Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Wakako Maeda"'
Autor:
Ken-ichiro Yoshino, Shigehito Miki, Akihisa Tomita, Seigo Takahashi, Yoshihiro Nambu, Akihiro Tanaka, Mikio Fujiwara, Akio Tajima, Zhen Wang, Masahide Sasaki, Wakako Maeda
Publikováno v:
Optical Fiber Technology. 16:55-62
Quantum key distribution (QKD) systems can generate unconditionally secure common key between remote users. Improvement of QKD performance, particularly on key generation rate, has been required to meet current network traffic. The present paper cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d24d9aac560329735e91e8fc7f054993
https://doi.org/10.1016/j.yofte.2009.10.003
https://doi.org/10.1016/j.yofte.2009.10.003
Autor:
Hidemi Noguchi, Kiyoshi Fukuchi, Junichi Abe, Tatsuya Nakamura, Emmanuel Le Taillandier de Gabory, Sadao Fujita, Wakako Maeda
Publikováno v:
APCC
We demonstrated experimentally the improvement of the transmission distance by 27% of 150Gb/s signal at 3b/s/Hz with a novel TCM format, 8-state 12QAM TCM, compared to PM-8QAM. We also demonstrated improvement of the transmission distance for multipl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3297ae7dcf21265103d9a9db33709a4a
https://doi.org/10.1109/apcc.2015.7412600
https://doi.org/10.1109/apcc.2015.7412600
Autor:
Emmanuel Le Taillandier de Gabory, Hidemi Noguchi, Junichi Abe, Kiyoshi Fukuchi, Wakako Maeda, Tatsuya Nakamura
Publikováno v:
2015 European Conference on Optical Communication (ECOC).
We propose a new 4D coded modulation format, 64SP-12QAM, with same SE as PM-8QAM and straightforwardly-switchable with PM-16QAM. We experimentally demonstrated over 0.2 dB better sensitivity for 64SP-12QAM compared to PM-8QAM, enabling a transmission
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74d4a9036d98dab6716c75108d4beccd
https://doi.org/10.1109/ecoc.2015.7341874
https://doi.org/10.1109/ecoc.2015.7341874
Autor:
Kiyoshi Fukuchi, Emmanuel Le Taillandier de Gabory, Tatsuya Nakamura, Wakako Maeda, Hidemi Noguchi, Junichi Abe
Publikováno v:
2015 Opto-Electronics and Communications Conference (OECC).
We propose multi-redundancy optical coded modulation using superposed trellis. We experimentally prove that our scheme enables fine adaptive SE control and high coding gain of 7.1dB for 3-bit redundant 16QAM with quarterly reduced circuit complexity.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c37508634ec441a4051fc97e325d178
https://doi.org/10.1109/oecc.2015.7340337
https://doi.org/10.1109/oecc.2015.7340337
Autor:
Emmanuel Le Taillandier de Gabory, Junichi Abe, Tatsuya Nakamura, Kiyoshi Fukuchi, Sadao Fujita, Wakako Maeda, Hidemi Noguchi
Publikováno v:
OFC
We evaluated experimentally 2, 8, 32 state 32Gbaud TCM-QPSK and TCM-16QAM. TCM offers finer configuration for flexible transponders increasing SE, on 1.1dB wider ranges. TCM may also be used with HD-FEC in lower power transceivers.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::018b5a045702768180670241b99245bb
https://doi.org/10.1364/ofc.2015.w3k.3
https://doi.org/10.1364/ofc.2015.w3k.3
Autor:
Hidemi Nopuchi, Kohei Hosokawa, Tun-ichi Abe, Wakako Maeda, Atsufumi Shihavama, Kivoshi Fukuchi
Publikováno v:
OFC
Challenges of circuit resource reduction in digital back propagation toward practical implementation is demonstrated. A linear filter circuit resource is effectively reduced using frequency domain processing and filter coefficient optimization for lO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15bb320d35f5fae1973b19b9abb34585
https://doi.org/10.1364/ofc.2015.tu3b.3
https://doi.org/10.1364/ofc.2015.tu3b.3
Autor:
Ken-ichiro Yoshino, Masahide Sasaki, Akihisa Tomita, Shigehito Miki, Akihiro Tanaka, Wakako Maeda, Wang Zhen, Akio Tajima, Burm Baek, Sae Woo Nam, Mikio Fujiwara, Seigo Takahashi, Yoshihiro Nambu
Publikováno v:
OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.
The world's fastest BB84 QKD through a 97-km installed fiber was demonstrated using PLC-based interferometers, SSPDs and WDM synchronization. By suppressing nonlinear crosstalk induced by the multiplexed clock, QBER of 2.8% was obtained after 97-km t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eb7c84507b5251e1947df7cbcb36ac8
https://doi.org/10.1109/ofc.2008.4528716
https://doi.org/10.1109/ofc.2008.4528716
Publikováno v:
2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference.
A burst-length-setting and phase-optimization technique were proposed for use in QKD, and we demonstrated their repeatability. QKD could automatically be installed on a strange optical line with these techniques.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d12afe9177c4d43141b89b1f6e19625d
https://doi.org/10.1109/ofc.2006.215802
https://doi.org/10.1109/ofc.2006.215802
Publikováno v:
OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..
A high-speed QKD system, which has an automatic modulation-phase-alignment mechanism for compensating for GVD, was developed. Using this system, we confirmed high-speed and stable quantum key distribution with transmission over 40 km was possible.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bb0a451e43869ddacd0d0ebf9ddc2ee
https://doi.org/10.1109/ofc.2005.192754
https://doi.org/10.1109/ofc.2005.192754
Autor:
Seigo Takahashi, Burm Baek, Akihiro Tanaka, Mikio Fujiwara, Akio Tajima, Akihisa Tomita, Zhen Wang, Ken-ichiro Yoshino, Sae Woo Nam, Yoshihiro Nambu, Shigehito Miki, Masahide Sasaki, Wakako Maeda
Publikováno v:
Optics Express. 16:11354
We demonstrated ultra fast BB84 quantum key distribution (QKD) transmission at 625 MHz clock rate through a 97 km field-installed fiber using practical clock synchronization based on wavelength-division multiplexing (WDM). We succeeded in over-one-ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dd29fe946e5dd31ab563eb62088ae2c
https://doi.org/10.1364/oe.16.011354
https://doi.org/10.1364/oe.16.011354