Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ken Ashizawa"'
Autor:
Takuya Okimoto, Hideki Yagi, Ken Ashizawa, Kouichiro Yamazaki, Koji Ebihara, Satoru Okamoto, Kazuhiko Horino, Munetaka Kurokawa, Yoshiyuki Sugimoto, Seiji Kumagai, null Tanaka, Masaru Takechi, Mitsuru Ekawa, Yoshihiro Yoneda
Publikováno v:
2023 Optical Fiber Communications Conference and Exhibition (OFC).
An InP-based coherent receiver PIC with waveguide PDs demonstrates 80-GHz bandwidth and high responsivity of 0.156 A/W at a wavelength of 1.55 µm. A coherent receiver module with PICs and TIAs performs sufficient characteristics for 128-GBaud transm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf90d2a6004eec52dc4e2be7baf3439c
https://doi.org/10.23919/ofc49934.2023.10117325
https://doi.org/10.23919/ofc49934.2023.10117325
Autor:
Takuya Okimoto, Ken Ashizawa, Hiroki Mori, Koji Ebihara, Kouichiro Yamazaki, Satoru Okamoto, Kazuhiko Horino, Yusuke Ohkura, Hideki Yagi, Mitsuru Ekawa, Yoshihiro Yoneda
Publikováno v:
Optical Fiber Communication Conference (OFC) 2022.
A waveguide AlInAs/GaInAs APD with the butt-joint coupling structure for 106-Gb/s PAM4 applications is demonstrated for the first time. A maximum 3-dB bandwidth of 38 GHz and high responsivity at unity gain of 0.90 A/W are exhibited at 1.55 μm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8e27b3e0c3e20b2be438be918347f09
https://doi.org/10.1364/ofc.2022.w3d.2
https://doi.org/10.1364/ofc.2022.w3d.2
Autor:
Satoru Okamoto, Yoshihiro Yoneda, Kouichiro Yamazaki, Takuya Okimoto, Kazuhiko Horino, Yusuke Ohkura, Hideki Yagi, Ken Ashizawa, Mitsuru Ekawa, Koji Ebihara
Publikováno v:
OFC
InP-based PICs with waveguide p-i-n PDs for 100 GBaud coherent receivers are demonstrated. The wide 3-dB bandwidth of more than 65 GHz and high responsivity of 0.154 A/W are revealed at a wavelength of 1.55 μm. We successfully achieve the monolithic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49f512bc7725cb1afc394cb4ade8c8fd
https://doi.org/10.1364/ofc.2021.f2c.6
https://doi.org/10.1364/ofc.2021.f2c.6
Autor:
Kazuhiko Horino, Hideki Yagi, Yoshihiro Yoneda, Koji Ebihara, Tatsuya Takeuchi, T. Uchida, Takuya Okimoto, Takumi Endo, Satoru Okamoto, Ken Ashizawa
Publikováno v:
OFC
InP-based 8-channel waveguide APD arrays were demonstrated towards 400 GbE for the first time. They exhibited maximum 3-dB bandwidth of 23 GHz under high-optical input of −10 dBm and uniformity of avalanche breakdown voltage less than 0.1 V between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a3c0548b1497f6c8e4d15a733009ecf
https://doi.org/10.1364/ofc.2020.th3c.2
https://doi.org/10.1364/ofc.2020.th3c.2
Publikováno v:
Japanese Journal of Oral & Maxillofacial Surgery. 50:392-395
Mucoepidermoid carcinoma is a salivary gland neoplasm characterized by the coexistence of epidermoid cells, mucussecreting cells, and intermediate cells. Among the minor salivary glands, this carcinoma commonly arises in the palatal glands. In the pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f5a5c4a0abf7e5dc5d25e43e6e5ca1d
https://doi.org/10.5794/jjoms.50.392
https://doi.org/10.5794/jjoms.50.392
Publikováno v:
Physica C: Superconductivity. 362:180-185
We have designed a new liquid phase epitaxial (LPE) technique, infrared heated LPE (IR-LPE) technique, using no crucible to avoid a contamination from it. La 2− x Sr x CuO 4 single-crystalline films were grown on the a tetra -axis-orientated bulk s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d4deb68439b710eaac9dc0d6defc8a2
https://doi.org/10.1016/s0921-4534(01)00667-0
https://doi.org/10.1016/s0921-4534(01)00667-0
Autor:
Jun Shimada, Ken Ashizawa
Publikováno v:
Japanese Journal of Oral & Maxillofacial Surgery. 39:684-695
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6e6aaef064062ce5ae483334388c0cf
https://doi.org/10.5794/jjoms.39.684
https://doi.org/10.5794/jjoms.39.684
Publikováno v:
Advances in Superconductivity XII ISBN: 9784431702702
Surface of La2CuO4 single crystals were oxidized by KMnO4 aqueous solutions. The oxidation conditions such as KMnO4 concentration, soaking time and solution temperature of KMnO4, were systematically controlled. The magnetic properties of the crystals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::617f1dbe8922ab83284194246f8c77ed
https://doi.org/10.1007/978-4-431-66877-0_34
https://doi.org/10.1007/978-4-431-66877-0_34
Autor:
Nobuo Sakuragawa, Shoji Shinoda, Chikara Sakai, Minoru Okuma, Masuhiro Takahashi, Masakazu Ito, Tadashi Koike, Toshio Ihzumi, Akira Shibata, Akira Hattori, Isao Kobayashi, Ken Ashizawa, Masayoshi Sanada, Keiko Hoshino
Publikováno v:
Blood & Vessel. 10:489-494
Spontaneous platelet aggregation (SPA) in primary thrombocythaemia was examined using Bryston aggregometer by stirring at 37°C for 10min. of citrated original PRP (platelet count 87-296×104/μl) or diluted PRP (3×105/μl). SPA was found in 7 out o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b70f7a191957275ed2f8f16389d222d
https://doi.org/10.2491/jjsth1970.10.489
https://doi.org/10.2491/jjsth1970.10.489
Autor:
Hiroshi Takeshima, Hosaku Sumida, Ken Ashizawa, Yoshifumi Tazima, Yasuhiko Hiranuma, Yoshiro Yamamoto, Nobuo Utsumi, Mitsuyoshi Eba, T Shimazaki
Publikováno v:
Japanese Journal of Oral & Maxillofacial Surgery. 33:437-441
Verruciform Xanthoma with histopathological characteristics of verruciform growth and the proliferation of xanthoma cell in the lamina propria was first described in 1971 by Shafer as Histiocytosis-Y. Though occasionally reported later in occidental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cf930c42d942aca2cd98edd4491a4db
https://doi.org/10.5794/jjoms.33.437
https://doi.org/10.5794/jjoms.33.437