Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Chihiro Kito"'
Publikováno v:
NTT Technical Review. 21:45-48
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::998d6d871499ff06b3fd2d0e139f475b
https://doi.org/10.53829/ntr202302gls
https://doi.org/10.53829/ntr202302gls
Publikováno v:
27th International Conference on Optical Fiber Sensors.
We investigate a machine learning algorithm that interprets distributed vibration in a telecommunication facility environment. This is the first evaluation on the accuracy of a classification algorithm using field data in a cable tunnel.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::628d787c2ba94582ea59ffc7f8abcad8
https://doi.org/10.1364/ofs.2022.w4.2
https://doi.org/10.1364/ofs.2022.w4.2
Autor:
Hiroshi Takahashi, Yoshifumi Wakisaka, Chihiro Kito, Takahiro Ishimaru, Daisuke Iida, Yusuke Koshikiya
Publikováno v:
27th International Conference on Optical Fiber Sensors.
We present a field demonstration of distributed vibration sensing with FDM-Φ-OTDR in a deployed optical fiber cable network. Additionally, we propose and verify a vibration trace analysis technique that can localize telecommunication facilities.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58b9b2a67dc5aee733bc581fd8f18110
https://doi.org/10.1364/ofs.2022.w4.32
https://doi.org/10.1364/ofs.2022.w4.32
Publikováno v:
27th International Conference on Optical Fiber Sensors.
We propose a method for localizing telecommunication facilities in OTDR waveform. The method measures the change in the Brillouin gain bandwidth caused by the cable bending, and the facility location is determined from the bending point.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcb22a8eb50f71fff95d70ebe5fd24ca
https://doi.org/10.1364/ofs.2022.w4.19
https://doi.org/10.1364/ofs.2022.w4.19
Publikováno v:
Journal of Lightwave Technology. 36:885-890
We propose a novel BOTDA that can measure a BFS change appearing on a time axis with a single-shot measurement by using a frequency-swept probe pulse. The proposed method employs a very simple laser control and detection system, without precise test
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce0878dab871f0affa079dfc54b1372c
https://doi.org/10.1109/jlt.2017.2759190
https://doi.org/10.1109/jlt.2017.2759190
Publikováno v:
Journal of Lightwave Technology. 35:2358-2365
We propose and demonstrate a novel scheme for the Brillouin-based loss monitoring of branch sections in passive optical networks. The proposed scheme with a linearly frequency-swept pump pulse can compensate for the variation in the Brillouin gain pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c171fd6f90db0dd8e908de72504869a
https://doi.org/10.1109/jlt.2017.2653221
https://doi.org/10.1109/jlt.2017.2653221
Publikováno v:
Journal of Lightwave Technology. 35:1738-1743
We propose a high-speed, dynamic strain measurement with random access based on real-time Brillouin time-domain analysis of correlated gain measured with an oscilloscope. A frequency-swept probe obtains the Lorentzian-shaped correlated gain in a time
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cad6aff1c4809748cb487e5945010d44
https://doi.org/10.1109/jlt.2017.2680458
https://doi.org/10.1109/jlt.2017.2680458
Publikováno v:
Journal of Lightwave Technology. 34:4454-4459
Loss distributions of branched fibers in field-installed and in-service passive optical networks are measured from a central office for the first time by using end-reflection-assisted Brillouin analysis. The statistical properties of branch lengths,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3a4d6890ae054fd3ac0558e73788a5b
https://doi.org/10.1109/jlt.2016.2531081
https://doi.org/10.1109/jlt.2016.2531081
Publikováno v:
Journal of Lightwave Technology. 33:4291-4296
We describe branched-fiber sensing with a novel Brillouin time-domain analysis configuration for temperature or strain sensing within a 2-D expanded area. By using a branch configuration with an appropriate number of branches and the newly proposed m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de1c0a36d73b6d261e4276efd782bbef
https://doi.org/10.1109/jlt.2015.2465953
https://doi.org/10.1109/jlt.2015.2465953
Publikováno v:
SPIE Proceedings.
We propose a novel BOTDA that can measure a BFS change appearing on a time axis with a single-shot measurement by using a frequency-swept probe pulse. The proposed method employs a very simple laser control and detection system, without precise test
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db601567913da078a3918680f458f905
https://doi.org/10.1117/12.2265528
https://doi.org/10.1117/12.2265528