New silica optical fibers with nano porous silica cladding/coating

Bolesh J. Skutnik

doi:10.1117/12.424382

16 April 2001 New silica optical fibers with nano porous silica cladding/coating

Bolesh J. Skutnik

Proceedings Volume 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing; (2001) https://doi.org/10.1117/12.424382
Event: Information Technologies 2000, 2000, Boston, MA, United States

Abstract

A new type of optical fiber has been developed with all pure silica in both core and cladding. The cladding is a nano porous silica produced on line from an oligimeric organo-silicate by a modified sol-gel technology. Characteristics, mainly mechanical properties, are described. The strength and fatigue of these optical fibers are very good, even without additional protective jackets. The nano porous silica is also being evaluated as an outer coating on all silica optical fibers. Unjacketed fibers have mean Weibull strengths in bending of 6.5 to 7.6 GPa with Weibull slopes in the 40 to 60 range. Strength decrease with decreasing strain rate is similar for both jacketed and unjacketed fibers. Static fatigue results using mandrel wrap tests are also presented. Dynamic and static fatigue parameters appear to be essentially the same with values around 20. A thin polyimide jacket does improve some of the mechanical properties. Results for nano porous silica ‘buffer’ over a silica/fluorosilica core clad structure are also presented. Effects of water and dry environments are presented, including results of short to intermediate term aging in boiling water. Possible mechanisms to explain the strength and fatigue behavior are discussed in light of these fibers’ unique structure.

Citation Download Citation

Bolesh J. Skutnik "New silica optical fibers with nano porous silica cladding/coating", Proc. SPIE 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing, (16 April 2001); https://doi.org/10.1117/12.424382

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