The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Yasuhiro Koike - One of the best experts on this subject based on the ideXlab platform.
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optimum index Profile of the perfluorinated polymer based gi polymer optical fiber and its Dispersion properties
Journal of Lightwave Technology, 2000Co-Authors: Takaaki Ishigure, Yasuhiro Koike, J W FlemingAbstract:The significant advantages in bandwidth and low material Dispersion of perfluorinated (PF) polymer-based graded-index polymer optical fiber (GI POF) are theoretically and experimentally reported for the first time. It is confirmed that the low attenuation and low material Dispersion of the PF polymer enables 1 Gb/s km and 10 Gb/s km transmission at 0.85-/spl mu/m and 1.3-/spl mu/m wavelengths, respectively. The PF polymer-based CI POF has very low material Dispersion (0.0055 ns/nm/spl middot/km at 0.85 /spl mu/m), compared with those of the conventional PMMA-based POF and of multimode silica fiber (0.0084 ns/nm km at 0.85 /spl mu/m). Since the PF polymer-based GI POF has low attenuation from the visible to near infrared region, not only the 0.65-/spl mu/m wavelength which is in the low attenuation window of the PMMA-based GI POF, but other wavelengths such as 0.85-/spl mu/m or 1.3-/spl mu/m etc. can be adopted for the transmission wavelength. It is clarified in this paper that the wavelength dependence of the optimum index Profile shape of the PF polymer-based GI POF is very small, compared to the optimum index Profile shape of the silica-based multimode fiber. As a result, the PF polymer-based GI POF has greater tolerance in index Profile variation for higher speed transmission than multimode silica fiber. The impulse response function of the PF polymer-based GI POF was accurately analyzed from the measured refractive index Profile using a Wentzel, Kramers, Brillouin (WKB) numerical computation method. By considering all Dispersion factors involving the Profile Dispersion, predicted bandwidth characteristic of the PF polymer-based GI POF agreed well with that experimentally measured.
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formation of the refractive index Profile in the graded index polymer optical fiber for gigabit data transmission
Journal of Lightwave Technology, 1997Co-Authors: Takaaki Ishigure, M Satoh, O Takanashi, Eisuke Nihei, Shuntaro Yamazaki, Yasuhiro KoikeAbstract:Bandwidth characteristics of the large core graded index polymer optical fiber (GI-POF) are theoretically and experimentally clarified. The refractive index Profile of the GI-POF was controlled by interfacial-gel polymerization to investigate the relation between the index Profile and the bandwidth characteristics. It was experimentally confirmed that the maximum bandwidth of the poly methyl methacrylate (PMMA) base GI-POF is at most 3 GHz for 100 m transmission using a typical laser diode emitting at 650-nm wavelength (3 nm source spectral width) when its refractive index Profile is optimized. The maximum bandwidth theoretically estimated by considering both modal and material Dispersions is approximately 3 GHz which is exactly the same as the measured value, while higher than 10 GHz for 100 m was expected if only modal Dispersion was taken into account. The optimum refractive index Profile of the PMMA base GI-POF is theoretically and experimentally clarified by considering the Profile Dispersion further.
Takaaki Ishigure - One of the best experts on this subject based on the ideXlab platform.
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optimum index Profile of the perfluorinated polymer based gi polymer optical fiber and its Dispersion properties
Journal of Lightwave Technology, 2000Co-Authors: Takaaki Ishigure, Yasuhiro Koike, J W FlemingAbstract:The significant advantages in bandwidth and low material Dispersion of perfluorinated (PF) polymer-based graded-index polymer optical fiber (GI POF) are theoretically and experimentally reported for the first time. It is confirmed that the low attenuation and low material Dispersion of the PF polymer enables 1 Gb/s km and 10 Gb/s km transmission at 0.85-/spl mu/m and 1.3-/spl mu/m wavelengths, respectively. The PF polymer-based CI POF has very low material Dispersion (0.0055 ns/nm/spl middot/km at 0.85 /spl mu/m), compared with those of the conventional PMMA-based POF and of multimode silica fiber (0.0084 ns/nm km at 0.85 /spl mu/m). Since the PF polymer-based GI POF has low attenuation from the visible to near infrared region, not only the 0.65-/spl mu/m wavelength which is in the low attenuation window of the PMMA-based GI POF, but other wavelengths such as 0.85-/spl mu/m or 1.3-/spl mu/m etc. can be adopted for the transmission wavelength. It is clarified in this paper that the wavelength dependence of the optimum index Profile shape of the PF polymer-based GI POF is very small, compared to the optimum index Profile shape of the silica-based multimode fiber. As a result, the PF polymer-based GI POF has greater tolerance in index Profile variation for higher speed transmission than multimode silica fiber. The impulse response function of the PF polymer-based GI POF was accurately analyzed from the measured refractive index Profile using a Wentzel, Kramers, Brillouin (WKB) numerical computation method. By considering all Dispersion factors involving the Profile Dispersion, predicted bandwidth characteristic of the PF polymer-based GI POF agreed well with that experimentally measured.
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formation of the refractive index Profile in the graded index polymer optical fiber for gigabit data transmission
Journal of Lightwave Technology, 1997Co-Authors: Takaaki Ishigure, M Satoh, O Takanashi, Eisuke Nihei, Shuntaro Yamazaki, Yasuhiro KoikeAbstract:Bandwidth characteristics of the large core graded index polymer optical fiber (GI-POF) are theoretically and experimentally clarified. The refractive index Profile of the GI-POF was controlled by interfacial-gel polymerization to investigate the relation between the index Profile and the bandwidth characteristics. It was experimentally confirmed that the maximum bandwidth of the poly methyl methacrylate (PMMA) base GI-POF is at most 3 GHz for 100 m transmission using a typical laser diode emitting at 650-nm wavelength (3 nm source spectral width) when its refractive index Profile is optimized. The maximum bandwidth theoretically estimated by considering both modal and material Dispersions is approximately 3 GHz which is exactly the same as the measured value, while higher than 10 GHz for 100 m was expected if only modal Dispersion was taken into account. The optimum refractive index Profile of the PMMA base GI-POF is theoretically and experimentally clarified by considering the Profile Dispersion further.
Jesper Laegsgaard - One of the best experts on this subject based on the ideXlab platform.
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dispersive pulse compression in hollow core photonic bandgap fibers
Optics Express, 2008Co-Authors: Jesper Laegsgaard, Peter John RobertsAbstract:Compression of linearly chirped picosecond pulses in hollow-core photonic bandgap fibers is investigated numerically. The modal properties of the fibers are modeled using the finite-element technique, whereas nonlinear propagation is described by a generalized nonlinear Schrodinger equation, which accounts both for the composite nature of the nonlinearity and the strong mode Profile Dispersion. Power limits for compression with more than 90% of the pulse energy in the main peak of the compressed pulse are investigated as a function of fiber design, and the temporal and spectral widths of the input pulse. The validity of approximate scaling rules is investigated, and figures of merit for fiber design are discussed.
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mode Profile Dispersion in the generalised nonlinear schrodinger equation
Optics Express, 2007Co-Authors: Jesper LaegsgaardAbstract:The formulation of Schrodinger-like equations for nonlinear pulse propagation in a single-mode microstructured optical fiber with a strongly frequency-dependent guided-mode Profile is investigated. A correct account of mode Profile Dispersion in general necessiates a generalization of the effective area concept commonly used in the generalized nonlinear Schrodinger equation (GNLSE). A numerical scheme to this end is developed, and applied to a solid-core photonic bandgap fiber as a test case. It is further shown, that a simple reformulation of the GNLSE, expressed only in terms of the traditional frequency-dependent effective area, yields a good agreement with the more complete theory.
J W Fleming - One of the best experts on this subject based on the ideXlab platform.
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optimum index Profile of the perfluorinated polymer based gi polymer optical fiber and its Dispersion properties
Journal of Lightwave Technology, 2000Co-Authors: Takaaki Ishigure, Yasuhiro Koike, J W FlemingAbstract:The significant advantages in bandwidth and low material Dispersion of perfluorinated (PF) polymer-based graded-index polymer optical fiber (GI POF) are theoretically and experimentally reported for the first time. It is confirmed that the low attenuation and low material Dispersion of the PF polymer enables 1 Gb/s km and 10 Gb/s km transmission at 0.85-/spl mu/m and 1.3-/spl mu/m wavelengths, respectively. The PF polymer-based CI POF has very low material Dispersion (0.0055 ns/nm/spl middot/km at 0.85 /spl mu/m), compared with those of the conventional PMMA-based POF and of multimode silica fiber (0.0084 ns/nm km at 0.85 /spl mu/m). Since the PF polymer-based GI POF has low attenuation from the visible to near infrared region, not only the 0.65-/spl mu/m wavelength which is in the low attenuation window of the PMMA-based GI POF, but other wavelengths such as 0.85-/spl mu/m or 1.3-/spl mu/m etc. can be adopted for the transmission wavelength. It is clarified in this paper that the wavelength dependence of the optimum index Profile shape of the PF polymer-based GI POF is very small, compared to the optimum index Profile shape of the silica-based multimode fiber. As a result, the PF polymer-based GI POF has greater tolerance in index Profile variation for higher speed transmission than multimode silica fiber. The impulse response function of the PF polymer-based GI POF was accurately analyzed from the measured refractive index Profile using a Wentzel, Kramers, Brillouin (WKB) numerical computation method. By considering all Dispersion factors involving the Profile Dispersion, predicted bandwidth characteristic of the PF polymer-based GI POF agreed well with that experimentally measured.
M Satoh - One of the best experts on this subject based on the ideXlab platform.
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formation of the refractive index Profile in the graded index polymer optical fiber for gigabit data transmission
Journal of Lightwave Technology, 1997Co-Authors: Takaaki Ishigure, M Satoh, O Takanashi, Eisuke Nihei, Shuntaro Yamazaki, Yasuhiro KoikeAbstract:Bandwidth characteristics of the large core graded index polymer optical fiber (GI-POF) are theoretically and experimentally clarified. The refractive index Profile of the GI-POF was controlled by interfacial-gel polymerization to investigate the relation between the index Profile and the bandwidth characteristics. It was experimentally confirmed that the maximum bandwidth of the poly methyl methacrylate (PMMA) base GI-POF is at most 3 GHz for 100 m transmission using a typical laser diode emitting at 650-nm wavelength (3 nm source spectral width) when its refractive index Profile is optimized. The maximum bandwidth theoretically estimated by considering both modal and material Dispersions is approximately 3 GHz which is exactly the same as the measured value, while higher than 10 GHz for 100 m was expected if only modal Dispersion was taken into account. The optimum refractive index Profile of the PMMA base GI-POF is theoretically and experimentally clarified by considering the Profile Dispersion further.
