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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| OFT | 2025-01-24 10:40 |
Osaka | (Osaka, Online) (Primary: On-site, Secondary: Online) |
Simultaneous Measurement of Chromatic Dispersion and Nonlinear Coefficient Using Phase-Modulated Light Yukitaka Katsumata, Shiro Ryu (Meiji Univ.) |
(To be available after the conference date) [more] | |
| OFT | 2024-10-10 10:10 |
Tokyo | (Tokyo, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Measurement of Optical Phase Noise Using Differential Phase Yukitaka Katsumata, Shiro Ryu (Meiji Univ.)  OFT2024-40 |
The spread of smartphones and other devices has led to a demand for larger-capacity optical communications, and the dema... [more] | OFT2024-40 pp.37-42 |
| OCS, OFT, LSJ (Joint) [detail] |
2024-08-23 13:25 |
Hokkaido | (Hokkaido) | Optical phase noise measurement method using optical delay interferometer under polarization fluctuation environment Shiro Ryu (Meiji Univ.) OFT2024-28 |
We have previously proposed an optical phase noise measurement method using a Michelson interferometer and performed lon... [more] | OFT2024-28 pp.41-46 |
| OFT, OCS, LSJ (Joint) [detail] |
2023-08-25 09:55 |
Hokkaido | (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Continuous time-domain measurement method of Rayleigh backscattered light Shiro Ryu (Meiji Univ.) OFT2023-13 |
We have proposed a method that enables continuous measurement of backscattered light from a specific point of an optical... [more] | OFT2023-13 pp.21-26 |
| OPE, OCS, LQE | 2022-10-20 14:45 |
Ehime | (Ehime, Online) (Primary: On-site, Secondary: Online) |
Study of MIMO Optical Wireless Communication System Using Maximum Likelihood Estimation Kouki Seitaibashi, Shiro Ryu (Meiji Univ.) OCS2022-20 OPE2022-66 LQE2022-29 |
The development of Internet technologies such as smartphones and computers has created congestion on mobile networks and... [more] | OCS2022-20 OPE2022-66 LQE2022-29 pp.16-21 |
| OPE, OCS, LQE | 2022-10-20 15:10 |
Ehime | (Ehime, Online) (Primary: On-site, Secondary: Online) |
Signal Phase Recovery Using Digital Signal Processing in Optical Wireless Communication Systems Ryoma Murakami, Shiro Ryu (Meiji Univ.) OCS2022-21 OPE2022-67 LQE2022-30 |
Research and development of optical wireless communication systems has been active. Optical receivers usually use a phas... [more] | OCS2022-21 OPE2022-67 LQE2022-30 pp.22-27 |
| OFT | 2021-10-15 13:00 |
Online | Online (Online) | [Tutorial Invited Lecture]
Coherent optical communication technology and my research life Shiro Ryu (Meiji Univ.) OFT2021-48 |
Coherent optical communication technology was proposed at the end of the 1970s, and after about 30 years, it was put int... [more] | OFT2021-48 pp.104-109 |
| OFT, OCS, LSJ (Joint) [detail] |
2021-08-26 14:45 |
Online | Online (Online) | A method for continuously measuring backscattered light at an arbitrary point on an optical fiber Shiro Ryu (Meiji Univ.), Takafumi Tsuboya (SECOM) OFT2021-14 |
We have proposed a continuous measurement method for Rayleigh backscattered light in the time domain at any point on the... [more] | OFT2021-14 pp.13-18 |
| OFT | 2020-10-09 09:15 |
Online | Online (Online) | Measurement of Spatial Distribution of Fiber Birefringence by Coherent Heterodyne Detection of Rayleigth Backscattered Light Nanako Takei, Shiro Ryu (Meiji Univ.) OFT2020-25 |
Since the coherent technology uses the phase information of light, it can be applied to various optical measurement tech... [more] | OFT2020-25 pp.62-67 |
| OFT | 2020-10-09 09:40 |
Online | Online (Online) | Theoretical Study of Fiber Brillouin Scattering Using FDTD Method Shiori Nozawa, Shiro Ryu (Meiji Univ.) OFT2020-26 |
Brillouin scattering is known as a nonlinear phenomenon that occurs in an optical fiber. So far, we have measured the a... [more] | OFT2020-26 pp.68-73 |
| OFT | 2020-10-09 14:55 |
Online | Online (Online) | Optical Time/Frequency Domain Reflectometry for Continuous Time-Domain Measurement of Rayleigh Backscattered Light Takafumi Tsuboya, Shiro Ryu (Meiji Univ.) OFT2020-35 |
It is not possible to measure high speed frequency fluctuations that occur in the optical transmission line because conv... [more] | OFT2020-35 pp.112-117 |
| OFT, OCS, LSJ (Joint) [detail] |
2019-08-30 09:30 |
Hokkaido | (Hokkaido) | Dynamic Routing Experiments by Cooperation of SDN and Optical Wireless Communication Junya Tomaki, Shiro Ryu (Meiji Univ) OCS2019-25 |
In recent years, communication devices such as smart phones are increasing, so the communication traffic increase has a ... [more] | OCS2019-25 pp.29-34 |
| OFT, OCS, IEE-CMN, ITE-BCT [detail] | 2017-11-23 16:40 |
Osaka | Kansa-Univ. Umeda Campus (Osaka) | Study on Two-Dimensional Signal-to-Noise Ratio Distribution in Optical Wireless Communications Shiro Ryu (Meiji Univ.) OCS2017-63 |
(Advance abstract in Japanese is available) [more] | OCS2017-63 pp.35-40 |
| OFT | 2015-01-22 14:25 |
Miyazaki | (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 |
| PN | 2013-03-11 15:20 |
Okinawa | Okinawa-ken Seinen-Kaikan (Okinawa) | [Invited Talk]
Recent trend of wavelength unbundling in optical access network Shiro Ryu (SoftBank Telecom) PN2012-85 |
Research and development of TDM/WDM-PON (TWDM-PON) system, which enables us to construct multiple TDM-PONs on the same P... [more] | PN2012-85 pp.43-48 |
| OFT, OCS, ITE-BCT, IEE-CMN (Joint) [detail] |
2012-11-22 14:15 |
Kumamoto | (Kumamoto) | Wavelength unbundling of PON with TDM/WDM-PON system Shiro Ryu (SoftBank Telecom) OCS2012-84 |
Research and development is in progress regarding TDM/WDM-PON (TWDM-PON) system that enables us to construct multiple TD... [more] | OCS2012-84 pp.73-78 |
| OCS, OFT, ITE-BCT, IEE-CMN (Joint) [detail] |
2011-11-18 14:30 |
Shimane | Shimane Univ. (Shimane) | OTDR measurement method for differentiating cause of loss in vicinity of fiber splice point Shiro Ryu (SoftBank Telecom) OCS2011-103 |
We have been studying a novel OTDR measurement method using a macrobending indicator to measure the cause of the loss in... [more] | OCS2011-103 pp.59-64 |
| PN | 2011-02-28 16:00 |
Kagoshima | KKR Kagoshima Keitenkaku (Kagoshima) | [Invited Talk]
Perspective on future networks Shiro Ryu (SoftBank Telecom Corp.) PN2010-67 |
We had studied intensively on wavelength path network. Our results include demonstrations on wavelength-on-demand and w... [more] | PN2010-67 pp.59-64 |
| CS, OCS (Joint) |
2010-01-29 14:30 |
Yamaguchi | Kaikyo Messe Shimonoseki (Yamaguchi) | Application of all-optical 3R-regenerator to 80-Gbit/s RZ-DQPSK optical communication systems Shiro Ryu, Mikio Yagi (SoftBank Telecom) OCS2009-116 |
Studies on coherent optical receivers using digital signal processing are progressing rapidly. However, applicable tran... [more] | OCS2009-116 pp.93-98 |
| OFT, OCS, IEE-CMN, ITE-BCT (Joint) [detail] |
2009-11-27 14:35 |
Fukushima | (Fukushima) | [Invited Talk]
Proposal of fiber macrobending identification method Shiro Ryu, Mikio Yagi (SoftBank Telecom) OCS2009-98 OFT2009-61 |
Macrobending loss that occurs at a junction point of optical cables might become harmful to system operation since the l... [more] | OCS2009-98 OFT2009-61 pp.87-92(OCS), pp.41-46(OFT) |
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