Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Masateru Tadakuma"'
Autor:
Masateru Tadakuma, Masanori Takahashi, Ryuichi Sugizaki, Takeshi Yagi, Misao Sakano, Yu Mimura, Jiro Hiroishi
Publikováno v:
Journal of Lightwave Technology. 25:2103-2107
Theoretical influences of reducing the cladding diameter for silica highly nonlinear fiber (HNLF) have been investigated by the finite-element method. Downsized HNLF with 56-mum cladding was fabricated, and certain reliability was confirmed through m
Autor:
Masanori Takahashi, Y. Taniguchi, Ryuichi Sugizaki, Masateru Tadakuma, Jiro Hiroishi, Takeshi Yagi
Publikováno v:
Journal of Lightwave Technology. 23:3615-3624
In recent technologies, various optical signal processing systems have been reported. In many of these applications, highly nonlinear fibers (HNLFs) are used as key parts. Especially, low loss and low dispersion slope are critical features of the HNL
Autor:
Ryuichi Sugizaki, Masateru Tadakuma, Shigehiro Takasaka, Yuki Taniguchi, Jiro Hiroishi, Masanori Takahashi
Publikováno v:
2014 The European Conference on Optical Communication (ECOC).
Autor:
Yukihiro Tsuchida, K. Doi, Ryuichi Sugizaki, Masateru Tadakuma, Hiroshi Matsuura, Koichi Maeda
Publikováno v:
2014 12th International Conference on Optical Internet 2014 (COIN).
We report some recent research activities of multicore EDFAs with cladding-pumped technology. We successfully developed cladding-pumped MC-EDFAs with C-band L-band application, respectively. Cladding-pumped L-band MC-EDFA realized output power of 19
Autor:
Itsuro Morita, H. Ogoshi, Kohei Doi, Hiroshi Matsuura, Ryuichi Sugizaki, Shigehiro Takasaka, Koichi Maeda, Masateru Tadakuma, Takehiro Tsuritani, Yukihiro Tsuchida, Kengo Watanabe, Tsunetoshi Saito, Koki Takeshima
Publikováno v:
2014 IEEE Photonics Society Summer Topical Meeting Series.
Seven-core MC-EDFA pumped with single MM-LD optimized for L-band is developed. Output power of 19 dBm for each core is realized between 1576-1603nm with 33% reduced power consumption.
Autor:
Benjamin J. Puttnam, Jun Sakaguchi, Yoshinari Awaji, R. V. Jensen, Naoya Wada, Koichi Maeda, Yukihiro Tsuchida, Yusaku Tottori, Masateru Tadakuma, Katsunori Imamura, Masayuki Watanabe, Tetsuya Kobayashi, Ryuichi Sugizaki, Jose Manuel Delgado Mendinueta, Werner Klaus
Publikováno v:
Optics express. 22(1)
We report the development of a space division multiplexed (SDM) transmission system consisting of a 19-core fiber and 19-core Erbium-doped fiber amplifier (EDFA). A new 19-core fiber with an improved core arrangement was employed to achieve a low agg
Publikováno v:
OFC
Amplification characteristics of double-clad multicore EDFA are reviewed. Cladding-pumping configuration, which has possibilities for reducing power consumption and downsizing, is demonstrated.
Autor:
Yuki Taniguchi, Shigehiro Takasaka, Ryuichi Sugizaki, Jiro Hiroshi, Kohei Doi, Masateru Tadakuma, Hiroshi Matsuura, Masanori Takahashi
Publikováno v:
OFC
Fabricated dispersion stable HNLFs enable a quasi phase-matched FOPA with only 2-stage configuration to have flat gain more than 22 dB with bandwidth of 50 nm. NF is less than 4.4 dB in C-band.
Autor:
David J. Richardson, J. Hiroishi, Periklis Petropoulos, Masanori Takahashi, Francesca Parmigiani, Masateru Tadakuma, Kazunori Mukasa, Lionel Provost
Publikováno v:
IEEE Photonics Technology Letters. 20:1676-1678
We demonstrate a four-channel extension to the Mamyshev regenerator and investigate its potential for the simultaneous processing of 4 times 10 Gb/s return-to-zero wavelength division-multiplexed channels. Mitigation of the interchannel nonlinearitie
Autor:
Kengo Watanabe, Masateru Tadakuma, Itsuro Morita, Koichi Maeda, Ryuichi Sugizaki, Hidenori Takahashi, Masatoshi Suzuki, Yukihiro Tsuchida, Tsunetoshi Saito, Seiya Sumita, Koki Takeshima, Katsunori Imamura, Koji Igarashi, Takehiro Tsuritani
Publikováno v:
Optics express. 21(15)
We confirm the feasibility of 100-Tbit/s-class trans-oceanic SDM transmission. Using seven-core fiber spans with seven-core full C-band EDFAs, 7 × 264-channel quasi-Nyquist-WDM 60-Gbit/s PDM-QPSK signals are transmitted over 6,370 km.