Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Koji Omichi"'
Publikováno v:
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X.
We have demonstrated high-precision cutting and drilling of CFRP using a 3-kW CW single-mode fiber laser and a galvanometer scanner. A 3-mm-thick thermoset CFRP was successfully cut with 100 scans at the scanning speed of 13 m/s, which corresponds to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dff182479ac89a813bb4a091db951530
https://doi.org/10.1117/12.2578074
https://doi.org/10.1117/12.2578074
Publikováno v:
26th International Conference on Optical Fiber Sensors.
We design silicon photonics based system-on-chip multi-gas sensor and experimentally demonstrate the temperature insensitive CO2 gas sensing. In the preliminary measurement results, we observe a sensitivity of ~500 ppm based on the optical L-band wav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::805029f36933cb91a87508f0782aca78
https://doi.org/10.1364/ofs.2018.the46
https://doi.org/10.1364/ofs.2018.the46
Autor:
Takahiro Kodama, Naoya Wada, Koji Omichi, Ken-ichi Kitayama, Satoshi Shimizu, Ryosuke Matsumoto, Ryujiro Nomura
Publikováno v:
Journal of Lightwave Technology. 32:1132-1143
In the hybrid optical code division multiple access (OCDMA) architectures using different types of optical encoder/decoder (E/Ds) between an optical line terminal and optical network units, a hybrid 40G-OCDMA-PON with a single multi-port and super-st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4a97b0d60fa4b0110e0bc3b7e609ee3
https://doi.org/10.1109/jlt.2014.2299070
https://doi.org/10.1109/jlt.2014.2299070
Autor:
Kunimasa Saitoh, Takeshi Fujisawa, Hiroki Ishihara, Yusuke Sasaki, Koji Omichi, Hitoshi Uemura
Publikováno v:
Asia Pacific Optical Sensors Conference.
Preliminary fiber Bragg grating inscription to 2LP-mode 4-core fiber is demonstrated to confirm feasibility for optical fiber sensing application. Clear Bragg reflection spectra for LP01 and LP11 are obtained individually using all fiber-optic few-mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7016653e99701a5c55798e9ad98bc5a5
https://doi.org/10.1364/apos.2016.th4a.13
https://doi.org/10.1364/apos.2016.th4a.13
Autor:
Shoko Nishimoto, Takui Uematsu, Kunimasa Saitoh, Shoichiro Matsuo, Koji Omichi, Hitoshi Uemura, Yusuke Sasaki, Katsuhiro Takenaga, Ryuichiro Goto
Publikováno v:
SPIE Proceedings.
A multicore fiber (MCF)-based mode multiplexer/demultiplexer (MUX/DEMUX) that can overcome the alignment issue of the fiber-based mode MUX/DEMUX is proposed. Design concept and fabrication results of the MCF-based mode MUX/DEMUX for two-spatial-mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0ecdea257e24894f69705e5e12ea9b1
https://doi.org/10.1117/12.2079061
https://doi.org/10.1117/12.2079061
Autor:
Koji Omichi
Publikováno v:
The Review of Laser Engineering. 45:5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dd2f80f2e8ee5b9f999f3ef196bf389
https://doi.org/10.2184/lsj.45.1_5
https://doi.org/10.2184/lsj.45.1_5
Autor:
Shoko Nishimoto, Shoichiro Matsuo, K. Takenaga, Kunimasa Saitoh, Takui Uematsu, Ryuichiro Goto, Koji Omichi, Hitoshi Uemura, Yusuke Sasaki
Publikováno v:
2014 The European Conference on Optical Communication (ECOC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b66514a1f53f4c75c9c7d8d1478eff2
https://doi.org/10.1109/ecoc.2014.6963977
https://doi.org/10.1109/ecoc.2014.6963977
Autor:
Ryuichiro Goto, Ryozo Yamauchi, Shoichiro Matsuo, Kenji Sasaki, Koji Omichi, Hitoshi Uemura, Katsuhiro Takenaga, Kunimasa Saitoh
Publikováno v:
SPIE Proceedings.
Multi-core to 7 single-core-fibers fan-out device with multi-core fiber pigtail connector is demonstrated to apply various types of multi-core fiber based sensor. Fused taper type fan-out device and SC type multi-core fiber connector are separately f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7dd3bbc39fbb276a34d77dc93bb7b3e
https://doi.org/10.1117/12.2059556
https://doi.org/10.1117/12.2059556
Autor:
Koji Omichi, Naoya Wada, Takahiro Kodama, Ryosuke Matsumoto, Ken-ichi Kitayama, Ryujiro Nomura, Satoshi Shimizu
Publikováno v:
2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching.
We will present a special class of apodized SSFBG encoder/decoder which generates multi-level PSK code for 40G-OCDMA-PON. Our proposed apodization profile has improved the variability of BER performance that depends on each optical code patterns.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78a00fb97b7511443f0bf82ffdc1f441
https://doi.org/10.1364/oecc_ps.2013.mp1_6
https://doi.org/10.1364/oecc_ps.2013.mp1_6
Autor:
Ryosuke Matsumoto, T. Kodama, Satoshi Shimizu, Ryujiro Nomura, Koji Omichi, Ken-ichi Kitayama, Naoya Wada
Publikováno v:
OFC/NFOEC
Cost-effective, asynchronous 4 × 40Gbps full-duplex DPSK-OCDMA PON using 8-level phase-shifted, 320 Gchip/s apodized SSFBG en/decoders at each ONU and a single multi-port en/decoder at OLT is experimentally demonstrated for the first time.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cab6cefa54c74ed6e8bdf8847822c143
https://doi.org/10.1364/ofc.2013.ow4d.7
https://doi.org/10.1364/ofc.2013.ow4d.7