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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| 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 |
| EMD | 2017-03-03 15:55 |
Chiba | Study on loss variation measurement of branched fibers(7) Takaaki Endo, Ryo Nagase (CIT) EMD2016-109 |
The sensing for disaster prevention is fiber optic sensing is effective. A widespread and accuracy monitoring systems ha... [more] | EMD2016-109 pp.41-44 |
|
| LQE, OPE, EMD, R, CPM | 2016-08-26 08:50 |
Hokkaido | Study on loss variation measurement of branched fibers (6) Takaaki Endo, Ryo Nagase (CIT) R2016-33 EMD2016-37 CPM2016-46 OPE2016-67 LQE2016-42 |
We propose the measurement method of loss variation on branched fibers. This method can detect where the fault location,... [more] | R2016-33 EMD2016-37 CPM2016-46 OPE2016-67 LQE2016-42 pp.71-75 |
|
| 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 |
| OFT, OCS, OPE (Joint) [detail] |
2016-02-18 10:20 |
Okinawa | Okinawa Univ. | Numerical simulation on fiber-optic distributed dynamic-strain sensing with coherent OTDR Yahei Koyamada, Mitsuharu Shiwa (NIMS), Kinzo Kishida (Neubrex) OFT2015-58 OPE2015-218 |
To investigate a potential application of the coherent OTDR in the field of measuring distributed dynamic strain or dete... [more] | OFT2015-58 OPE2015-218 pp.17-22 |
| 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 |
| EMD | 2015-11-06 12:15 |
Miyagi | Tohoku University, School of engineering, Aoba memorial hall | Study on loss variation measurement of branched fibers Takaaki Endo, Ryo Nagase (CIT) EMD2015-80 |
We propose the measurement method of loss variation on branched fibers. This method can detect where the fault location,... [more] | EMD2015-80 pp.71-75 |
| CPM, OPE, LQE, R, EMD | 2015-08-28 15:50 |
Aomori | Aomori-Bussankan-Asupamu | Study on loss variation measurement of branched fibers (5) Takaaki Endo, Ryo Nagase (CIT) R2015-48 EMD2015-56 CPM2015-72 OPE2015-87 LQE2015-56 |
We propose that the method is the surveying of loss variation. The loss variation is shown on the location and the root,... [more] | R2015-48 EMD2015-56 CPM2015-72 OPE2015-87 LQE2015-56 pp.125-128 |
| EMD | 2015-03-06 13:05 |
Chiba | Chiba Institute of Technology | Study on loss variation measurement of branched fibers (4) Takaaki Endo, Ryo Nagase (CIT) EMD2014-112 |
We simulated loss variation on 8 branched fiber, using loss variation calculation formula. Then, we estimated the measur... [more] | EMD2014-112 pp.1-4 |
| OFT | 2015-01-22 14:25 |
Miyazaki | Fiber Macrobending Radius Estimation Method by Two-Wavelength Unidirectional OTDR Measurement Shiro Ryu (SoftBank Telecom) OFT2014-45 |
Macrobending of optical fibers might affect the transmission system performance if the induced loss becomes large. So, ... [more] | OFT2014-45 pp.7-10 |
|
| EMD | 2014-10-17 15:00 |
Tokyo | Study on loss variation measurement of branched fibers Takaaki Endo, Ryo Nagase (Chiba Inst. of Tech.) EMD2014-62 |
It is difficult of PDS (Passive Double Star) System to identify the fault location at branched fibers from the root. Thi... [more] | EMD2014-62 pp.13-17 |
|
| 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 |
| EMD, LQE, OPE, CPM, R | 2014-08-22 17:20 |
Hokkaido | Otaru Economy Center | Study on loss variation measurement of branched fibers (2) Takaaki Endo, Ryo Nagase (Chiba Inst. of Tech.) R2014-53 EMD2014-58 CPM2014-73 OPE2014-83 LQE2014-57 |
We propose the each branched fiber loss detection method. Generally, it is difficult to identify fault location from the... [more] | R2014-53 EMD2014-58 CPM2014-73 OPE2014-83 LQE2014-57 pp.155-158 |
| EMD | 2014-05-16 15:50 |
Miyagi | Ｉｓｈｉｎｏｍａｋｉ Senshu University | Study on loss variation measurement of branched fibers Takaaki Endo, Ryo Nagase (Chiba Inst. of Tech.) EMD2014-7 |
It is difficult of PDS (Passive Double Star) System to identify the fault location at branched fibers from the root. Thi... [more] | EMD2014-7 pp.35-38 |
| OFT | 2013-10-25 09:25 |
Nara | [Fellow Memorial Lecture]
Techniques to evaluate optical fiber cables and to sense distributed strain and temperature based on Brillouin scattering Tsuneo Horiguchi (Shibaura Inst. of Tech.) OFT2013-33 |
Brillouin scattering usually degrades the quality of signals in optical fiber communication systems. On the other hand, ... [more] | OFT2013-33 pp.51-56 |
|
| OFT, OCS (Joint) |
2013-08-22 15:50 |
Hokkaido | Ranging Experiments for Moving Water-Surfaces and its Depth Tatsuya Yoshii, Yoshiaki Yamabayashi (Chitose Inst. of Science and Tech.) OCS2013-40 |
We have already reported water-surface ranging techniques for short-range optical altimeter to be used by seaplanes for ... [more] | OCS2013-40 pp.23-26 |
|
| OFT | 2013-05-23 14:00 |
Okinawa | High density FDM-OTDR with apodization of the probe pulse and suppression of the nonlinear effect Hiroyuki Iida, Kunihiro Toge, Fumihiko Ito (NTT) OFT2013-1 |
We have developed a high sensitivity coherent optical time domain reflectometry employing frequency division multiplexi... [more] |
OFT2013-1 pp.1-4 |
|
| 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 |
|
| LQE | 2012-12-13 11:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | 1550nm/1310nm dual wavelength high power LD Shintaro Morimoto, Hiroshi Mori, Atsushi Yamada, Yasuaki Nagashima, Motoaki Fujita, Shinichi Onuki, Hiroaki Yoshidaya, Kazuaki Mise (Anritsu Devices) LQE2012-125 |
We have developed a high power 1550nm/1310nm dual wavelength laser diode, which is suitable for Optical Time Domain Refl... [more] | LQE2012-125 pp.19-22 |
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