Thermal stability of high bandwidth GI POF

Satô, Masataka; Hirai, M.; Ishigure, Takaaki; Koike, Yasuhiro

doi:10.1364/otf.1999.sac3

Cited by 2 publications

(3 citation statements)

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“…In order to develop a GI POF having high thermal stability, we focused on a Tg decrease depending on the kinds and concentration of dopant. It was experimentally confirmed that the refractive index profile of the PMMA based GI POF was maintained for more than 5000 h at 85 C [4], [5] by selecting a suitable dopant which can maintain the high Tg of PMMA even after doping. In this paper, not only the thermal stability of the refractive index profile but also the attenuation stability under high temperature and high humidity atmosphere was investigated.…”

Section: Introductionmentioning

confidence: 85%

“…Since the angular independence of Vv indicated the random orientation, Debye's theory [10] written as (5) may be adopted (5) where (6) and 7Here, denotes the mean-square average of the fluctuations of all dielectric constants, is the wavelength of light in vacuum and is the refractive index of the sample. refers to the correlation function defined by (8) where and are the fluctuations of the dielectric constant at and positions that are a distance apart.…”

Section: Hv (1)mentioning

confidence: 99%

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Graded-index polymer optical fiber with high temperature and high humidity stability

Ishigure

Satô

Kondô

et al. 2002

J. Lightwave Technol.

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It was clarified for the first time that the slight attenuation increment observed in the previous poly methyl methacrylate (PMMA)-dopant system graded-index polymer optical fiber (GI POF) we reported originated in the excess scattering loss induced by the aggregation of absorbed water into the POF. Although the PMMA material generally absorbs two weight% of water at maximum, the low attenuation of the conventional step-index (SI) POF whose core material is PMMA can be maintained at 70 C, 80% relative humidity (RH) atmosphere because the absorbed water might be homogeneously dispersed without any aggregation in the core of POF. On the other hand, addition of dopant material having higher refractive index than that of PMMA is required to form the refractive index distribution in the GI POF, which decreases the amount of water absorption into polymer, because the dopant material is more hydrophobic than PMMA. Therefore, in spite of the small amount of absorbed water such as 0.5 wt.%, the absorbed water molecules can not be uniformly dispersed but must be aggregated to form heterogeneities in the refractive index of the polymer matrix. It was clarified that a dopant material that is as hydrophilic as PMMA was required to maintain the attenuation of the PMMA-dopant system GI POF under high temperature and high humidity atmosphere, and such a suitable dopant system GI POF was proposed.

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Section: Introductionmentioning

confidence: 85%

Section: Hv (1)mentioning

confidence: 99%

Graded-index polymer optical fiber with high temperature and high humidity stability

Ishigure

Satô

Kondô

et al. 2002

J. Lightwave Technol.

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“…Although SI POFs with high thermal stability were successfully fabricated with these materials, difficulty in preparing GI POF will confine their application. Recently, a method was proposed to improve the thermal stability of GI POF by selecting suitable dopant material and decreasing the dopant concentration;7–9 however, the vital problem of low thermal stability of matrix could not be solved in this way. To date, there has been no satisfactory method to fabricate a heat‐resistant GI POF.…”

Section: Introductionmentioning

confidence: 99%

Preparation of heat‐resistant gradient‐index polymer optical fiber rods based on poly(N‐isopropylmaleimide‐co‐methyl methacrylate)

Wang

Chen

et al. 2002

J of Applied Polymer Sci

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Using the interfacial gel polymerization method, a heat-resistant gradient-index polymer optical fiber (GI POF) was developed based on the copolymer of methyl methacrylate (MMA) and N-isopropylmaleimide (IPMI) as the matrix material and bromobenzene (BB) as dopant. The gradient distribution of IPMI in the GI POF rod was determined by element analysis. IPMI had great advantage in improving glass transition temperature (T g ) and forming a gradient-index profile. There was a significant enhancement in the heat-resistant property in comparison with a conventional GI POF rod. The combination of high thermal stability and easy fabrication makes the novel BB-IPMI-MMA system very suitable for heat-resistant GI POF.

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Thermal stability of high bandwidth GI POF

Cited by 2 publications

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Graded-index polymer optical fiber with high temperature and high humidity stability

Graded-index polymer optical fiber with high temperature and high humidity stability

Preparation of heat‐resistant gradient‐index polymer optical fiber rods based on poly(N‐isopropylmaleimide‐co‐methyl methacrylate)

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