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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 102  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
PN 2024-03-15
16:10
Kagoshima
(Primary: On-site, Secondary: Online)
A Study of Coherent Downstream Transmission of Adaptive Polarization and IQ Multiplexed Signals with Asymmetric Number of Signal Points and Amplitude
Yuika Mori, Keiji Shimada, Takahiro Kodama (Kagawa Univ.)
(To be available after the conference date) [more]
UWT
(2nd)
2024-01-29
16:40
Tokyo Tokai University Shinagawa Campus
(Primary: On-site, Secondary: Online)
Estimation of the modulation method ratio for time-domain hybrid PAM signals using machine learning
Ayumu Kariya, Fumiya Kobori, Keita Tanaka, Takahiro Kodama (Kagawa Univ.)
We propose a transmission capacity estimation method for time-domain hybrid PAM schemes with variable transmission capac... [more]
OCS, OFT, IEE-CMN, ITE-BCT
(Joint) [detail]
2023-11-10
10:35
Kyoto
(Primary: On-site, Secondary: Online)
High-accuracy distributed strain sensing based on low-coherence BOCDR: simulation and experimental validation
Kenta Otsubo, Guangtao Zhu, Takaki Kiyozumi (YNU), Hiroshi Takahashi (YNU/NTT), Yusuke Koshikiya (NTT), Yosuke Mizuno (YNU) OFT2023-52
As a principle of distributed measurement of strain and temperature along an optical fiber, the strain/temperature depen... [more] OFT2023-52
pp.24-29
RISING
(3rd)
2023-10-31
14:00
Hokkaido Kaderu 2・7 (Sapporo) [Poster Presentation] Digital Signal Processing Based on Neural Networks -- The Key Technology for Realizing High-capacity Optical Fiber Communication Systems --
Takuro Ochiai, Reiji Higuchi, Takuma Kuno (Nagoya Univ.), Ryuta Shiraki (Kyoto Univ.), Yojiro Mori, Hiroshi Hasegawa (Nagoya Univ.)
To fulfil the ever-increasing traffic demands, the introduction of quadrature amplitude modulation and coherent detectio... [more]
OCS, LQE, OPE 2023-10-19
15:15
Kochi
(Primary: On-site, Secondary: Online)
Impact of Reflections at MMI Combiner in Mach-Zehnder Silicon Optical Modulators: Towards Extrinsic OMA Enhancement
Tadashi Murao (Mitsubishi Electric), Tsuyoshi Horikawa (Tokyo Tech.) OCS2023-34 OPE2023-89 LQE2023-36
The realization of high dynamic extinction ratio (ER) and optical modulation amplitude (OMA) while keeping the optical a... [more] OCS2023-34 OPE2023-89 LQE2023-36
pp.37-40
OFT 2023-10-12
10:10
Tokyo Kikai-Shinko-Kaikan Bldg.
(Primary: On-site, Secondary: Online)
[Poster Presentation] Estimating spatial resolution in BOCDR using Rayleigh scattering
Keita Kikuchi, Ryo Inoue (SIT), Kouta Ozaki (YNU), Haruki Sasage (SIT), Yosuke Mizuno (YNU), Heeyoung Lee (SIT) OFT2023-21
To determine the spatial resolution of Brillouin optical correlation-domain reflectometry (BOCDR), the measurement of mo... [more] OFT2023-21
pp.23-26
PN 2023-08-29
10:05
Hokkaido
(Primary: On-site, Secondary: Online)
Optical fiber long-distance multi-repeater transmission experiment of phase-shifted symbol-preserving encrypted polarization-multiplexed QAM signals
Reika Suketomo, Yuika Mori, Hodaka Amano, Keiji Shimada (Kagawa Univ.), Ryosuke Matsumoto (AIST), Takahiro Kodama (Kagawa Univ.) PN2023-16
We have demonstrated that phase-shifted symbol-preserving encryption does not cause excessive degradation in 7 ch WDM 32... [more] PN2023-16
pp.1-5
PN 2023-03-02
13:20
Okinawa
(Primary: On-site, Secondary: Online)
Study of Duobinary-coded Time Domain Hybrid PAM System
Fumiya Kobori, Keita Tanaka, Ayumu Kariya, Takahiro Kodama (Kagawa Univ.) PN2022-61
We study a time-domain hybrid pulse-amplitude modulation scheme, a mixture of two pulse-amplitude modulation schemes for... [more] PN2022-61
pp.101-105
OCS, OFT, OPE
(Joint) [detail]
2023-02-17
11:05
Okinawa kukuru-itomancity
(Primary: On-site, Secondary: Online)
Designing Operation Parameters Using Deep Unfolding for MIMO Adaptive Equalization in Optical Coherent Transmission Systems
Eidai Sunamoto, Koji Igarashi (Osaka Univ.) OCS2022-81 OPE2022-110
In the coherent optical transmission systems, adaptive control is required to suppress and compensate for laser phase no... [more] OCS2022-81 OPE2022-110
pp.56-61(OCS), pp.81-86(OPE)
MWPTHz, PN, EMT, IEE-EMT [detail] 2023-01-24
10:05
Osaka
(Primary: On-site, Secondary: Online)
Digital Coherent Receiver with Quantization Noise Mitigation Function
Takuro Ochiai, Ryuta Shiraki, Yojiro Mori, Hiroshi Hasegawa (Nagoya Univ.) PN2022-37 EMT2022-75 MWPTHz2022-63
To fulfil the ever-increasing traffic demands, the introduction of quadrature amplitude modulation (QAM) / coherent dete... [more] PN2022-37 EMT2022-75 MWPTHz2022-63
pp.35-38
OCS, CS
(Joint)
2023-01-13
15:10
Fukuoka CANAL CITY HAKATA
(Primary: On-site, Secondary: Online)
An eavesdropping model for constellation-preserving simple symbol encryption and its evaluation
Keiji Shimada, Takahiro Kodama (Kagawa Univ.) OCS2022-67
We have proposed constellation-preserving simple symbol encryption that keeps the arrangement of symbol points containin... [more] OCS2022-67
pp.39-44
ITE-BCT, OCS, IEE-CMN, OFT 2022-11-11
14:15
Miyagi Forest-Sendai
(Primary: On-site, Secondary: Online)
Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method
Tsubasa Fujiwara, Koji Igarashi (Osaka Univ), Fumihiko Ito (Shimane Univ) OCS2022-47
In coherent transmission systems, we require simple constellation monitoring of quadrature amplitude modulation (QAM) op... [more] OCS2022-47
pp.41-45
PN 2022-11-07
16:45
Kochi
(Primary: On-site, Secondary: Online)
[Invited Talk] Underwater Visible Light Wireless Communications
Takahiro Kodama (Kagawa Univ.) PN2022-27
In this paper, we describe the technology that our organization is working on for underwater optical wireless in shallow... [more] PN2022-27
pp.32-38
OPE, OCS, LQE 2022-10-20
15:45
Ehime
(Primary: On-site, Secondary: Online)
Theoretical and Experimental Investigation of Frequency Chirp Induced by Inter-Arm Imbalance in Mach-Zehnder Silicon Optical Modulators
Tadashi Murao, Jun Ushida, Hiroyuki Takahashi, Masatoshi Tokushima, Akemi Shiina, Tsuyoshi Horikawa (PETRA) OCS2022-22 OPE2022-68 LQE2022-31
Characteristic variations caused by nonuniformities in the fabrication process are inevitable in carrier-depletion Mach–... [more] OCS2022-22 OPE2022-68 LQE2022-31
pp.28-33
OFT 2022-10-13
10:50
Kanagawa Kanagawa-Kenmin Center
(Primary: On-site, Secondary: Online)
[Poster Presentation] Noise reduction technique for amplitude-modulated optical soliton transmission considering wavelength dispersion of optical fiber
Kazuki Sakamoto, Hirokazu Kubota, Yuji Miyoshi (Osaka Metropolitan Univ.) OFT2022-28
Research and development related to Beyond 5G, the next generation of fifth-generation mobile communication systems (5G)... [more] OFT2022-28
pp.39-42
MWPTHz, EST, MW, EMT, OPE, IEE-EMT [detail] 2022-07-19
15:45
Hokkaido Asahikawa Civic Culture Hall
(Primary: On-site, Secondary: Online)
Fundamental Characteristic Measurements of Electroabsorption Modulator Integrated Laser Diode for Vector Modulation
Yuki Seto (Waseda Univ.), Keizo Ingaki (NICT), Tetsuya Kawanishi (Waseda Univ.) EMT2022-28 MW2022-52 OPE2022-31 EST2022-29 MWPTHz2022-26
We measured the fundamental characteristics of an EA modulator integrated laser diode for vector modulation of light. Di... [more] EMT2022-28 MW2022-52 OPE2022-31 EST2022-29 MWPTHz2022-26
pp.99-102
OCS, PN, NS
(Joint)
2022-06-10
13:25
Online Online Decoding Complexity Reduction of Forward Error Correction by Channel-polarized Multilevel Coding
Takeshi Kakizaki, Masanori Nakamura, Fukutaro Hamaoka, Yoshiaki Kisaka (NTT) OCS2022-11
In a digital coherent optical communication system, it is necessary to design a forward error correction (FEC) and modul... [more] OCS2022-11
pp.6-11
PN 2022-03-02
09:50
Online Online Initial study of pseudo-phase noise-based symbol masked polarization-multiplexed M-QAM signal using a time-spreading encryption key
Keiji Shimada, Mizuki Inagaki, Takahiro Kodama (Kagawa Univ.) PN2021-70
In recent years, a common key cryptosystem for the physical layer has been introduced in digital signals to keep the dat... [more] PN2021-70
pp.92-97
PN 2022-03-02
15:55
Online Online Application of polarization-independent subtractive interference cancellation algorithm for same-band and bidirectional coherent communication
Mizuki Inagaki, Takahiro Kodama (Kagawa Univ.) PN2021-84
When a single core and the same band bidirectional transmission is performed in a passive optical network (PON) for mobi... [more] PN2021-84
pp.169-173
PN 2022-03-02
16:35
Online Online Evaluation of the optimum modulation arrangement in a time frame for TDHP signal with same generation ratio of PAM2/PAM4
Fumiya Kobori, Keita Tanaka, Takahiro Kodama (Kagawa Univ.) PN2021-86
For underwater optical wireless communication system using the visible light wavelength band single-carrier-method, whic... [more] PN2021-86
pp.180-184
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