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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 21  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
OFT, OCS, LSJ
(Joint) [detail]
2019-08-30
12:15
Hokkaido   Development of High-Density Optical Fiber Cable with High-Strength Sheath to Resist Biological Attack
Yuta Maruo, Yohei Endo, Yusuke Yamada, Shigekatsu Tetsutani, Hisashi Izumita, Hiroaki Tanioka (NTT) OFT2019-31
We have already developed high- density optical fiber cable using rollable optical fiber ribbons. However, these cables ... [more] OFT2019-31
pp.37-41
OFT 2019-05-17
11:10
Osaka I-site NANBA Development of optical cable for direct burial
Yohei Endo, Yuta Maruo, Yusuke Yamada, Hisashi Izumita, Hiroaki Tanioka (NTT) OFT2019-23
In recent years, in order to secure safety and smooth traffic at the time of disasters, and to secure a landscape, it is... [more] OFT2019-23
pp.97-101
OCS, OFT, LSJ
(Joint) [detail]
2018-08-31
11:20
Hokkaido Hakodate Hokuyo Building 8Kai Hall Optical Loss Characteristics of Ultra-high-density Cable and Dependency of Measured Lateral Pressure to Fibers in Cable-core
Yusuke Yamada, Masashi Kikuchi, Junichi Kawataka, Hisashi Izumita, Kazunori Katayama, Hiroaki Tanioka (NTT) OFT2018-10
(Advance abstract in Japanese is available) [more] OFT2018-10
pp.19-23
OCS, OFT, OPE
(Joint) [detail]
2017-02-17
15:45
Osaka Osaka Prefecture University(I-site Nanba) Optical loss characteristics of SZ-stranded high-density 1000-fiber cable with rollable 80-optical-fiber ribbons
Masashi Kikuchi, Yusuke Yamada, Junichi Kawataka, Hisashi Izumita, Toshio Kurashima, Katayama Kazunori (NTT) OFT2016-56 OPE2016-177
This paper describes the advanced optical characteristics of a high-density 1000-fiber cable with SZ-stranded units hous... [more] OFT2016-56 OPE2016-177
pp.59-63(OFT), pp.89-93(OPE)
OFT 2015-01-22
14:50
Miyazaki   Property of birefringence of bent optical fiber.
Masashi Kikuchi, Junichi Kawataka, Hisashi Izumita, Toshio Kurashima (NTT) OFT2014-46
We are investigating quantitative methods to evaluate bending of optical fibers assembled in cable. In this paper, we es... [more] OFT2014-46
pp.11-14
OFT 2014-10-23
16:40
Hyogo   [Special Talk] Management technology of optical fiber distribution in central office -- Basic course in OFT (Optical Fiber Technology) --
Hisashi Izumita (NTT) OFT2014-30
High speed IP-connection service has been delivered on optical fiber access networks. A huge number of optical fibers ar... [more] OFT2014-30
pp.39-44
OFT 2014-01-24
16:30
Tokyo   Study of High-Density 1000-fiber Cable Assembled from High-Fiber-Count Rollable Optical Fiber Ribbon
Yusuke Yamada, Masashi Kikuchi, Hisashi Izumita, Toshio Kurashima (NTT) OFT2013-52
 [more] OFT2013-52
pp.31-34
OFT 2013-01-24
14:55
Tokushima   Numerical simulation of fiber-optic distributed temperature measurement
Masahiro Miyamoto, Taku Itou, Shigeki Takeda, Hisashi Izumita, Yahei Koyamada (Ibaraki Univ.) OFT2012-56
Numerical simulations were conducted to investigate the ability of a sensing system based on a coherent OTDR with a prec... [more] OFT2012-56
pp.19-24
OFT 2013-01-24
15:20
Tokushima   Measurement range enlargement in fiber-optic distributed strain and temperature sensing by coherent OTDR
Akio Togo, Tomoaki Sudo, Hisashi Izumita, Yahei Koyamada (Ibaraki Univ.), Li Che-Hsien, Kinzo Kishida (Neubrex) OFT2012-57
We extended measurand range of a coherent OTDR by introducing a fully tunable DFB laser whose optical frequency can be p... [more] OFT2012-57
pp.25-30
OFT 2012-01-20
09:25
Kagawa   Single-mode Optical Fiber Cleaving Condition for Physical Contact Connection with Cleaved and Unpolished Endface
Ryo Koyama, Kazuhide Nakajima, Hisashi Izumita, Toshio Kurashima (NTT) OFT2011-66
Physical contact (PC) connection is a butt jointing technique for optical fibers, in which fiber cores are brought into ... [more] OFT2011-66
pp.51-54
OFT, OCS
(Joint)
2011-08-26
14:05
Hokkaido   Fiber-Optic Distributed Temperature Measurement With Very High Resolution Over Long Range Based on Rayleigh Backscatter Traces Obtained With Coherent OTDR
Akio Togo, Yuta Iitsuka, Ryosuke Shimano, Hisashi Izumita, Yahei Koyamada (Ibaraki Univ.) OFT2011-25
Experiments and numerical simulations were conducted to find a possible performance of a technique for measuring distrib... [more] OFT2011-25
pp.43-48
OFT, OCS
(Joint)
2011-08-26
14:30
Hokkaido   Distributed vibration ditection with very high sensitivity using coherent OTDR
Yuta Iitsuka, Akio Togo, Hisashi Izumita, Yahei Koyamada (Ibaraki Univ.) OFT2011-26
This paper presents some experimental results on the distributed vibration detection along a fiber based on the Rayleigh... [more] OFT2011-26
pp.49-52
OFT 2011-01-27
13:50
Nagasaki   Design and performance of ultra-high-density optical fiber cable with rollable optical fiber ribbon
Yusuke Yamada, Hisashi Izumita, Toshio Kurashima, Kunihiro Toge, Kazuo Hogari (NTT) OFT2010-49
This paper describes the structural design of the rollable optical fiber ribbon and the performance of ultra-high-densit... [more] OFT2010-49
pp.9-14
OFT, OCS
(Joint)
2009-08-27
15:00
Hokkaido   Cable height measurement system using ultrasonic pulse-echo technique
Yasuomi Uchiyama, Naoki Kaneko, Hiroshi Tanaka, Youichi Yuki (Ntt East), Hirotaka Yoshida (Airec), Masanori Usui (Nttrec), Takao Handa (Ntt), Hisashi Izumita (Ntt East) OFT2009-21
In order to reduce the operators’ work when periodically inspecting the outside cables in NTT, a remotely measurement sy... [more] OFT2009-21
pp.21-24
OFT 2009-01-23
11:20
Kochi   Analysis on performance deterioration of optical fiber joints with mixtureed of refractive index matching material and air-filled gaps
Ryuichiro Nagano, Morikazu Uchino, Yoichi Yuki, Hideyuki Sonoda, Hiroshi Onose, Mitsuru Kihara, Hisashi Izumita, Nobuo Kuwaki (NTT-East) OFT2008-84
We experimentally investigated the performance of optical fiber joints with a mixture of refractive index matching mater... [more] OFT2008-84
pp.63-66
OFT 2007-03-02
15:30
Tokyo   Damage to optical networks by wildlife and methods for protecting existing optical fiber cables in the FTTH era
Hiroshi Tanaka, Tomoyuki Iwata, Tetsuya Kaiden, Toshiyuki Nenoi, Hisashi Izumita (NTT East) OFT2006-75
This paper describes a 1999-2005 analysis of damage to optical networks by wildlife and proposes methods for protecting ... [more] OFT2006-75
pp.21-24
OFT 2007-01-26
09:15
Mie   High spatical resolution measurement using an OTDR enhanced with a dead-zone-free signal analysis method
Noriyuki Araki (NTT), Hisashi Izumita (NTT East), Yusuke Koshikiya (NTT) OFT2006-63
In the FTTH era, we must provide effective and efficient maintenance for optical cable networks. With a view to realizin... [more] OFT2006-63
pp.57-60
ITE-BCT, IEE-CMN, OCS, OFT
(Joint) [detail]
2006-11-16
13:30
Tokyo   Optical Fiber Line Testing System Design Considering Outside Environment for PON Fibers with Individually Assigned BFSs
Nazuki Honda, Daisuke Iida (NTT), Hisashi Izumita (NTT East Corp.), Fumihiko Ito (NTT) OFT2006-40
 [more] OFT2006-40
pp.1-4
OFT 2006-05-11
14:20
Fukuoka KYUSHU UNIVERSITY Identification fibers with individually assigned Brillouin frequency shifts for fault location in passive optical networks
Daisuke Iida, Nazuki Honda, Hisashi Izumita, Fumihiko Ito (NTT) OFT2006-3
Passive Optical networks (PONs) provide the main FTTH service based on GE-PON. To reduce maintenance costs, we must deve... [more] OFT2006-3
pp.9-12
IEE-CMN, OFT, OCS, ITE-BCT
(Joint)
2005-11-25
13:30
Osaka The Kansai Electric Power Co.,INC. [Special Talk] The standardization trend of optical fiber maintenance in optical access network
Hisashi Izumita (NTT)
An optical fiber line monitoring system is essential for reducing OA&M costs and improving service reliability in optica... [more] OCS2005-85
pp.55-60
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