T Sasaki

Publications (9)3.75 Total impact

• Conference Proceeding: Microbending-induced crosstalk increase in heterogeneous multi-core fiber

  T. Hayashi, T. Sasaki, E. Sasaoka
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  ABSTRACT: Inter-core crosstalk of a heterogeneous multi-core fiber was experimentally observed to increase more than 10 dB by applying microbending to the fiber. The increase was described theoretically based on bending-radius dependence of the crosstalk.
  Optical Communication (ECOC), 2011 37th European Conference and Exhibition on; 10/2011
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  Conference Proceeding: Coherent 1200-km 6×6 MIMO mode-multiplexed transmission over 3-core microstructured fiber

  R. Ryf, A. Sierra, R.-J. Essiambre, A.H. Gnauck, S. Randel, M. Esmaeelpour, S. Mumtaz, P.J. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, T. Hayashi, T. Taru, T. Sasaki
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  ABSTRACT: We experimentally demonstrate transmission of 6 mode-multiplexed 20-Gbd-QPSK signals over 1200 km of three-core microstructured fiber (3C-MSF). An aggregate single-wavelength capacity of 240 Gbit/s is recovered by off-line 6×6 coherent multiple-input multiple-output (MIMO) digital signal processing.
  Optical Communication (ECOC), 2011 37th European Conference and Exhibition on; 10/2011
• Conference Proceeding: Tough ultra bend-insensitive fiber having compressive residual stress at surface of pure-silica cladding

  T. Nakanishi, M. Hirano, M. Inai, T. Sasaki, T. Hattori
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  ABSTRACT: UBIF having compressive residual stress at cladding surface without additional layer is newly developed, which realizes both 13 times longer lifetime at 1.3mm-radius bending and 100 times lower 25-years failure probability at 5mm-radius bending compared with those of conventional UBIF.
  Optical Communication (ECOC), 2010 36th European Conference and Exhibition on; 10/2010
• Conference Proceeding: Bend-insensitive and effectively single-moded all-solid photonic bandgap fibers with heterostructured cladding

  T. Murao, K. Saitoh, T. Taru, T. Nagashima, K. Maeda, T. Sasaki, M. Koshiba
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  ABSTRACT: We propose a novel concept of cladding structure in all-solid photonic bandgap fibers. It promises low bending and confinement losses with single-mode operation. The mechanism is based on the new concept of heterostructured cladding.
  Optical Communication, 2009. ECOC '09. 35th European Conference on; 10/2009
• Conference Proceeding: Straightforward chromatic dispersion measurement based on phase mismatching FWM

  M. Hirano, T. Sasaki
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  ABSTRACT: Novel chromatic dispersion measurement is demonstrated with simple setup based on phase mismatching four-wave-mixing. According to high accuracy of measured dispersion spectra, zero-dispersion wavelength and higher order dispersion parameters of HNLF can be determined.
  Optical Communication, 2009. ECOC '09. 35th European Conference on; 10/2009
• Conference Proceeding: Novel dispersion compensating fiber with fluorine-doped cladding for simultaneous realization of high dispersion compensation efficiency and low attenuation

  T. Sasaki, K. Makihara, M. Hirano, T. Haruna, T. Kashiwada, S. Hagihara, M. Onishi
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  ABSTRACT: Fluorine-doped cladding with a Delta^- of -0.2% was employed for the dispersion compensation fiber with triple-cladding structure, which successfully realized the dispersion less than -300 ps/km/nm while keeping a figure of merit higher than 350 ps/nm/dB
  Optical Fiber Communication Conference, 2006 and the 2006 National Fiber Optic Engineers Conference. OFC 2006; 04/2006
• Article: Low-loss pure-silica-core fibers and their possible impact on transmission systems

  Y. Chigusa, Y Yamamoto, T. Yokokawa, T Sasaki, T. Taru, M Hirano, M. Kakui, M. Onishi, E. Sasaoka
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  ABSTRACT: Low-loss optical fibers are now indispensable transmission media for transmission systems. Recently, the ultralow-loss performance for long transmission systems, the water-loss-free performance for wide-band wavelength-division-multiplexing (WDM) systems, the hydrogen-loss-insensitive performance for system reliability, and the bending-loss-insensitive performance for access or indoor applications have attracted much interest. In this regard, pure-silica-core fibers (PSCFs) are suitable, and unprecedented low-loss PSCFs have been successfully fabricated. This paper introduces the recent progress of low-loss PSCFs and their possible impact on transmission systems.
  Journal of Lightwave Technology 12/2005; 23(11):3541- 3550. · 2.78 Impact Factor
• Conference Proceeding: In-line dispersion compensation free WDM transmission with low-slope non-zero dispersion-shifted fibre for introduction of 40-Gbit/s

  M Tanaka, K. Makihara, K. Sohma, K Matsushita, T Okuno, T Sasaki, E. Sasaoka, M. Onishi
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  ABSTRACT: A transmission line with 240 km of low-slope non-zero dispersion-shifted fibre is proved to enable cost effective upgrade from a completely dispersion compensation free 10-Gbit/s WDM system to an in-line dispersion compensation free 40-Gbit/s WDM system.
  Optical Communication, 2005. ECOC 2005. 31st European Conference on; 10/2005
• Article: Water-free pure-silica-core fibre and its stability against hydrogen ageing

  Y. Yamamoto, T. Sasaki, T. Taru, M. Hirano, S. Ishikawa, M. Onishi, E. Sasaoka, Y. Chigusa
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  ABSTRACT: Water-free pure-silica-core fibre has been developed for the first time. It exhibits ultra-low loss of 0.247 dB/km at 1383 nm and 0.170 dB/km at 1550 nm, representing the lowest-loss G.652D fibre. Excellent durability against hydrogen ageing owing to pure-silica-core has also been verified.
  Electronics Letters 11/2004; · 0.96 Impact Factor