Relationship between mirror dimensions and failure stress for optical fibers

Robert J. Castilone; G. Scott Glaesemann; Thomas A. Hanson

doi:10.1117/12.481339

25 June 2002 Relationship between mirror dimensions and failure stress for optical fibers

Robert J. Castilone, G. Scott Glaesemann, Thomas A. Hanson

Author Affiliations +

Proceedings Volume 4639, Optical Fiber and Fiber Component Mechanical Reliability and Testing II; (2002) https://doi.org/10.1117/12.481339
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

Standard glass optical fiber was intentionally damaged and strength tested in tension for a wide range of failure stress values. The mirror/mist boundary on each specimen was measured and compared to the measured failure stress. When the size of the fracture mirror is small compared to the fiber diameter, the well-known linear square root dependence of strength on mirror size was reaffirmed. However, when the mirror size approaches the fiber diameter, this relationship does not hold. The classical relationship overestimates the failure stress for large mirrors. It was determined that the circular shape of the fiber contributes to, but can not fully account for, departure from the classical strength/mirror relationship. A new empirical relationship was developed to enable predictive determinations of failure stress to levels as low as 20 to 25 kpsi (0.14 to 0.17 GPa).

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Robert J. Castilone, G. Scott Glaesemann, and Thomas A. Hanson "Relationship between mirror dimensions and failure stress for optical fibers", Proc. SPIE 4639, Optical Fiber and Fiber Component Mechanical Reliability and Testing II, (25 June 2002); https://doi.org/10.1117/12.481339

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