Excess loss of single-mode jacketed optical fiber at low temperature

Yabuta, Tetsuro; Yoshizawa, Noriko; Ishihara, K.

doi:10.1364/ao.22.002356

Cited by 41 publications

(16 citation statements)

References 2 publications

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“…Some recommendations for the selection of the thicknesses and material characteristics a r e presented. The numerical examples a r e executed for silicone/ nylon coated systems, which were studied experimentally by Katsumally induced microbending in dual-coated optical fibers, with an em- , [14]. The theoretical prediction agrees well with the experimental observations.…”

Section: Effect Of Initial Curvature On Low Temperaturesupporting

confidence: 55%

“…The numerical examples are executed for silicone/nylon coating systems, studied by Katsuyama et al [lo], and Yabuta et al [14], and discussed by Lenahan [15]. The spring constant K was evaluated by the Vangheluwe formula [17], which for the case in question, when the Poisson ratio of the primary coating material is close to 0.5, can be simplified as follows:…”

Section: Numerical Examplesmentioning

confidence: 99%

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Effect of initial curvature on low temperature microbending in optical fibers

Suhir

1988

J. Lightwave Technol.

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Abstmct-The study contains a n analytical evaluation of the therphasis on the effect of the initial local curvatures. Our analysis has shown that these curvatures could cause appreciable additional deflections of the glass fiber even at moderately low temperatures, thereby resulting in added transmission losses. The developed formulas a r e simple, easy-to-use, and clearly indicate the role of various factors affecting the prebuckling behavior of the fiber. They also indicate what could be done to bring down, if necessary, the temperature induced curvatures and the resulting added transmission losses. Some recommendations for the selection of the thicknesses and material characteristics a r e presented. The numerical examples a r e executed for silicone/ nylon coated systems, which were studied experimentally by Katsumally induced microbending in dual-coated optical fibers, with an em-FIBER PRIMARY COATING SECONDARY COATING Fig. 1. EO = f o + &TO, € 1 = f i -XI(TO -T I ) , (1) yama and Yabuta [lo], [14]. The theoretical prediction agrees well with the experimental observations.€ 2 = f2 -X2T2

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Section: Effect Of Initial Curvature On Low Temperaturesupporting

confidence: 55%

Section: Numerical Examplesmentioning

confidence: 99%

Effect of initial curvature on low temperature microbending in optical fibers

Suhir

1988

J. Lightwave Technol.

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“…In the silicone/nylon coatings of Yabuta et al, 6 thicker primaries were asso ciated with substantially more added loss at low temperatures. Cal culations in Section III showed that the coating with thin primary and low added loss at -40°C needs about four times as much strain to buckle as the one with thick primary and high added loss at -40°C.…”

Section: Discussionmentioning

confidence: 92%

Thermal Buckling of Dual-Coated Fiber

Lenahan

1985

At&T Technical Journal

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An analysis of buckling is presented for dual‐coated fibers within their coating at low temperatures. Buckling causes microbending of the fiber axis, the prime source of added optical loss in the fiber. Buckling is caused by compressive stress exerted on the fiber by the coating, which arises because the thermal expansion coefficient of the coating is substantially larger than that of the fiber. Calculations show that buckling is more likely when the inner primary coating layer is soft and thick. Previous experimental results on fibers in cables indicate that softer, thicker primaries lead to more added loss at low temperatures, contrary to the simple model where lateral pressure imprints irregularities onto the path of the fiber. Such is the evidence that buckling occurs. The theory is applied to various coating designs. The calculated results rank the low‐temperature performance reliably, but they also indicate that thermal strain falls short of the buckling strain. Other sources of strain are suggested, including a mechanism whereby irregularities induced by lateral pressure on the outside produce bending moments on the fiber.

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“…Any eccentricity of the jacket however can generate fiber microbending and any defects in the coat integrity or even fluctuations in coating diameter can exaggerate this effect [22]- [24]. For example, when a "soft-hard" combination such as nylon 12 on silicone resin has been used, and axial contraction can occur in the stronger hard coating.…”

Section: Tight Designmentioning

confidence: 99%

A review of the environmental factors affecting optical cable design

Wiltshire

Reeve

1988

J. Lightwave Technol.

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Absfrael-This paper reviews the environmental factors that affect optical cable designs. The main environmental factors of cuncern are fiber bending loss, hydrogen loss degradation, and stress corrosion. Each of these factors is examined with respect to the impact on optical cable design. Due ti) the limited field data available on environmental effects, it is necessary for cable designers to rely on theoretical analysis and laboratory test data; this has resulted in a conservative optical cable design philosophy. This situation should improve as mure field data becomes available.

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Excess loss of single-mode jacketed optical fiber at low temperature

Cited by 41 publications

References 2 publications

Effect of initial curvature on low temperature microbending in optical fibers

Effect of initial curvature on low temperature microbending in optical fibers

Thermal Buckling of Dual-Coated Fiber

A review of the environmental factors affecting optical cable design

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