Liquid nitrogen strengths of coated optical glass fibres

France, P. W.; Paradine, M. J.; Reeve, M. H.; Newns, G. R.

doi:10.1007/bf00552090

Cited by 83 publications

(24 citation statements)

References 13 publications

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“…The mechanical strength of the optical fibers was determined by the method of two-point bending between parallel plates [18]. The following measurement conditions were used: temperature was equal to 20°C; air was used as environment; the closing rate of the plates was 1 mm/s; the number of samples in each series of measurement was not less than 40.…”

Section: Methodsmentioning

confidence: 99%

Infrared fibers based on Te–As–Se glass system with low optical losses

Shiryaev

Adam

Zhang

et al. 2004

Journal of Non-Crystalline Solids

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Section: Methodsmentioning

confidence: 99%

Infrared fibers based on Te–As–Se glass system with low optical losses

Shiryaev

Adam

Zhang

et al. 2004

Journal of Non-Crystalline Solids

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“…At the lower speeds, up to 10 specimens could be broken simultaneously by supporting the fibers between multigrooved faceplates. 25 No equilibration is needed for bare fibers since the glass surface is immediately in contact with the humid environments. Bare fibers must be tested one at a time using faceplates without grooves to avoid abrasion damage.…”

Section: Methodsmentioning

confidence: 99%

Humidity Dependence of the Fatigue of High‐Strength Fused Silica Optical Fibers

Armstrong

Matthewson

Kurkjian³

2000

Journal of the American Ceramic Society

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Strength and dynamic fatigue behavior of silica fibers has been measured as a function of ambient humidity. Bare and polymer-coated fibers were compared to determine the influence of the coating. The results verify earlier work that suggests the degradation reaction is approximately second order with respect to humidity. However, we verify this result using rigorous data analysis techniques and, unlike the earlier work, the result is shown to be independent of the form of the kinetic model for crack growth. Trends in the calculated fatigue parameters illustrate that a simple exponential crack growth law best describes the humidity data. No significant differences were found between coated and bare fibers, provided the coated fibers were properly equilibrated. A data analysis methodology is given for obtaining valid reaction orders independently of the crack growth law form.

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“…17 The mechanical two-point bending method was first developed to study the strength of optical fibers and the fracture of the fiber was sensed by an acoustic detector. [18][19][20] Recently this method was modified to characterize the fracture of thin conductive layers, such as ITO, on a polymer substrate by measuring its electrical resistance. 21 The electromechanical two-point bending method has great advantages in determining critical failure strains for a number of reasons: (i) The sample has no clamping problem, such as slippage and stress gradient at the clamping jaws, and when the sample is under pure elastic deformation 21 it has a well specified geometry; in this case, the applied strain at any location along the curvature can be accurately determined.…”

Section: Introductionmentioning

confidence: 99%

Subcritical crack growth in SiNx thin-film barriers studied by electro-mechanical two-point bending

Guan

Lavèn

Bouten

et al. 2013

Journal of Applied Physics

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Mechanical failure resulting from subcritical crack growth in the SiNx inorganic barrier layer applied on a flexible multilayer structure was studied by an electro-mechanical two-point bending method. A 10 nm conducting tin-doped indium oxide layer was sputtered as an electrical probe to monitor the subcritical crack growth in the 150 nm dielectric SiNx layer carried by a polyethylene naphthalate substrate. In the electro-mechanical two-point bending test, dynamic and static loads were applied to investigate the crack propagation in the barrier layer. As consequence of using two loading modes, the characteristic failure strain and failure time could be determined. The failure probability distribution of strain and lifetime under each loading condition was described by Weibull statistics. In this study, results from the tests in dynamic and static loading modes were linked by a power law description to determine the critical failure over a range of conditions. The fatigue parameter n from the power law reduces greatly from 70 to 31 upon correcting for internal strain. The testing method and analysis tool as described in the paper can be used to understand the limit of thin-film barriers in terms of their mechanical properties.

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Liquid nitrogen strengths of coated optical glass fibres

Cited by 83 publications

References 13 publications

Infrared fibers based on Te–As–Se glass system with low optical losses

Infrared fibers based on Te–As–Se glass system with low optical losses

Humidity Dependence of the Fatigue of High‐Strength Fused Silica Optical Fibers

Subcritical crack growth in SiNx thin-film barriers studied by electro-mechanical two-point bending

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