Welcome to Ryu Laboratory
Meiji University

お知らせtopics

26 March 2025
A graduation ceremony and diploma presentation ceremony was held, with a total of eight students graduating: seven undergraduates and one master's student.













24 January 2025
Mr. Katsumata, a second-year master's student, presented a paper on the measurement of fiber chromatic dispersion and nonlinear coefficient at IEICE Tehnical Committee Meeting.


20 December 2024
We completed the end-of-term research presentation by seven third-year students. Afterward, the entire lab held a year-end party. Now is the time to focus on their graduation and master's theses.















21 October 2024
Prof. Ryu gave a plenary talk on the history of research and development of coherent optical communication at the 3rd International Conference and Expo on Lasers, Optics & Photonics held in Edinburgh, UK.

10 October 2024
Mr. Katsumata, a second-year master's student, presented a paper on optical phase noise measurement using coherent heterodyne detection at IEICE Tehnical Committee Meeting.

25 September 2024
Prof. Ryu presented a paper at ECOC 2024 held in Frankfurt, Germany on the phase noise measurement of optical signals using an optical delay interferometer.

12 September 2024
Professor Ryu presented a paper on the phase noise measurement of optical signals using an optical delay interferometer at IEICE National Convention.

23 August 2024
Professor Ryu presented a paper on the phase noise measurement of optical signals using an optical delay interferometer at IEICE Tehnical Committee Meeting.

6 August 2024
Prof. Ryu presented a paper at CLEO Pacific Rim 2024 held in Incheon, Korea on the phase noise measurement of optical signals using an optical delay interferometer.

4 April 2024
Seven new third-year students were newly assigned to the laboratory, and all members of the laboratory met. Afterwards, a commemorative photo was taken on the university campus.
















7 March 2024
Mr. Katsumata, a first-year master's student, presented a paper on optical phase noise measurement using coherent heterodyne detection at the IEICE General Conference.

13 February 2024
After the students successfully submitted their master's and graduation theses, we held a follow-up party at a restaurant near the university.














18 December 2023
One month has passed since the third-year students started their research.
We held the first research report session for the third-year students, and then the entire lab went to a year-end party.















15 Semtember 2023
Professor Ryu presented a paper on polarization fluctuation measurement using an optical delay interferometer at IEICE National Convention.

13 September 2023
Mr. Seitaibashi, a 2nd year master student, presented a paper on MIMO communication systems using visible light at IEICE National Convention.

28 August 2023
Professor Ryu presented a paper on continuous measurement of backscattered light in the time domain at IEICE Tehnical Committee Meeting.

4 July 2023
Mr. Seitaibashi, a 2nd year master student, presented a paper at OECC2023, an international conference on optoelectronics and optical communication held in Shanghai, China. In addition, the presented paper won the Best Poster Award.

31 May 2023
Professor Ryu's research results were press-released from Meiji University.

9 May 2023
At CLEO2023 (held in San Jose, USA), one of the world's largest international conferences related to optics, Prof. Ryu presented a paper on phase noise and polarization state measurement of optical signals using an optical delay interferometer.

1 May 2023
A paper by Prof. Ryu on continuous measurement of optical fiber backscattered light on the time axis has been published in IEEE Photonics Technology Letters.

4 April 2023
Seven new 3rd year students were assigned, and a kickoff meeting was held at the beginning of the school year. It was the first time in four years that we were able to take a commemorative photo with all members of the laboratory.












27 March 2023
Prof. Ryu gave a keynote speech at an international conference, Optics-Lasser 2023,on optical communication and optical devices held in London, UK.

8 March 2023
Mr. Murakami , 2nd year master's degree student, Mr. Seitaibashi, a 1st year master's degree student, presented papers at IEICE National Convention.

2 March 2023
Graduate and undergraduate students completed graduation thesis. All the students in a lab got together and had a farewell party.













20 October 2022
Mr. Murakami , 2nd year master's degree student, Mr. Seitaibashi, a 1st year master's degree student, presented papers at IEICE Tehnical Committee Meeting.

6 September 2022
Mr. Seitaibashi, 1st year master's student, presented a paper at IEICE National Convention.

1 July 2022
A paper wiritten by Mr. Nagase, who completed his master's course in March 2022, was published in the journal of the Institute of Electronics, Information and Communication Engineers.

26 March 2022
The graduation ceremony, which had been canceled for two years due to the influence of the coronavirus, was held for the first time in three years, and two graduate master's students and ten undergraduate students set out for their respective career paths.














18 March 2022
Mr. Nagase, 2nd year master's degree students and Mr. Murakami, a 1st year master's student, presented papers at IEICE National Convention.

15 October 2021
Professor Ryu gave a tutorial invited lecture entitled "Coherent optical communication technology and my research life" at Technical Committee on Optical Fiber Technologies of IEICE.

17 September 2021
Mr. Nagase, a 2nd year master's degree student, presented a paper at IEICE National Convention.

11 September 2021
Ms. Takei, a 2nd year master's degree student, presented a paper at the 82nd JSAP Autumn Meeting 2021.

26 August 2021
Professor Ryu and Mr. Tsuboya, who completed the master's course in March of this year, presented a paper on continuous measurement technology of backscattered light at any point on the optical fiber at IEICE Tehnical Committee Meeting.

10 May 2021
Ms. Takei, a 2nd year master's student, presented a paper on optical fiber vibration detection technology at CLEO2021, the world's largest international conference on lasers and electro-optics.

17 March 2021
Ms. Takei, a 1st year master's degree student, presented a paper at the 68th JSAP Spring Meeting 2021.

9, 11 March 2021
Mr. Tsuboya, Mr. Tomaki, 2nd year master's degree students and Mr. Nagase, a 1st year master's student, presented papers at IEICE National Convention.

9 October 2020
Mr. Tsuboya and Ms. Nozawa, 2nd year master's degree students, Ms. Takei, a 1st year master's degree student, presented papers at IEICE Tehnical Committee Meeting.

15 September 2020
Mr. Tsuboya, a 2nd year master's degree student, presented a paper at IEICE National Convention.

8 September 2020
Ms. Takei, a 1st year master's degree student, presented a paper at the 81st JSAP Fall Meeting 2020.

5 August 2020
Ms. Takei, a 1st year master's degree student, presented a paper on high-speed measurement of optical fiber birefringence distribution at CLEO Pacific Rim 2020, an international conference on laser and electro-optics.

15 May 2020
Ms. Takei, a 1st year master's student, presented a paper on a new birefringence measurement technique for optical fibers at CLEO2020, the world's largest international conference on lasers and electro-optics.

9 March 2020
IEICE National Convention and the 67th JSAP Spring Meeting 2020 have been cancelled due to the concerncs about the new coronavirus outbreak. The list of the published papers of the meetings are now on the "Activities" pages.
IEICE National Convention: 2 papers
The 67th JSAP Spring Meeting 2020: 1 paper

5 November 2019
S. Ryu gave an invited talk at Interphotonics 2019, an international conference held in Antalya, Turkey.

28 October 2019
Fourth-year undregraduate students had a party at a restaurant at Nakano.
They are conducting their reserch works successfully for an iterium report poster session of guraduation thesis which will be held on 16 November.













11-13 September 2019
Three papers were presented at IEICE Society Convention held at Osaka University, Japan.

30 August 2019
IEICE Technical Committe Meeting was held at Kushiro, Hokkaido.
Two graduate students presented their papers.

10 July 2019
S. Ryu presented a paper about novel optical reflectometry method at OECC/PSC 2019 held at Fukuoka Convention Center.

26 March 2019
Seven fourth-year undergraduate students attended the graduation ceremony.












19-20 March 2019
Six papers were presented at IEICE General Convention held at Waseda University, Tokyo, Japan. Four undergraduate students and two graduate students presented their papers.

13 March 2019
Fourth-year undergraduate students completed graduation thesis. All the students in a lab got together and had a farewell party.












4 March 2019
A fourth-year undergraduate student presented a paper at OFC2019 (Optical Fiber and Communications Conference) which was held at San Diego, California, U.S.A.

21 December 2018
Year-end party (bonenkai) was held an Italian restaurant at Nakano.
The year`s accomplishments of our lab have been great including one invited talk at international conference, two international conference papers, and six domestic conference papers.












25 November 2018
The research theme of all third graders has been decided and personal page is added.

26-29 October 2018
Two graduate students presented papers at ACP2018 (Asia Communications and Photonics Conference) which was held at Hangzhou, China.

12 October 2018
S. Ryu presented an invited talk entitled "Application of angle diversity technique to optical wireless communication systems for smartphones" at Interphotonics 2018 which was held at Antalya, Turley.

11-13 September 2018
Six papers were presented at IEICE Society Convention held in Kanazawa, Japan. Three undergraduate students and three graduate students presented their papers.

7 and 8 September 2018
Fourth-year undergraduate students and graduate students visited Izu Shimoda area for a seminar lodging trip.


























21 and 22 August 2018
Demonstration on optical wireless communication (Li-Fi) was carried out at Nakano Open Campus.

20 July 2018
Third-year undergraduate students successfully finished the spring term seminar.
They joined at a Spanish&Mexican restaurant near Nakano station.
They have term examinations in the next week.













27 April 2018
Nine third-year undergraduate students have joined our Laboratory.
A welcome party was held at an Italian restaurant.













26 March 2018
Seven fourth-year undergraduate students attended the graduation ceremony.












2 March 2018
Fourth-year undergraduate students completed graduation thesis in time. All the students got together and had a farewell party for fourth-year undergraduate students.












20 December 2017
Year-end party (bonenkai) was held at a yakiniku restaurant. All the students gathered and had a great time.













10 December 2017
Profiles of third-year undergraduate students have been added.

13 October 2017
Third-year undergraduate students have finished learning fundamentals on optical fiber communications, and will start individual research from the next week.
They had a party with fourth-year undergraduate students who have already been engaged in their research works at Japanese izakaya restaurant.












13 September 2017
Two papers were preented at IEICE Society Convention.

22 and 23 August 2017
Demonstration on optical wireless communication was carried out at Nakano Open Campus.

18 June 2017
Information for applicants (master's and doctoral programs) has been added.

5 June 2017
Site has just opened.

12 April 2017
Seven undergraduate students (third-year) joined our lab.
Welcome party was held at Italian restaurant .

Ryu Laboratory
School of Interdisciplinary Mathematical Sciences
Meiji University

Room 1207, 1208
4-21-1, Nakano, Nakano-ku
Tokyo 164-8525, Japan
E-mail: ryulab#meiji.ac.jp
(replace # with @.)