM)

Article is by Xiaoman Shen (
Photos are by Hao Wu (

Enrich Your Understranding of Science & the Light

– Youth Education activity of OSA Student Chapter at ZJU

On Jan. 1st 2015, the OSA student chapter at Zhejiang University organized a communication activity with teachers and students in Changhe Senior High School ( located in the outskirts of Hangzhou city, aiming at sharing the studying experience and life in high school and the university, meanwhile give them an introduction to the Optical Engineering and basic optical knowledge. Twenty of us arrived at the school at 2:30 p.m. We have a meeting first to assign our members to different classes.

IMG_0922(Members are being trained to communicate with high school students)

The whole activity was divided into two parts. One was a psychological training program which was a new part this year, and the other was in-class lectures focusing on two different topics. One of the topic was to share the study experience and information of Optical Engineering and the other was concentrated on the psychological health, including teaching them to reduce the pressure during the study and examination, which is also a new topic this year.

During the psychological training activity, we had a training program to reduce the pressure during the preparation of coming College Entrance Examination, meanwhile increase their energy and concentration. Two students were picked up from every class and were divided into 4 groups. After an interactive game, everyone joined in and our members got familiar with each other immediately. Then, the students were encourage to give a talk about how to prepare for the College Entrance Examination at the subject which they were good at. At last, we give some demonstrative experiment of optics using optical suitcase, in which students had been excited from the interesting phenomena. Xiaoyan Wang, the former president of OSA student chapter at Zhejiang University, together with Borui Li, another member of OSA, distributed the equipments in the optical suitcase to the students. With the help of equipment, they explained the polarization, dispersion, diffraction of light to these high school students. Everyone was attracted by the interesting experiment and their vivid explanation. They were not willing to leave even when the time was up, so that the activity was extend for extra 20 minutes.

IMG_0986 IMG_1091(The participants were joining in the interactive game to get familiar with each other. The participants were attracted by the optical experiments)

IMG_1111(The group photo of the participants in the psychological training activity)

For the in-class lectures, our members were distributed to each class. We did not determine the content of the lecture, require members to concentrate on the topics we had mentioned above. As an example, Xiong Yang mainly introduced to these students about the colorful life in the university, in order to encourage the students to work hard and get enrolled by their dream universities. Shipeng Wang focused on his own experience during the study in high school. He suggested that students should not only engage themselves in the sea of examination papers, but also summarize and introspect themselves immediately after the exams. Keqi Ma and Penghao Liu introduced the optical knowledge and the Optical Engineering which we majored in to the students. There was a Q. & A. session after each lecture. Students from Changhe High School were so eager to ask all kinds of questions from the study in high schools and life in universities that some of our members even missed our time of gathering.

IMG_1006 IMG_1030(Wanrong Ding was giving a lecture on psychological health)

IMG_1075 1(Xiong Yang was talking about the life in university and Keqi Ma was explaining the periodic table of elements)

Through this activity for the Changhe Senior High School, the students had expanded their horizons, particularly in the Optical Engineering. They were highly encouraged to work hard for the coming University Entrance Examination, and were taught methods to solve the problems and overcome the problems they might met in the future. Our members also established the contact with the students, so that the students can get help after the activity was over. We are looking forward to cooperate with the members at Changhe Senior High School next time.

Every student in Changhe Senior High participated in the activity were asked to fill in a questionnaire to give a feedback to our activity. Almost every student was satisfied with our activity and was willing take part in again. More results of the questionnaire will be shown on our website.


(The group photo of the participants from Zhejiang University and a teacher from Changhe Senior High School)

Article by Ming Zhang ( &
Hao Wu (

Photo by Jingwei Li (

Lights up hope & Enrich Understanding of science

– Youth Educations activity of OSA Student Chapter at ZJU

Aiming at spread optical scientific knowledge & stimulate teenagers’ interest, on July 7, OSA and SPIE student chapters at Zhejiang University, the Swedish undergraduate exchange students and the students from Changhe High School located far from Zhejiang University jointly organized the third youth educations activity named “Lights up hope & Enrich understanding of science”.

This is cooperation after a series of activities such as science camp activities sponsored by OSA Chapter in ZJU last July; members visited Changhe High School, and shared with graduating students face to face last December. The public welfare activity aims to disseminate knowledge of optics, and inspire high school students of scientific dreams, which is another pace at the public road of our chapter. This activity also provides an opportunity for members close contact with the optical manufacturing and processing enterprises scene, processes, operation mode, promote understanding and awareness of the optical industry.

1(A group photo of the students from Changhe High School)

Through last two years’ cooperation, the camping activity was highly estimated among the high school students and their teachers, so more participants came to our school this time. All the volunteers from our chapter held a meeting to arrange the timing and staffing duties. The meeting lasted for one hours. On July 7, 8:30 a.m., nearly ninety high school students with their teachers from Changhe High School arrived our Zhejiang University, Zijingang Campus by bus. The East BLDG #5 hanged the banners writing “Warm welcome to guests from Changhe High School” in both English and Chinese. Our members led the teenagers into the main venue in building #5, and distributed everyone luncheon voucher, souvenir pen and notebook with the words of Zhejiang University and mineral water.

2(A glimpse of the welcome party)

Firstly, Mr. Chen from Changhe School expressed their thanks to our chapter, and made a brief review of the close relationships between the two schools. He encouraged the teenagers being more active in giving feedback. Subsequently, the host Senlin Zhang gave a welcoming speech and briefly introduced activity process as well as the research contents of opening laboratory. Then Dr. Pengfei Kou gave a brief science knowledge introduction, about “Develop novel solar energy and drive the future life”. There is an interesting part that two Swedish student from Royal Institute of Technology (KTH), who are going on a research summer camp here. Robert introduced their different life in the Swedish high school. “Are your homework assignments in high school too heavy?”, ”What kinds of activities and communities can you participate in your university?” Such questions attracted these high school students’ attention.

Following is visiting laboratories. The volunteers of OSA student chapter at Zhejiang University were divided into six groups and led the high school students visited the Clean Room, Network Lab, Grating Lab Laser Lab, Bio photonics Lab and Laser Spectroscopy Lab. The all experiments and stories were introduced in interesting way and the explanation was adaptive to the understanding of the teenagers. Rainbow phenomenon by the prism, alternate change for brightness and darkness by the polarizers, and such experiments were carefully designed and explained to the teenagers appropriately. They were also encouraged to do what they are fancy with. As a good circumstance, the senior students asked questions actively, and participated in discussions.

3 4(Members are explaining experiments)

5 6(High School Students Show Great Interests)

After lunch they were taken to walk-around in the campus. Many of them wondered the contents different subjects studying. Then we set off for a visit to the Hangzhou Silan Microelectronics Co. Ltd. along with the students from KTH. The officers of the company gave us a warm welcome.

An engineer from Hangzhou Silan Integrated Circuits Co. Ltd. gave a report about the integrated circuits fabrication. First of all, he briefly introduced the fundamental knowledge of the semiconductor chips. Then, he presented the current manufacture level of the Silan Integrated Circuts Co. Ltd. Finally, a video about the standard CMOS production process was shown to make the students better understand the integrated circuits industry.

Next, an engineer from Hangzhou Silan Azure Co. Ltd. gave us a report about the LED products of the company. First of all, he introduced their fabrications from the LED arrays at the Tiananmen Square to the LED lights used on many occasions. Secondly, a brief fabrication process of LED was showed. Finally, he made an outlook about the future development of the LED manufacturing industry and LED markets.

After a whole afternoon visit, we returned to school by bus. We had a better understanding about the integrated circuits and LEDs, attributing to this activity.

7(The high school students, Swedish undergraduates and our members are visiting optical communications industry)

8(A group photo for part of the high school students and members of our chapter in Silan Microelectronics Co. Ltd)

The activities focusing on teenagers’ education held successfully with OSA & SPIE members together. As a good consequence, we have made friends with the teenagers, and made a good relationship with Changhe High school. Through this activity, OSA student Chapter at Zhejiang University serves the society in the new form of knowledge and skills. We have the faith to continue going further popularization of science among young people.

Article is by Hongyan Liu ( &
Hao Wu (
Photos are by Hao Wu & Senlin Zhang (


Make Your Presentation More Attractive

–Sharing session of OSA Student Chapter at ZJU

Making presentation is an essential and necessary skill in our study and work area. As a useful tool, PowerPoint prepared meticulously can show our ideas better to the audience. Along with more members attending academic conference presentations, to help them do better, the OSA Student Chapter at Zhejiang University held “the Sharing of PPT Design” on June 21st, 2014, in our research center.

As the invited guest, Dr. Hongze Lin once studied in the “Studio of Design and Innovation”, which was launch in December 2008 by Kezhen Zhu department of Zhejiang University, and recruit only 40 students each year. Dr. Hongze Lin have a deeper involvement in PPT organize and design.

1(A group photo of all the attendees for the sharing session)

At 2:00 p.m., the sharing session began. “Designing is a simple thing.” At the beginning, Dr. Hongze Lin actually set a relaxing tone for the entire presentation. He introduced the experience from several aspects: examples for front cover; the use of plate; the font & color. In each aspect, he expressed his own insights and illustrated his past PPT work. At last, he recommended us some books & websites, and encourage us to abandon the template, try more other styles, and finally find our own feelings. In the next Q&A section, Dr. Hongze Lin communicated patiently with other members.

21(Dr. Hongze Lin was answering the questions)

After the session, many members said benefit a lot from the sharing, and look forward to more activities related to the study and research. We chapter will do our best to give more chances to capable members to show themselves and also help others among our chapter, or more widely range.

Enrich Your Understanding of Industries & Scientific Research

-visit to Shanghai of OSA Student Chapter at ZJU

In the beginning God created the heaven and the earth. And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters. And God said, Let there be light: and there was light (Genesis).

On March 18th, 2014, 25 members of the student chapter of the Optical Society of America (OSA) at Zhejiang University paid a visit to LASER World of PHOTONICS CHINA held in Shanghai, China. On the following day, we organized friendly joint with the OSA student chapter at East China Normal University and visited the State Key Laboratory of Precision Spectroscopy (LPS).
LASER World of PHOTONICS CHINA, which is the leading regional trade fair for optical technologies in China, was held during March 18th to 20th, 2014 at the Shanghai New International Expo Center by Messe München International. 628 exhibitors from 22 countries booked an unprecedented 34,500 square meters of floor space, and up to 37,272 visitors went to the exhibition. The products covered a variety of research areas, including laser technology and photoelectron, optics and optical manufacturing, production and processing technology of laser, imaging, testing and quality control.

1(A group photo of all the attendees for the exhibition)

The members of OSA at Zhejiang University arrived at the Shanghai New International Expo Center around 1:00pm. As soon as we stepped into the exhibition hall, our members were attracted by all sorts of the exhibits on display. Though we were not coming with the bulk orders, the exhibitors introduced their products and answered our questions with great enthusiasm and patient. After a three and a half hours visiting, we left the Shanghai New International Expo Center at 4:30pm with great benefit. All the products we saw made us have more confidence in the development of the optical and laser industry and research work we engaged in.

2(A photo of the members exchanging with exhibitors)

On March 19th, we had a friendly visit to the OSA student chapter at East China Normal University as planned. On that morning, the president of two OSA chapters shared the student activities and the experience in the last year. The members of both chapters also discussed the major research areas they worked on. In the afternoon, we had a visit to the State Key Laboratory of Precision Spectroscopy by the lead of the OSA members at East China Normal University. This lab focuses on the precise spectroscopy in frequency domain, precise spectroscopy of atoms and molecules, ultra-sensitive spectroscopy, cross-over frontier study and application of precise spectroscopy and advanced theoretical work of precise spectroscopy. Some members have a deep talk with the researchers there on relative projects.

3(A photo of members from OSA@ZJU and OSA@ECNU in front of Science Building)

With discussion about the experience in these two days on the whole return trip, we came back to Zhejiang University in the evening of 19th Mar. 2014. The visit to the LASER World of PHOTONICS CHINA broadened our horizon of the optical technology and industry, and the visit to East China Normal University gave us a chance to get in touch with the research of precise spectroscopy. We all look forward to attending the LASER World of PHOTONICS CHINA with our own products someday.

Article is by Hao Wu (
Photos are by Hao Wu (

OSA Fellow Lecture from Dr. Cun-Zheng Ning to OSA Student Chapter at Zhejiang University

On Dec. 4 2013, OSA student chapter at Zhejiang University was so honored to have Dr. Cun-Zheng Ning, one extraordinary researcher in nanolaser realm, gave a friendly visit to our Centre of Electromagnetic and Optical Research. At 9 o’clock, our Prof. Sailing He led Dr. Ning to visit our laboratories and exchanged the research points. Following, Dr. Ning gave an excellent lecture to our OSA student chapter as part of the OSA Traveling Lecture. Members of our chapter and the researchers here were present at the seminar.

Ning_Travelling lecture_2

At the beginning of the workshop, our president, Lin Yang, briefly introduced the research experience and outstanding works of Dr. Ning. Thereafter, Dr. Ning simply came straight to the point of the reasons why scientists endeavor in the research of nanolasers. Some applications and priorities to common lasers were enumerated by Dr. Ning followed by the roadmap and physical mechanism of the nanolasers utilizing metallic cavity. The goals of designing nanolasers were listed and the subsequent parts of the presentation were all about the arduous efforts to realize nanolasers with continuous wave operated in room temperature under electrical injection.

In the FAQs section, Prof. Sailing He and Prof. Daoxin Dai had an interaction with Dr. Ning about the physical limits of the nanolasers’ performance. Other issues, such as implementing nanolasers in visible wavelength and the idea substituting heavily doped semiconductors for metal, were raised by our members subsequently. Dr. Ning discussed and answerd questions patiently.

Both the mentors and our student members benefit a lot from the discourse of Dr. Ning and we do yearn for more such traveling lectures from OSA.

Ning_Travelling lecture_1

Join Us & Enjoy the Life

-New Recruitment of OSA Student Chapter at ZJU

In order to greet new enrolled graduates and absorb more members, on Nov 23-24, Optical Society of America (OSA) at Zhejiang University Student Chapter organized a new recruitment by organizing a visit to Huzhou located from Hangzhou. About 27 members of the chapter participated actively and spent a happy weekend together. We chapter reimbursed all expense as a welfare of membership.

1(A group photo for all the attendees for the activity)

With the arrangement of the previous day, at 6:30 a.m. on the 23rd, 27 members from Center for Optical and Electromagnetic Research of ZJU congregated and then went to Hangzhou Railway Station together. Along the way we felt very excited, the bus is also unimpeded. We took the D5604 train to Huzhou. At 9:30 a.m., we arrived at Huzhou city and went straight to the TieFo Temple founded in 713 AD. After this visit, we had a typical lunch full of local features, the Wonton and buns which were two of “Huzhou four famous dessert”.

2(Members are having lunch at one famous local restaurant)

Following the delicious lunch and happy communication, the Museum of Chinese writing brush from Huzhou was our second destination. Huzhou writing brush, one of the “the four precious articles of the writing table”, is an important symbol of brilliant Chinese civilization. The diverse display shows the inheritance and development of Chinese culture, many members were attracted by the paintings and calligraphy exhibition of masterpieces. In the sunny afternoon, going sightseeing a local famous park was a wonderful choice for us. Members had a relaxing strolling and got a lot better at knowing each other.

3(A group photo for the attendees in front of the museum)

At 4:00 p.m., all attendees took bus to the ancient town named Nanxun, and made accommodation, all arranged by the organizers in perfect order.

On 23rd night, according to the arrangements, we hold a meeting about the change of state leadership. Through investigation and vote, former Treasurer, Xiaoyan Wang was honored to be the new President of our student chapter. The four former officers reported the past year working and highly praised Xiaoyan Wang’ efforts, which was also recognized by attending members. It’s deeply believed that under her leadership, OSA Student Chapter at Zhejiang University will benefits members more opportunities and even broader exchange platform, do more for also the society and go further.

The next day saw the wonderful travel around Nanxun Ancient Town that is one of the “Chinese Six Famous Ancient Towns”. Here are many monuments, which are in harmony with natural beauty, full of historical and cultural heritage and aura. Discovering the residence of an ancient culture is also part of the pleasure that awaits the traveling visitor. Because of less commercial atmosphere, the Town is suitable for members to enjoy the scenery and happy life.

(A group photo for the attendees at Nanxun Town)

At 3:00 p.m., we returned back to Hangzhou, and two days of travel visit to Huzhou came to a successful conclusion.

After the recruitment, our OSA Student Chapter at Zhejiang University is standing on the new starting point for development. We look forward to the future.

Article is by Hongyan Liu ( and
Hao Wu (
Photos are by Hao Wu (





Members Attending ACP Conference

During 12nd to 15th Nov. 2013, seven members from Optical Society of America (OSA) at Zhejiang University Student Chapter attended Asia Communication and Photonics Conference (ACP) in Beijing. Through learning talks from outstanding scientists and experts and communicating with students from all over the world, we benefited much not only on academic research but also the industry opinions.

ACP is the premier conference in the Asia-Pacific region on photonics and relevant technologies including photonic materials and devices, communication and network technologies, sensing technologies, biophotonic technologies, illumination technologies, and other photonic technologies regarding energy issues. In ACP/IPOC’2013, a special symposium in memory of beloved Dr. Yingye Li was organized. As the former chair of OSA and world-known expert on optical communication, he visited Zhejiang University and fortunately gave our chapter a special visit because of the care for OSA and young researchers. Members attended the conference widened horizon greatly since we involved in different workshops on our own fields.

1(A group photo for two members with On-site registration staff of OSA)

On 11st Nov. before the conference, the chapter held a sodality with OSA student chapter at South China Normal University (SCNU) to the Summer Palace. As one of the art treasure of Chinese Ancient Parks, the summer palace has not only important aesthetic and historical value, but also necessary ecological values. With the friendship established at last year ACP conference in Guangzhou, members from the two chapters visited the palace and discussed how to foster a one-class chapter. In the meanwhile, our members discussed some scientific topics with our friends, since we had similar but not totally same research areas.

2(A group photo for part of the members from the two chapters)

This journey to Beijing was proven to be a nice one by all accounts. We talked with scholars from different places and exchanged experiences in ideas, simulations, experiments, and so on, which turned to be an unforgettable experience to us.

It’s worth mentioning that besides the journey in Beijing, Hongyan Liu, secretary of the chapter visited to Tianjin and gave a conversation with the students from Tianjin University who would like to form an OSA Student Chapter in their university. She introduced the status of chapter at Zhejiang University, the procedure and essential condition for a new OSA student chapter; what is more, she shared her experience in organizing activities patiently. Considering the enthusiastic students were sophomore students, lack of sufficient professional knowledge and laboratory support, she suggested them to build up a close cooperative relation with the chapter at Nankai University located next to Tianjin University, and also kept in touch with our Zhejiang University chapter for further help and longtime relationship.

Article is by Hongyan Liu (