PIERS 2023 Koya Tanigawa
Research
PIERS 2023 Participation Report
3th July - 6th July, Prague Congress Center, Prague ,Czech Republic
2nd year Master's degree Yukiya Tanigawa
1. participating conferences
Conference: PhotonIcs and Electromagnetics Research Symposium (Progress in
Electromagnetics Research Symposium) 2023
Dates: July 3, 2023 - July 6, 2023
Location: Prague congress center, Prague, Czech Republic
About PIERS2023
This is an international conference organized by The Electromagnetics Academy (TEMA), a non-profit organization founded by the late Professor Jin Au Kong of the Massachusetts Institute of Technology (MIT). This year's conference was held in Prague, Czech Republic. Many of the conference participants were Chinese, and there were also many Japanese. Many people gathered to attend the invited talk by Tobias J. Kippenberg of EPFL, who is well known as a world-class researcher, but he did not show up. The session in which I presented
The session on terahertz wave generation using microcomputers was organized by Dr. Tanabe, so we were able to attend the presentations by famous researchers from IMRA America, NICT, the University of Tokushima, and others in fields very close to SCOPE's research. Prague is famous for its beautiful old cityscape and for being the birthplace of "Pilsner," a type of beer. Therefore, I was able to spend a meaningful time drinking Pilsner and eating delicious food with researchers from other universities.
3. presentation by the presenter
Title: Generation of 300-GHz Terahertz Waves with Microresonator Frequency Combs
Presenter: Koya Tanigawa
Affiliation: Keio University
Presentation No.: 1A4 (Mon. 3rd July)
A silicon nitride ring resonator was used to generate a soliton microcomb with a repetition rate of 300 GHz, and an arrayed waveguide grating (AWG) and a single traveling carrier photodiode (UTCPD) were used to generate 300 GHz THz waves. During the Q&A session, I was asked what the phase noise would be compared to using another resonator, and I felt that this might indeed be worth checking.
4. presentations attended
Title: Versatile Cavity Solitons for Kerr Frequency Comb Generation
Presenter: Xiaoxiao Xue
Affiliation: Tsinghua University, China
Presentation No.: 1A4
In the dissipative Kerr solitons studied so far, group velocity dispersion has played a major role in soliton generation, but this presentation demonstrated that a new type of soliton can be generated by the interaction of Kerr nonlinearity and spectral filtering, even in the absence of dispersion. Increasing the order of the filtering can generate Nyquist pulse solitons, which have an unprecedentedly high spectral efficiency due to their flat and compact spectra. Therefore, a wide range of applications such as high-capacity communications, spectroscopy, and LiDAR ranging are expected.
Title: Low-phase-noise Frequency-tunable Microwave and Millimeter-wave Generation Using an Electro-optic-modulation Comb
Presenter: Atsushi Ishizawa
Affiliation: NTT Corporation, Japan
Nihon University, Japan
Presentation No.: 1A4
The presentation demonstrated wideband, low-noise, frequency-tunable millimeter-wave generation from 6 to 72 GHz by an electro-optic modulation comb (EO comb) using a lithium niobate and silicon modulator for high-precision time synchronization in a network. By using a mode-locked laser as a reference light and feeding back beats from the EO comb to the signal generator, the phase noise is much lower than that of commercial signal generators.
Title: Dual-Wavelength, Low-Phase-Nose, Optical Carrier for Terahertz-to-Optical Carrier Conversion with Electro-Optic Polymer Modulator
Presenter: Takeshi Yasui
Affiliation: Tokushima University, Japan
Presentation No.: 1P4a
The presentation was about terahertz detection by combining a two-wavelength optical carrier with an electro-optic polymer modulator, using a two-wavelength laser beam injection-locked to two modes of EO com as the carrier, and an electro-optic polymer modulator with terahertz as the external input voltage to produce a terahertz sideband on one carrier. The terahertz sidebands are produced on one of the carriers. When the frequency spacing of the carriers and the modulation frequency are slightly different, the RF beat signals of the unmodulated carrier and the modulated sideband are detected.
The terahertz-photon conversion was achieved by
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