2.5 Gbit/s 100 m data transmission using graded-index polymer optical fibre and high-speed laser diode at 650 nm wavelength

Ishigure, Takaaki; Nihei, Eisuke; Yamazaki, S.; Kobayashi, K.; Koike, Yasuhiro

doi:10.1049/el:19950307

Cited by 30 publications

(10 citation statements)

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“…Because of this, it has been thought that POF cannot be utilized for high speed transmission medium. Recently, however, we proposed a large core, low loss, and high bandwidth graded-index polymer optical fiber (GI POF) (1,2) for the first time and we confirmed that 2.5 Gb/s signal transmission for 100 m distance was possible in the GI POF (2,3).…”

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confidence: 68%

Optimization of Modal and Material Dispersions in High-Bandwidth Graded-Index Polymer Optical Fibers

Nihei

Ishigure

Koike

1997

ACS Symposium Series

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The optimum refractive-index distribution of the high bandwidth graded-index polymer optical fiber (GI POF) was clarified by consideration of both modal and material dispersions. The ultimate bandwidth achieved by the POF is investigated by a quantitative estimation of the material dispersion as well as the modal dispersion. The results indicated that even if the refractive-index distribution is tightly controlled, the bandwidth of the poly (methyl methacrylate) (PMMA)-base GI POF was dominated by the material dispersion when the required bit rate becomes larger than 4 Gb/s for 100-m transmission. It was also confirmed that the material dispersion strongly depends on the matrix polymer and that the fluorinated polymer whose material dispersion (-0.078 ns/nm•km) is lower than that of poly methyl methacrylate (-0.305 ns/nm•km) allows for a 10 Gb/s transmission rate in 100 m link.Recent developments in optical fiber technology brings new life to the prospect of optical telecommunications and has triggered broad efforts to develop the science and technology essential to realize new communication concepts such as information super highway.Single mode glass fiber is widely used in the trunk area of the telecommunication system and the optical fiber system is expected to extend to the subscriber area and the network in building, offices, and homes. However, use of the single mode glass fiber system in short distance network is not necessarily suitable because it requires the precise handling and connection due to the small core size (5-10 μιη) and thus it would be expensive in broadband residential area network, ATM-LAN, interconnection, etc. In contrast, polymer optical fiber (POF) which has more than 500 pm of core is promising candidate to solve such problems. 58

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confidence: 68%

Optimization of Modal and Material Dispersions in High-Bandwidth Graded-Index Polymer Optical Fibers

Nihei

Ishigure

Koike

1997

ACS Symposium Series

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“…28, No. 3,1996 source with more than 2-nm spectral width, the effect of the material dispersion should be taken into account and the refractive-index profile must be accurately controlled to have a limited value of the index exponent a (from 1.7 to 3) in the power law approximation. The fluorinated polymer based GI POF can transmit a higher bit rate than PMMA based Gl POF because fluorinated polymer has low material dispersion and low attenuation at near infrared region.…”

Section: Resultsmentioning

confidence: 99%

“…To calculate the second derivative of the refractiveindex by the wavelength in eq 1, the refractive-indices of the polymer at several wavelengths from 400 nm to 1000 nm were measured by an Abbe's refractometer, and these measured points were fitted to the three term Sellmeier equation 3 as shown in eq 2.…”

Section: Materials Dispersionmentioning

confidence: 99%

“…3 Since the quadratic refractive-index distribution in the GI POF decreases the modal dispersion, we investigated the control of the refractive-index profile of GI POF by the interfacial-gel polymerization technique. 1 • 2 In order to analyze the ultimate bandwidth characteristics of the GI POF, the optimum refractive index profile is clarified in this paper in which not only modal dispersion but also the material dispersion are taken into account for the first time.…”

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confidence: 99%

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Optimization of the Refractive-Index Distribution of High-Bandwidth GI Polymer Optical Fiber Based on Both Modal and Material Dispersions

Ishigure

Nihei

Koike

1996

Polym J

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ABSTRACT:The optimum refractive-index distribution of the high bandwidth graded-index polymer optical fiber (GI POF) in which material dispersion is taken into account was clarified for the first time. Since modal dispersion remarkably decreases by GI POF, this paper focuses on the ultimate bandwidth achieved by POF, quantitatively estimating the material dispersion as well as modal dispersion. The results indicated that the bandwidth of the poly(methyl methacrylate) (PMMA) based GI POF was dominated by material dispersion when the required data rate becomes larger than a few Gb s-1 • It was also confirmed that material dispersion strongly depends on the matrix polymer and that use of fluorinated polymer whose material dispersion (-0.078 nsnm-1 km-1 ) is lower than that ofPMMA (-0.305nsnm-1 km-1 ) allows for a lOGbs-1 signal transmission.KEY WORDS Polymer Optical Fiber I Graded-Index

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“…1 -5 Reported results for potential applications of GI polymer optical fiber are ample in the literature. These include, for example, a high bandwidth GI polymer optical fiber, 6 GI polymer optical fiber amplifier with a high gain in the visible region, 7 and GI polymer lens used in fax machines. 8 • 9 It is known that the bandwidth can be maximized if the radial distribution of the refractive index (RJ) of an optical fiber is parabolic.…”

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Gradient-Index Polymer Optical Fiber Preparation through a Co-Extrusion Process

Liu

Hsieh

Chen

et al. 1999

Polym J

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ABSTRACT:The preparation of gradient index polymer optical fiber through a co-extrusion process is analyzed theoretically. The effects of the essential parameters of the system under consideration on the radial distribution of the refractive index (R/) of the optical fiber are examined through numerical simulation. These include the ratio (volume of inner layer/volume of outer layer), the diffusivity and the initial concentration of monomer, the length of diffusion zone, and the mass transfer coefficient of monomer at the outer boundary of the outer layer. We show that these parameters can play a significant role in the design of a co-extrusion process. If they are chosen appropriately, about 80% of an optical fiber can have an approximate parabolic Rl distribution in its radial direction.KEY WORDS Co-Extrusion Process / Optical Fiber Preparation / Mathematical Modeling/ Gradient-index (GI) polymer is one of the most popular materials for optical fiber communication and imaging. 1 -5 Reported results for potential applications of GI polymer optical fiber are ample in the literature. These include, for example, a high bandwidth GI polymer optical fiber, 6 GI polymer optical fiber amplifier with a high gain in the visible region, 7 and GI polymer lens used in fax machines. 8 • 9 It is known that the bandwidth can be maximized if the radial distribution of the refractive index (RJ) of an optical fiber is parabolic. 10 Several efforts have been made to achieve this idealized condition. Perry and Witcher, 11 for instance, proposed a multiple layer co-extrusion process, which is capable of yielding a near parabolic RI distribution. Similar idea was also adopted by other researchers. 9 · 12 -14 Yamamoto et a/., 8 Mishina et a/., 15 · 16 and Mishina et a/., 17 were able to design an extrusion process, which comprises an internal diffusion and surface evaporation operation. Another possible approach is the closed co-extrusion process developed by Ho et al.,12 Chen et a!., 13 and Chen, et a/. 14 It was shown experimentally that this process has the advantage of high reproducibility and high production rate. The mathematical analysis on the closed co-extrusion process was presented recently by Liu et a/. 18 in which the effects of the nature of the reactant mixtures and the operating conditions such as different volume ratios of (inner layer/outer layer), extrusion velocity, and diffusion length on the radial distribution of RI were discussed. It was shown that the radial distribution of RIcan be affected appreciably by these factors. However, achieving an exact parabolic RI distribution for the entire cross section of an optical fiber is impossible. This is because that the outer boundary of the co-extrusion apparatus is impermeable to the diffusing monomers, and the radial distribution of RI becomes flat near the outer boundary of the extruded fiber.In the present study, the analysis of Liu et a/. 18 is extended to the case where a more general condition on the outer boundary of the co-extrusion apparatus is assumed...

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2.5 Gbit/s 100 m data transmission using graded-index polymer optical fibre and high-speed laser diode at 650 nm wavelength

Cited by 30 publications

References 1 publication

Optimization of Modal and Material Dispersions in High-Bandwidth Graded-Index Polymer Optical Fibers

Optimization of Modal and Material Dispersions in High-Bandwidth Graded-Index Polymer Optical Fibers

Optimization of the Refractive-Index Distribution of High-Bandwidth GI Polymer Optical Fiber Based on Both Modal and Material Dispersions

Gradient-Index Polymer Optical Fiber Preparation through a Co-Extrusion Process

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