Hazards For Fiber Optics In The Medical Application Environment

Skutnik, Bolesh J.; Beck, W. B.; Hodge, M. H.

doi:10.1117/12.940677

Cited by 7 publications

(4 citation statements)

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“…In this technique /4,1.1m of fiber is wrapped around mandrels of various diameters. The diameter of the mandrel and the fiber dimensions determine the stress the fiber experiences [1]. All samples wrapped on mandrels were immersed in water at room temperature (23 °C) and the time to failure measured.,_ The accelerated aging (zero stress aging) was performed by placing loose N30 cm (<5000 psi bend stress) diameter coils of fiber in boiling distilled water (100 °C).…”

Section: Methodsmentioning

confidence: 99%

“…Specialty applications, particularly in the medical [1] and military areas, often require not only stringent optical specifications but high mechanical performance as well.…”

Section: Introductionmentioning

confidence: 99%

“…These mechanical properties are due primarily to the adherent hard polymer cladding which actually has two functions: (1) providing the layer of low refractive index necessary to propagate light in the fiber, and (2) providing a surface treatment which passivates the surface of the pristine silica core. This passivating process [5] essentially deactivates high energy sites on the silica surface which are prone to water attack.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this paper is to (1) show that the hard polymer coating can be used to improve the dynamic strength and fatigue behavior of singlemode fiber; (2) compare the results to conventional singlemode fiber; (3) demonstrate this fiber construction can be successfuly utilized in producing long fiber length ( >10 km) at high proof test levels ( >300 kpsi) with a reduced buffer diameter ( <200um).…”

Section: Introductionmentioning

confidence: 99%

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Singlemode Optical Fibers With Enhanced Strength And Fatigue Resistance

Clarkin¹,

Drenzek²,

Skutnik³

1990

Fiber Optics Reliability: Benign and Adverse Environments III

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In recent years the reliability of optical fibers has become of great concern due to military, medical and other specialty high performance applications. With the nearing promise of the local loop and its inherent requirements for a robust fiber, even the telcom market has come to value research on stronger, more fatigue resistant fibers.With the extension of Hard Clad Silica (HCS ®) technology to all silica optical fibers, a new singlemode fiber (smf) structure has been developed with enhanced reliability. A thin, hard, adherent, polymeric coating is placed between the silica cladding and the typical acrylate buffer coating. This paper presents results on the mechanical properties of this new singlemode fiber and compares it with the commercially available smf type. Dynamic strength, Weibull mean strength and slope, and static fatigue resistance, especially after zero -stress aging, are superior for the new fiber over the conventional smf fiber. Compared to commercial smf, the new fiber can withstand high stresses in moist environments for 40 -60 times longer. More significantly after zero-stress aging in boiling water, the commercial smf break in <1 sec at stresses above 2.0 GPa (290 ksi), while the new fibers would still have expected lifetimes at 2.0 GPa stress of >9 years. These results make these fibers very useful for high reliability, high strength, long -haul fiber applications.1. ABSTRACTIn recent years the reliability of optical fibers has become of great concern due to military, medical and other specialty high performance applications. With the nearing promise of the local loop and its inherent requirements for a robust fiber, even the telcom market has come to value research on stronger, more fatigue resistant fibers.With the extension of Hard Clad Silica (HCS®) technology to all silica optical fibers, a new singlemode fiber (smf) structure has been developed with enhanced reliability. A thin, hard, adherent, polymeric coating is placed between the silica cladding and the typical aerylate buffer coating. This paper presents results on the mechanical properties of this new singlemode fiber and compares it with the commercially available smf type. Dynamic strength, Weibull mean strength and slope, and static fatigue resistance, especially after zero-stress aging, are superior for the new fiber over the conventional smf fiber. Compared to commercial smf, the new fiber can withstand high stresses in moist environments for 40-60 times longer. More significantly after zero-stress aging in boiling water, the commercial smf break in <1 sec at stresses above 2.0 GPa (290 ksi) , while the new fibers would still have expected lifetimes at 2.0 GPa stress of >9 years. These results make these fibers very useful for high reliability, high strength, long-haul fiber applications.

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Section: Methodsmentioning

confidence: 99%

“…Specialty applications, particularly in the medical [1] and military areas, often require not only stringent optical specifications but high mechanical performance as well.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations