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All Technical Committee Conferences (All Years)
| 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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