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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| OCS, CS (Joint) |
2024-01-12 09:55 |
Kagoshima | Fully coherent optical and wireless transmission in the 28 GHz band by using an injection-locked carrier frequency converter Koichi Shirahata, Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.), Uichiro Azuma, Toshiyuki Kobayashi (Nihon Dengyo Kosaku)  OCS2023-63 |
As an optical mobile fronthaul with low latency and low power consumption, we have proposed a fully coherent optical and... [more] | OCS2023-63 pp.31-36 |
|
| AP | 2023-02-17 14:55 |
Miyagi | Tohoku University, Aobayama Campus (Primary: On-site, Secondary: Online) |
Coherently-linked optical and wireless transmission by using a 28 GHz band microstrip antenna Keisuke Kasai, Taisei Sato, Koichi Shirahata, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ), Uichiro Azuma, Toshiyuki Kobayashi (Dengyo) AP2022-229 |
As an economical, large-capacity mobile fronthaul, we have proposed coherently-linked optical and wireless transmission ... [more] | AP2022-229 pp.178-183 |
| ED, MWPTHz | 2022-12-19 17:10 |
Miyagi | ED2022-78 MWPTHz2022-49 |
We experimentally investigate the effect of high-intensity subcarrier signal input to the UTC-PD-integrated HEMT working... [more] | ED2022-78 MWPTHz2022-49 pp.34-37 |
|
| NS, IN, CS, NV (Joint) |
2022-09-02 10:05 |
Iwate | MALIOS (Iwate Prefecture) + Online Meeting (Primary: On-site, Secondary: Online) |
Proposal of Wi-Fi infrastructure by independent information sharing system in medical institutions (iSM) Matt Yoshida IN2022-34 |
[more] | IN2022-34 pp.39-40 |
| OCS, CS (Joint) |
2022-01-13 15:55 |
Yamaguchi | Conference room 204A・B at KDDI Ishin-hall (Primary: On-site, Secondary: Online) |
Performance comparison of injection-locked carrier frequency conversion and self-heterodyne detection methods in coherently-linked optical and wireless transmission Taisei Sato, Koichi Shirahata, Keisuke Kasai, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa (Tohoku Univ.) OCS2021-34 |
We have demonstrated a coherently-linked 64 Gbit/s, 256 QAM transmission in the 61 GHz IF band over a 10 km single-mode ... [more] | OCS2021-34 pp.7-10 |
| ED, THz | 2021-12-20 13:00 |
Miyagi | (Primary: On-site, Secondary: Online) |
[Invited Talk]
Recent Progress in Carrier Down-Conversion Devices Between Optical Communication and Beyond 5G Wireless Communication Akira Satou, Dai Nakajima, Kazuki Nishimura, Tomotaka Hosotani, Katsumi Iwatsuki, Tetsuya Suemitsu, Keisuke Kasai, Masato Yoshida, Taiichi Otsuji (Tohoku Univ.) ED2021-48 |
echnologies that seamlessly converges optical networks and wireless networks with small delay and low power consumption ... [more] | ED2021-48 pp.1-5 |
| OFT | 2021-05-14 13:45 |
Online | Online | BER performance improvement of ultrahigh-speed coherent Nyquist pulse transmission using low-nonlinearity, dispersion-compensated transmission line with chirped FBG and LCoS Kosuke Kimura, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2021-7 |
We demonstrate a low-nonlinearity, dispersion-compensated transmission line composed of a chirped FBG and an LCoS device... [more] | OFT2021-7 pp.27-30 |
| PN | 2021-03-01 15:35 |
Online | Online | [Invited Talk]
R&D on high-capacity multi-core fiber transmission systems Itsuro Morita, Daiki Soma, Takehiro Tsuritani (KDDI Research), Masato Yoshida, Hiroshi Yasaka (Tohoku Univ), Takemi Hasegawa, Tetsuya Hayashi (Sumitomo Electric), Shigehiro Takasaka, Koichi Maeda, Ryuichi Sugizaki (Furukawa Electric), Takanori Inoue, Hitoshi Takeshita (NEC), Taketoshi Takahata, Tetsuya Kobayashi (OPTOQUEST) PN2020-46 |
The capacity of optical submarine cable systems has been drastically increased by introducing various innovative technol... [more] | PN2020-46 pp.26-29 |
| SR | 2021-01-25 11:00 |
Online | Online | [Invited Talk]
Toward optical and wireless integrated full-coherent access network Toshihiko Hirooka, Keisuke Kasai, Masato Yoshida, Masataka Nakazawa (Tohoku Univ.) SR2020-49 |
We have proposed a coherently-linked optical and wireless transmission system toward a large-capacity radio access netwo... [more] | SR2020-49 pp.15-20 |
| OCS, CS (Joint) |
2021-01-14 14:55 |
Online | Online | Study on chromatic dispersion dependence of GAWBS noise Kozo Sato, Takashi Kan, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OCS2020-30 |
We have proposed the guided acoustic-wave Brillouin scattering (GAWBS) phase noise compensation method with a pilot tone... [more] | OCS2020-30 pp.18-23 |
| OCS, CS (Joint) |
2021-01-15 14:25 |
Online | Online | 12.8 Tbit/s (1.28 Tbit/s/ch x 10) OTDM-WDM Transmission of PDM-DQPSK Optical Nyquist Pulses over 1500 km Aoi Watanabe, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa (Tohoku Univ.) OCS2020-37 |
Motivated by the rapid increase in global data traffic, ultrahigh-speed transmission with a single-channel bit rate exce... [more] | OCS2020-37 pp.50-54 |
| OCS, OFT, LSJ (Joint) [detail] |
2020-08-28 15:15 |
Online | Online | Experimental and theoretical analyses of GAWBS phase noise in multi-core fiber for digital coherent transmission Masato Yoshida, Naoya Takefushi, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OCS2020-7 |
(Advance abstract in Japanese is available) [more] | OCS2020-7 pp.15-20 |
| CS, OCS (Joint) |
2020-01-16 14:45 |
Oita | Beppu Housensou Hotel (Oita Pref.) | [Invited Lecture]
Next Generation C-RAN Mobile Fronthaul Using On-line Bi-directional 256 QAM WDM Coherent Transmission Takashi Kan, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa (Tohoku Univ.) OCS2019-73 |
We have recently proposed a simple digital coherent transmission system with an injection locking technique for next gen... [more] | OCS2019-73 pp.47-52 |
| OCS, PN, NS (Joint) |
2019-06-20 10:35 |
Iwate | MALIOS（Morioka） | Sub-Picosecond Optical Switch over Entire C-Band by Using Nonlinear Optical Loop Mirror Ryoya Hirata, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa (Tohoku Univ.) OCS2019-10 |
Ultrafast optical switches have many useful applications ranging from ultrahigh-speed optical communication to signal pr... [more] | OCS2019-10 pp.1-4 |
| OCS, PN, NS (Joint) |
2019-06-20 11:00 |
Iwate | MALIOS（Morioka） | GAWBS noise characteristics in digital coherent transmission in various optical fibers Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OCS2019-11 |
(Advance abstract in Japanese is available) [more] | OCS2019-11 pp.5-10 |
| OCS, PN, NS (Joint) |
2019-06-21 16:00 |
Iwate | MALIOS（Morioka） | 50.4 Tbit/s, L-band 480 ch-WDM, 128 QAM-160 km digital coherent optical transmission using an injection-locked homodyne receiver Takashi Kan, Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OCS2019-19 |
Injection locking method enables us to realize precise optical carrier-phase synchronization between transmitted data an... [more] | OCS2019-19 pp.47-50 |
| OCS, CS (Joint) |
2019-01-17 17:15 |
Okinawa | Nobumoto Ohama Memorial Hall (Ishigaki Island) | [Invited Lecture]
160 Gbit/s, 256 QAM bidirectional coherent transmission for next generation mobile fronthaul Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa (Tohoku Univ.) CS2018-95 OCS2018-75 |
We have recently proposed a simple digital coherent transmission system with an injection locking technique for a next g... [more] | CS2018-95 OCS2018-75 pp.47-52(CS), pp.41-46(OCS) |
| OCS, CS (Joint) |
2019-01-17 17:40 |
Okinawa | Nobumoto Ohama Memorial Hall (Ishigaki Island) | [Invited Lecture]
Dual-polarization real-time 256～512 QAM digital coherent transmission Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) CS2018-96 OCS2018-76 |
(Advance abstract in Japanese is available) [more] | CS2018-96 OCS2018-76 pp.53-58(CS), pp.47-52(OCS) |
| OFT | 2018-10-11 14:00 |
Miyagi | Touhoku Univ. | [Poster Presentation]
Single-channel 10.2 Tbit/s Optical Nyquist Pulse Transmission over 300 km Ryoya Hirata, Jianping Wang, Toshihiko Hirooka, Masato Yoshida, Masataka Nakazawa (Tohoku Univ.) OFT2018-26 |
We have proposed an optical Nyquist pulse and its orthogonal TDM scheme for high-speed and high spectrally efficient tra... [more] | OFT2018-26 pp.61-66 |
| OFT | 2018-10-11 14:00 |
Miyagi | Touhoku Univ. | [Poster Presentation]
Single-channel 7.68 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 9.7 bit/s/Hz Kosuke Kimura, Nitta Junpei, Masato Yoshida, Keisuke Kasai, Toshiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2018-27 |
We achieved a record capacity of 7.68 Tbit/s in a single channel coherent Nyquist pulse transmission over 150 km with a ... [more] | OFT2018-27 pp.67-71 |
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