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Committee Date Time Place Paper Title / Authors Abstract Paper #
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
OFT 2012-01-19
14:20
Kagawa   [Invited Talk] International Standardization Trend on Optical Fiber and Related Technologies
Kazuhide Nakajima, Noriyuki Araki, Yusuke Koshikiya (NTT) OFT2011-57
This paper reviews recent international standardization work under ITU-T responsibility with respect to an optical fiber... [more] OFT2011-57
pp.11-14
OFT 2012-01-20
11:20
Kagawa   Compact and Large Capacity Optical Identification Device for Optical Fiber Line Management
Yusuke Koshikiya, Noriyuki Araki, Chihiro Kito, Fumihiko Ito (NTT) OFT2011-70
 [more] OFT2011-70
pp.67-70
OCS, OFT, ITE-BCT, IEE-CMN
(Joint) [detail]
2011-11-17
15:00
Shimane Shimane Univ. Coherence characterization of narrow-linewidth beam by speckle statistical analysis
Masaaki Inoue, Yusuke Koshikiya, Xinyu Fan, Fumihiko Ito (NTT) OFT2011-47
A novel method for characterizing the amplitude of a coherence function with respect to a delay between two optical wave... [more] OFT2011-47
pp.1-4
OFT 2011-10-20
16:25
Nagano   Measurement of Long-haul Optical Amplifier Submarine Cable System by Coherent OTDR Employing Frequency Division Multiplexing
Hiroyuki Iida, Yusuke Koshikiya, Fumihiko Ito, Kuniaki Tanaka (NTT) OFT2011-38
We have proposed a high sensitivity coherent optical time domain reflectometry employing frequency division multiplexing... [more] OFT2011-38
pp.35-40
OFT, OCS
(Joint)
2011-08-26
14:55
Hokkaido   Centimeter-level spatial resolution over 40 km realized by bandwidth-division phase-noise-compensated OFDR
Xinyu Fan, Yusuke Koshikiya, Fumihiko Ito (NTT) OFT2011-27
We present a bandwidth-division phase-noise-compensated optical frequency domain reflectometry (PNC-OFDR) technique, whi... [more] OFT2011-27
pp.53-58
OFT 2011-01-27
16:25
Nagasaki   Fading noise suppression in OFDR by optical frequency comb and variable delay line
Takushi Kazama, Zuyuan He (Univ. Tokyo), Yusuke Koshikiya, Xinyu Fan, Fumihiko Ito (NTT), Kazuo Hotate (Univ. Tokyo) OFT2010-54
Optical reflectometry is a technique for distributed measurements which gives the profile of reflections and backscatter... [more] OFT2010-54
pp.37-42
ITE-BCT, OCS, OFT, IEE-CMN
(Joint) [detail]
2010-11-19
09:50
Osaka SEI Ikoma Seminar House Measurement of high-birefringence section for terrestrial optical link length using PNC-OFDR
Xinyu Fan, Yusuke Koshikiya, Fumihiko Ito (NTT) OCS2010-95
For installed optical fiber cables, there exist a lot of such cases: if one part of section has high polarization mode d... [more] OCS2010-95
pp.35-40
LQE, OPE, OCS 2010-10-29
17:20
Fukuoka Mojiko Retro Town, Minato house Characteristics of PNC-OFDR in acoustic noise environment
Yusuke Koshikiya, Xinyu Fan, Fumihiko Ito (NTT) OCS2010-87 OPE2010-123 LQE2010-96
 [more] OCS2010-87 OPE2010-123 LQE2010-96
pp.177-182
OCS, OFT
(Joint)
2010-08-27
09:10
Hokkaido Asahikawa Tokiwa Shimin Hall cm-level Resolution Reflectometry over 10-km Range with Phase Noise and Chromatic Dispersion Simultaneous Compensation
Yusuke Koshikiya, Xinyu Fan, Fumihiko Ito (NTT Corp.), Zuyuan He, Kazuo Hotate (The Univ. of Tokyo) OCS2010-45
(Advance abstract in Japanese is available) [more] OCS2010-45
pp.53-58
OFT 2010-05-28
10:45
Hiroshima tomo-kouminkan Ultra High Dynamic Range Coherent Optical Time Domain Reflectometry Employing Frequency Division Multiplexing
Hiroyuki Iida, Yusuke Koshikiya, Fumihiko Ito, Kuniaki Tanaka (NTT Corp.) OFT2010-13
We report ultra high dynamic range coherent optical time domain reflectometry employing frequency division multiplexing ... [more] OFT2010-13
pp.63-66
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