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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 37  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
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
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
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] 12 bit/s/Hz, 58.2 Tbit/s, 256 QAM-160 km C-band WDM Transmission Using an Injection Locking Technique
Takashi Kan, Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2018-28
Injection locking can realize precise carrier-phase synchronization between the transmitted data and a local oscillator ... [more] OFT2018-28
pp.73-77
OFT 2018-10-11
14:00
Miyagi Touhoku Univ. [Poster Presentation] Observation of GAWBS noise and development of its compensation technique in digital coherent optical transmission
Naoya Takefushi, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2018-29
Guided acoustic-wave Brillouin scattering (GAWBS) noise is an optical phase fluctuation that occurs coherently with ther... [more] OFT2018-29
pp.79-83
CS, OCS
(Joint)
2018-01-29
15:45
Ehime Ehime University 80 Gbit/s, 256 QAM digital coherent optical transmission with injection-locking for next generation mobile fronthaul
Keisuke Kasai, Yixing Wang, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa (Tohoku Univ.) OCS2017-70
We propose a simple digital coherent transmission system with injection-locking for the next generation (5G and post 5G)... [more] OCS2017-70
pp.19-24
OFT, OCS, IEE-CMN, ITE-BCT [detail] 2016-11-11
09:30
Nagasaki Nagasaki Shoko Kaigi Sho Fabrication of a multi-core fiber by using a slurry casting method
Jun Yamamoto, Tamotsu Yajima, Yusuke Kinoshita, Futoshi Ishii (Kohokoku Kogyo), Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OFT2016-30
We fabricated a 7 core multi-core fiber (MCF) using a slurry casting method with a highly pure SiO2 powder as a starting... [more] OFT2016-30
pp.29-33
OCS 2015-07-30
10:00
Tokyo Tokyo Tech Front 1.92 Tbit/s/ch, 64 QAM coherent Nyquist orthogonal TDM transmission with a spectral efficiency of 10.6 bit/s/Hz
David Odeke Otuya, Koudai Harako, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (Tohoku Univ.) OCS2015-26
(Advance abstract in Japanese is available) [more] OCS2015-26
pp.7-12
QIT
(2nd)
2014-11-18
13:30
Miyagi Tohoku Univ. QAM quantum stream cipher using digital coherent optical transmission
Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai (Tohoku Univ.)
 [more]
OCS, OPE, LQE 2014-10-30
14:05
Nagasaki Nagasaki Museum of History and Culture High-performance TDM demultiplexing of coherent Nyquist pulses using time-domain orthogonality
Koudai Harako, David Odeke Otuya, Keisuke Kasai, Toshihiko Hirooka, Masataka Nakazawa (TohokuUniv.) OCS2014-60 OPE2014-104 LQE2014-78
We propose a simple and high-performance scheme for demultiplexing coherent Nyquist TDM signals by photo-mixing on a pho... [more] OCS2014-60 OPE2014-104 LQE2014-78
pp.97-100
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