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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| OCS, CS (Joint) |
2024-01-11 13:00 |
Kagoshima | Novel Architecture Expanding Accommodatable Signal-Types in Metro/Access-Integrated All-Photonics Network Shin Kaneko, Manabu Yoshino, Naotaka Shibata, Chihiro Kito, Daisuke Iida, Hiroshi Takahashi, Yoshifumi Wakisaka, Yusuke Koshikiya, Junichi Kani, Tomoaki Yoshida (NTT)  CS2023-93 |
We propose an architectural extension for metro/access integrated all-photonics network (APN) that supports close networ... [more] | CS2023-93 pp.1-5 |
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| 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 |
| OFT | 2023-10-12 10:10 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Simplified temperature sensing probe based on BOCDR Kanon Toda (YNU), Hiroshi Takahashi (YNU/NTT), Yusuke Koshikiya (NTT), Yosuke Mizuno (YNU) OFT2023-20 |
Optical fiber sensors have been extensively studied owing to their advantages such as immunity to electromagnetic noise,... [more] | OFT2023-20 pp.19-22 |
| OFT | 2023-10-12 13:00 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Proposal of low-coherence BOCDR based on periodic noise modulation Kenta Otsubo, Takaki Kiyozumi (YNU), Hiroshi Takahashi (YNU/NTT), Yusuke Koshikiya (NTT), Yosuke Mizuno (YNU) OFT2023-30 |
As a principle of distributed measurement of strain and temperature along an optical fiber, the strain/temperature depen... [more] | OFT2023-30 pp.59-62 |
| OFT | 2023-10-13 13:35 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Primary: On-site, Secondary: Online) |
[Invited Talk]
Performance Improvement of Phase-OTDR Distributed Acoustic Sensing based on Frequency Division Multiplexing for Optical Fiber Environmental Monitoring Yoshifumi Wakisaka, Hiroshi Takahashi, Daisuke Iida, Takahiro Ishimaru, Yusuke Koshikiya (NTT) OFT2023-43 |
[more] | OFT2023-43 pp.107-110 |
| OFT | 2023-10-13 14:20 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Primary: On-site, Secondary: Online) |
Consideration of measurement ability improvement about broadband light probe BOTDA. Takahiro Ishimaru, Yoshifumi Wakisaka, Hiroshi Takahashi, Yusuke Koshikiya (NTT) OFT2023-44 |
In recent years, optical fiber distributed vibration measurement based on Brillouin scattering, which can measure large ... [more] | OFT2023-44 pp.111-114 |
| OFT, OCS, LSJ (Joint) [detail] |
2023-08-25 10:55 |
Hokkaido | (Primary: On-site, Secondary: Online) |
Ultrafast Measurement of Spatial Modes employing Two-dimensional Linear Optical Sampling Shuki Okamura, Kyogo Osawa, Chao Zhang, Fumihiko Ito (Shimane Univ.), Atsushi Nakamura, Yusuke Koshikiya (NTT) OFT2023-14 |
With the combination of linear optical sampling a low-speed photodiode array, we measured the two-dimensional complex am... [more] | OFT2023-14 pp.27-31 |
| OFT | 2022-10-13 10:50 |
Kanagawa | Kanagawa-Kenmin Center (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Bandwidth-by-band Measurement of Spatial-Mode Dispersion of Coupled 2-Core and 4-Core Fibers employing Linear Optical Sampling Shuki Okamura, Masafumi Uyama, Chao Zhang, Fumihiko Ito (Shimane Univ.), Atsushi Nakamura, Tatsuya Okamoto, Yusuke Koshikiya (NTT) OFT2022-30 |
The impulse responses of coupled 2-core and 4-core fibers with various fiber lengths were measured over a wide bandwidth... [more] | OFT2022-30 pp.47-52 |
| OFT | 2022-05-13 14:00 |
Aomori | Aomori-Aspm Bldg (Primary: On-site, Secondary: Online) |
Measurement of Spatial-Mode Dispersion of Coupled 2-Core Fiber employing Linear Optical Sampling Masafumi Uyama, Shuki Okamura, Chao Zhang, Fumihiko Ito (Shimane Univ.), Atsushi Nakamura, Tatsuya Okamoto, Yusuke Koshikiya (NTT) OFT2022-3 |
The spatial mode dispersion of two types of coupled multicore fibers, one with a homogeneous core and the other with a h... [more] | OFT2022-3 pp.11-15 |
| OPE, OFT, OCS (Joint) [detail] |
2022-02-25 10:50 |
Online | Online | Crosstalk test method for constructing uncoupled multi-core fiber transmission line Tomokazu Oda, Atsushi Nakamura, Yusuke Koshikiya (NTT) OFT2021-78 OPE2021-61 |
Total end-to-end inter-core crosstalk (XT) is a key requirement for transmission systems using uncoupled multi-core fibe... [more] | OFT2021-78 OPE2021-61 pp.43-48(OFT), pp.64-69(OPE) |
| OPE, OCS, OFT (Joint) [detail] |
2021-02-19 13:55 |
Online | Online | Application of distributed vibration sensing based on frequency-division-multiplex phase OTDR to monitoring an installed aerial optical fiber cable state Yoshifumi Wakisaka, Daisuke Iida, Tatsuya Okamoto, Yusuke Koshikiya, Nazuki Honda (NTT) OFT2020-69 OPE2020-90 |
Researches on distributed vibration sensing (DVS) to closely visualize optical fiber cable states have been developed fo... [more] | OFT2020-69 OPE2020-90 pp.62-65(OFT), pp.67-70(OPE) |
| OPE, OCS, OFT (Joint) [detail] |
2021-02-19 14:45 |
Online | Online | Applicability of variable apparture technique for measuring mode field diameter of multi-core fibers Atsushi Nakamura (NTT), Ohashi Masaharu (OPU), Yusuke Koshikiya (NTT) OFT2020-71 OPE2020-92 |
Mode field diameter (MFD) is an important parameter for estimating transmission characteristics of optical fibers. A var... [more] | OFT2020-71 OPE2020-92 pp.72-75(OFT), pp.77-80(OPE) |
| OFT | 2021-01-15 14:35 |
Online | Online | Estimating loss and crosstalk at splice point in two-mode fiber using Brillouin optical time domain reflectometry Tomokazu Oda, Atsushi Nakamura, Yusuke Koshikiya, Nazuki Honda (NTT) OFT2020-52 |
[more] | OFT2020-52 pp.38-42 |
| OFT, OCS, IEE-CMN, ITE-BCT [detail] | 2017-11-24 09:55 |
Osaka | Kansa-Univ. Umeda Campus | Reduction of modal birefringent fluctuation in 1-µm-band mode-detection optical time domain reflectometry Atsushi Nakamura, Yusuke Koshikiya, Tetsuya Manabe (NTT) OFT2017-49 |
We have proposed an optical time domain reflectometry (OTDR) that conducts measurements in the two-mode region of widely... [more] | OFT2017-49 pp.29-32 |
| OCS, OFT, LSJ (Joint) [detail] |
2016-08-26 09:55 |
Hokkaido | Chitose-alcadia plaza | Mode field diameter of LP11 mode for estimating coupling efficiencies at a splice and its measurement technique Atsushi Nakamura, Keiji Okamoto, Yusuke Koshikiya, Tetsuya Manabe (NTT) OFT2016-12 |
In mode division multiplexing transmission using few-mode fibers (FMFs), the losses and mode crosstalk that occur at spl... [more] | OFT2016-12 pp.5-10 |
| OCS, OFT, LSJ (Joint) [detail] |
2016-08-26 12:15 |
Hokkaido | Chitose-alcadia plaza | Study of Branching Ratio of Optical Coupler for Cable Re-routing Operation Support System with No Service Interruption Hiroshi Watanabe, Kazutaka Noto, Yusuke Koshikiya, Tetsuya Manabe (NTT) OFT2016-14 |
The optical access network is becoming increasingly important as a social infrastructure because it is used for several ... [more] | OFT2016-14 pp.15-20 |
| OFT | 2015-12-11 14:25 |
Tokyo | The University of Electro-Communications (Tokyo) | Identification of loss factors using 1-um-band mode-detection OTDR Atsushi Nakamura, Keiji Okamoto, Yusuke Koshikiya, Tetsuya Manabe, Manabu Oguma, Toshikazu Hashimoto, Mikitaka Itoh (NTT) OFT2015-48 |
Optical fiber cables exposed to long-term severe environmental conditions can cause loss increases due to deterioration.... [more] | OFT2015-48 pp.13-16 |
| OFT | 2015-10-22 16:40 |
Mie | Mie Univ. | Maintenance work supporting system using augmented reality technology for transmission equipment in central offices Yusuke Koshikiya, Yoshitaka Enomoto, Ikutaro Ogushi, Tetsuya Manabe (NTT) OFT2015-32 |
We present a maintenance work supporting system using an augmented reality (AR) technology for transmission equipment in... [more] | OFT2015-32 pp.29-34 |
| OCS, OFT (Joint) |
2014-08-29 10:25 |
Hokkaido | Kushiro Royal Inn | Highly sensitive detection of fiber bending using 1-μm-band mode detection OTDR Atsushi Nakamura, Keiji Okamoto, Yusuke Koshikiya, Nobutomo Hanzawa, Kazunori Katayama, Tetsuya Manabe (NTT) OFT2014-18 |
Fiber bending can cause troubles in the optical networks due to a fiber loss increase. The potential fault location such... [more] | OFT2014-18 pp.13-16 |
| OPE, OFT | 2012-03-02 10:55 |
Tokyo | Individual Distribution Measurement in PON Using Pulsed-Pump-Probe Brillouin Gain Analysis Hiroshi Takahashi, Xinyu Fan, Yusuke Koshikiya, Fumihiko Ito (NTT) OFT2011-76 OPE2011-202 |
A fault location technique for PONs is essential for improving the service reliability of optical fiber networks. OTDR i... [more] | OFT2011-76 OPE2011-202 pp.19-22 |
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