CLEO 2020 Tamitaka Otsuka

2020-01-16 2022-09-24 miyahara

Research

CLEO 2020 Participation Report

11-15 May 2020, Online

Tamitaka Otsuka, 2nd year master's student

About CLEO2020

This year's CLEO was held from May 11 - 15. CLEO is an international conference on Optics and Photonics and is the largest conference in our industry. Although CLEO has been held in San Jose, USA every year, this year it was held online due to the new coronavirus infection (COVID-19). As this was the first time for me to participate in an online conference, I was very confused because I was not familiar with the flow of the conference proceedings, preparations, and so on. Although some participants declined to make CLEO presentations, I feel that many presentations were made. As for the presentation format, there were few live presentations, and most of the presentations were made by sharing the video recorded in advance. I think there is no difference in the contents of the presentations, but I felt that the live presentations were better than the video presentations. There were several hundred attendees per session, probably because of the convenience of online participation.

2. Presentation by the presenter

Title : Generation of Kerr frequency comb aligned with ITU-T DWDM grid for telecom applications
Presenter : Tamiki Ohtsuka
Affiliation : Keio University
Announcement No. : JTU2C.7 (Wed 12, May)

We presented a study on optical communication applications using SiN micro optical resonators. We reported the generation of microcomb and the measurement results of linewidths adapted to the ITU-T grid, which is a standard for WDM optical communications. This was a poster style presentation that made effective use of video and images using a display, but since it was held online, the presentation was given in the same format as the oral presentation. The questions were not about the generated microcombs but about the micro optical resonators themselves. I was quite nervous about the presentation, so I would like to prepare well for the next presentation so that I can relax and not be overly nervous.

3. presentations attended

Title : Generation of a dissipative Kerr-microresonator soliton comb pumped by a MHz linewidth DFB laser
Presenter : Kenji Nishimoto
Affiliation : Tokushima University, Kuse Group
Presentation No. : SW3J.3 (Wed 13, May)

The solitons were generated by using a DFB laser with linewidths in the order of MHz. The noise of solitons generated by narrow linewidth lasers below 10 kHz is compared with that by MHz-order DFB lasers. As a result, the phase noise did not deteriorate significantly in the case of the DFB laser. Since soliton generation is possible only by changing the current to the DFB laser, it may be a great advantage in future applications.

Title :Dynamics of Soliton Microcomb Self-Injection Locking in Silicon Nitride Microresonator
Presenter : Andrey Voloshin
Affiliations : RQC & EPFL, Bilenko & Kippenberg
Presentation No. : SW3J.4 (Wed 13, May)

A soliton microcomputer using a semiconductor laser with self-injection locking (SIL) has been demonstrated. Since the SIL soliton dynamics has not been studied in detail, it is clarified using theory and experimental data. Selfinjection locking with Kerr nonlinearity is considered, and a theoretical model is reported. The validity of the theoretical model is also reported by comparing it with experimental data. The integration of semiconductor lasers and SiN is feasible and shows great potential for future industrial packages.