CLEO 2022 Ayata Nakajima

2022-06-06 2022-09-29 Takuto ISHIOKA

Research

CLEO 2022 Participation Report

15th-20th May 2022, Convention Center, San Jose, USA

Ayata Nakajima, 2nd year master's student

About CLEO2022

This year's conference, an international conference on photonics, was held in a hybrid format of on-site and online. This was the first time in three years that the conference was held onsite, since it was held entirely online the year before last and last year. Although the effects of the new coronavirus infection (COVID-19) remained, and the need to confirm vaccination and wear masks was still present, the conference venue in San Jose was a great success, with many people from all over the world coming to attend sessions, some of which could not fit into the venue.

2. Presentation by the presenter

Title: Deterministic Generation of Perfect Soliton Crystal Assisted by Saturable
Absorption
Presenter: Ayata Nakashima
Affiliation: Keio University
Presentation No.: SW5H.4 (Wed, May 18th)

Soliton generation in micro optical resonators with carbon nanotubes is presented. The saturable absorption effect of carbon nanotubes enables deterministic generation of equally spaced soliton pulses. When I tried to display the presenter's view of the PowerPoint presentation, I had to present without the presenter's view due to a problem that the presenter's view was shared with other presenters. In last year's presentation, which was held online, I was able to check the questions in the chat box, but this year's presentation was face-to-face, so I struggled to understand English.

3. presentations attended

Title: Stability and Deterministic Generation of Single Solitons and Soliton Crystals
in Microresonators With Avoided Crossings
Presenter: Zhen Qi
Affiliation: University of Maryland Baltimore County
Presentation No.: JW3A.47 (Wed, May 18th)

This poster presentation is about numerical analysis using stability maps to determine the parameters necessary to generate N-period solitons. In particular, he said that the stability region of single solitons or soliton crystals is extended when mode crossing is considered in addition to the usual LugiatoLefever equation. The numerical analysis of soliton crystals is very close to my own research and was very informative.

Title: Dark-Bright Soliton Frequency Combs in a Microresonator
Presenter: Shuangyou Zhang
Affiliation: Max Planck Institute for the Science of Light
Presentation No.: SW4F.6 (Wed, May 18th)

In the session "Quantum Metrology for High Precision Measurement," there was a presentation on microcomputers, in which a dual wavelength pump was used to produce a pair of dark solitons generated by normal dispersion and bright solitons generated by anomalous dispersion. The presentation was about a pair of dark solitons generated by normal dispersion and bright solitons generated by anomalous dispersion by using a two-wavelength pump. Each soliton must orbit the resonator at the same speed, and the effects of mismatches were investigated in detail. The two combs were generated in the wavelength domain, and in the time domain, each soliton combined with the other, resulting in a state of nearly constant power, which was an interesting physical phenomenon.

Title: Inverse Spectral Design of Microcombs: Meta-Dispersion in PhotonicCrystal Ring Resonators
Presenter: Erwan Lucas
Affiliation: National Institute of Standards and Technology

Presentation No.: SW5H.1 (Wed, May 18th)

This research aims to generate a comb with a flat-top envelope in anticipation of applications such as wavelength division multiplexing communications. By solving the "inverse" Lugiato-Lefever equation, the dispersion profile required for an ideal-state comb is calculated. This is achieved by inducing mode splitting in a ring resonator with a multi-periodic wave-like structure inside. The ability to freely manipulate the spectrum of the comb will be very useful for further microcomputer applications.