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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 22  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
IN, CCS
(Joint)
2020-08-03
13:25
Online Online A Study on Recovery from Packet Forwarding Errors Caused by Mutual-Exclusion-free PIT of a Multi-core NDN Router
Ryo Koyama (Osaka Univ.), Junji Takemasa (KDDI Research, Inc.), Yuki Koizumi (Osaka Univ.), Atsushi Tagami (KDDI Research, Inc.), Toru Hasegawa (Osaka Univ.) IN2020-14
A Named Data Networking (NDN) router stores incoming faces from which Interest packets are received at a Pending Interes... [more] IN2020-14
pp.31-36
IN 2020-01-23
16:05
Aichi WINC AICHI A Design of PIT without Mutual Exclusion for Multi-Threading NDN Stateful Forwarding
Yuki Koizumi (Osaka Univ.), Junji Takemasa (KDDI Reserch Inc.), Ryo Koyama (Osaka Univ.), Atsushi Tagami (KDDI Reserch Inc.), Toru Hasegawa (Osaka Univ.) IN2019-70
Named data networking (NDN) uses Interest packets to request content and Data packets to convey the content. While Inte... [more] IN2019-70
pp.31-36
OFT 2019-10-11
09:35
Niigata Ekimae-Office-Kashikaigishitsu (Niigata) Investigation into the influence of high-power transmission on fiber withdrawal of optical connector
Chisato Fukai, Yoshiteru Abe, Masaaki Takaya, Ryo Koyama, Kazunori Katayama (NTT) OFT2019-32
In an optical connector manufactured by fixing silica fiber in a zirconia ferrule with an epoxy adhesive, a change in co... [more] OFT2019-32
pp.1-6
OFT 2019-10-11
10:50
Niigata Ekimae-Office-Kashikaigishitsu (Niigata) A Study on High Precision Multiple-fiber Push-On Connector for Reference Connection Application
Ryo Koyama, Yoshiteru Abe, Chisato Fukai, Masaaki Takaya (NTT) OFT2019-35
We developed single-mode multi-fiber push-on (MPO) connectors with splice losses below 0.2 dB for reference use in a sta... [more] OFT2019-35
pp.17-21
OPE, OCS, OFT
(Joint) [detail]
2018-02-16
14:20
Okinawa Okinawa Prefectural Museum A Study of Fiber Cleaving Technique Breaking Fiber with a Tension Force for a New Single-Fiber Cleaver utilized in Fiber Splicing
Ryo Koyama, Chisato Fukai, Masaaki Takaya, Kazunori Katayama (NTT) OFT2017-78 OPE2017-186
(Advance abstract in Japanese is available) [more] OFT2017-78 OPE2017-186
pp.53-56(OFT), pp.91-94(OPE)
OFT, OCS, IEE-CMN, ITE-BCT [detail] 2017-11-24
10:45
Osaka Kansa-Univ. Umeda Campus Electrically driven multifiber switching technique employing MT ferrule with non-circle guide holes
Chisato Fukai, Mitsuru Kihara, Ryo Koyama, Yoshiteru Abe, Masaaki Takaya, Kazunori Katayama (NTT) OFT2017-51
We studied multifiber switching technique which used switching connector and electrical driven equipment. The switching ... [more] OFT2017-51
pp.37-42
OCS, OFT, OPE
(Joint) [detail]
2017-02-17
15:20
Osaka Osaka Prefecture University(I-site Nanba) Novel equipment for inspecting fiber eccentricities in MT/MPO connector to enable high speed measurement
Mitsuru Kihara, Ryo Koyama, Chisato Fukai, Kazunori Katayama, Toshio Kurashima (NTT) OFT2016-55 OPE2016-176
To achieve a low-loss multi-fiber connector such as MT or MPO connectors, it is important to inspect fiber eccentricitie... [more] OFT2016-55 OPE2016-176
pp.53-57(OFT), pp.83-87(OPE)
OFT 2017-01-20
14:35
Tokyo Kikaishinko Kaikan Investigation into the influence of high power transmission on joints between different types of fibers
Chisato Fukai, Ryo Koyama, Yoshiteru Abe, Mitsuru Kihara, Kazunori Katayama (NTT) OFT2016-38
Cutoff shifted fiber (CSF) is a low loss and low nonlinear fiber compared with other kinds of fibers. Therefore, it is e... [more] OFT2016-38
pp.15-20
OFT 2017-01-20
15:00
Tokyo Kikaishinko Kaikan Study on high fiber count single-mode optical fiber connector
Ryo Koyama, Chisato Fukai, Mitsuru Kihara, Toshio Kurashima (NTT) OFT2016-39
According to the increase of optical transmission rate, the usage of single-mode optical fiber is increasing. For the ea... [more] OFT2016-39
pp.21-24
OFT 2015-12-11
13:25
Tokyo The University of Electro-Communications (Tokyo) Investigation into the influence of high power transmission on MPO optical connector joints
Chisato Fukai, Kotaro Saito, Ryo Koyama, Mitsuru Kihara, Toshio Kurashima (NTT) OFT2015-46
We report the influence of high-power optical transmission on 4-fiber MPO connectors. We investigated the relationship b... [more] OFT2015-46
pp.5-8
OCS, OFT, IEE-CMN, ITE-BCT
(Joint) [detail]
2015-11-13
13:00
Ehime Matsuyama Civic Center Investigation into fracture characteristics of optical fibers with various cracks and their inspection method
Mitsuru Kihara, Kotaro Saito, Chisato Fukai, Ryo Koyama, Toshio Kurashima (NTT) OFT2015-42
The cracks on an optical fiber surface can grow with time and eventually lead to fiber breakage. We have investigated br... [more] OFT2015-42
pp.49-53
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, OPE 2011-03-04
18:10
Tokyo Kikai-Shinko-Kaikan Bldg. Splice characteristics of hole-assisted fiber
Kotaro Saito, Ryo Koyama, Kazuhide Nakajima, Toshio Kurashima (NTT Corp.) OFT2010-79 OPE2010-183
We investigate the splice losses characteristics observed in hole-assisted fiber (HAF) intrinsically. We experimentally ... [more] OFT2010-79 OPE2010-183
pp.83-87
OFT 2010-10-25
10:55
Saitama Nippon Institute of Technology A Study on a Splice Method for Coated Optical Fibers
Ryo Koyama, Kazuhide Nakajima, Masaaki Takaya, Toshihiko Sekiguchi, Toshio Kurashima (NTT) OFT2010-29
In the jointing of coated optical fibers, It needs the alignment error reducing of the fiber core which is come from the... [more] OFT2010-29
pp.7-10
OFT 2010-01-21
10:20
Okinawa   A Study on Jointing of Coated Optical Fiber
Ryo Koyama, Kazuhide Nakajima, Masaaki Takaya, Toshihiko Sekiguchi, Toshio Kurashima (NTT Corp.) OFT2009-62
A jointing of coated optical fiber can improve the handling properties. This requires cutting the fiber over its coating... [more] OFT2009-62
pp.1-4
OFT 2009-10-30
09:00
Oita   Mechanical splice loss characteristics for hole assisted fiber
Kotaro Saito, Ryo Koyama, Yoshiteru Abe, Kazuhide Nakajima, Toshio Kurashima (NTT Corp.) OFT2009-43
We studied about the relationship between structural parameters of hole-assisted fiber (HAF) and the condition of mechan... [more] OFT2009-43
pp.47-50
OFT 2009-01-23
10:15
Kochi   Insertion Loss of Hole Assisted Fiber in Mechanical Splice
Ryo Koyama, Kotaro Saito, Yoshiteru Abe, Tetsuya Hoshijima, Shigeru Tomita (NTT) OFT2008-82
We studied about the requirement to make the insertion loss of a mechanical splice in hole-assisted fibers low as one of... [more] OFT2008-82
pp.55-58
OFT, OCS, ITE-BCT, IEE-CMN
(Joint) [detail]
2008-11-20
09:35
Oita   A Study to apply HAF(Hole-Assisted Fiber) for Optical fibre cable joint
Shigeru Tomita, Tetsuya Hoshijima, Ryo Koyama, Kotaro Saito, Yoshiteru Abe (NTT), Koji Koseki (EXEO), Keisuke Sato (TTK), Takuya Sekine (Ikeno Tsuken) OFT2008-49
 [more] OFT2008-49
pp.15-18
OCS, OFT, ITE-BCT, IEE-CMN
(Joint) [detail]
2007-11-21
15:00
Osaka   A Novel Mode Converter using Tapered Fiber
Ryo Koyama, Mitsuru Kihara, Shigeru Tomita (NTT) OFT2007-41
Recently, the use of conventional single-mode fiber has become widespread, and the communication wavelength band is beco... [more] OFT2007-41
pp.13-16
OFT 2007-10-19
09:45
Toyama   Development of New Easily Assembled Mechanical Splicer for Direct Coated Optical Fiber -- To realize an easy optical connection technology --
Hitoshi Son, Mitsuru Kihara, Ryo Koyama, Shigeru Tomita (NTT) OFT2007-33
 [more] OFT2007-33
pp.7-12
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