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 Results 1 - 20 of 23  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
OPE, OCS, LQE 2022-10-20
14:45
Ehime
(Primary: On-site, Secondary: Online)
A 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
(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 [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 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 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 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 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   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 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   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 [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   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. 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 [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 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   [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)
OCS 2008-07-17
16:05
Yamanashi   Feasibility study of 160-Gbit/s, Polarization-Division Multiplexed RZ-DQPSK Transmission System under Polarization Fluctuation over Installed Cables
Mikio Yagi, Shuichi Satomi, Shiro Ryu (Softbank Telecom) OCS2008-30
In this paper, we report the feasibility study results of 160-Gbit/s, polarization-division multiplexed (PDM) RZ-DQPSK t... [more] OCS2008-30
pp.53-58
OCS, PN, CS
(Joint)
2007-06-15
11:10
Hokkaido Chitose Inst. of Science and Technology All-optical 2R-Regenerative interconnection node for DPSK polarization-division multiplexed systems
Mikio Yagi, Shuichi Satomi, Shiro Ryu (Softbank Telecom) OCS2007-18
In this paper, we propose an all-optical 2R-regenerative interconnection node that connects wide area network (WAN) and ... [more] OCS2007-18
pp.47-52
OFT 2007-05-24
17:15
Kagoshima   Optical Fiber Nonlinearity Coefficient Measurement with Coherent Heterodyne Detection
Shiro Ryu (SBTM) OFT2007-8
Various methods have been proposed for the measurement of optical fiber nonlinearity coefficient using the self-phase mo... [more] OFT2007-8
pp.35-38
OCS, NS
(Joint)
2006-01-26
13:55
Osaka Osaka Institute of Technologies Field trial of optical 3R regenerator over installed cable
Mikio Yagi, Shuichi Satomi, Shiro Ryu (Japan Telecom), Mutsumi Aoyagi, Koji Okamura (Kyushu Univ.), Shoichiro Asano (NII)
In this paper, we report the field trial results of an optical 3R regenerator that we have successfully demonstrated usi... [more] OCS2005-91
pp.13-18
 Results 1 - 20 of 23  /  [Next]  
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