Abstract

This paper discusses the problem of the swelling of a fused quartz tube when it is heated locally. An equation is obtained that describes the viscous-flow kinetics of the melted section of the tube. Studies were carried out of how the maximum swelling diameter of the tube and the time it takes to swell depend on the relative length of the heated section of the tube and on its temperature. The results are experimentally checked when single quartz capillaries swell, as well as when a capillary assembly consisting of blanks for drawing microstructured optical fiber with two layers of air holes is sintered.

Femtosecond laser writing of porous capillaries inside fused silica glass

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Extraordinary laser-induced swelling of oxide glasses

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High-density gas capillary nozzles manufactured by hybrid 3D laser machining technique from fused silica

Vidmantas Tomkus, Valdas Girdauskas, Juozas Dudutis, Paulius Gečys, Valdemar Stankevič, and Gediminas Račiukaitis
Opt. Express 26(21) 27965-27977 (2018)

Optical gratings fabricated using the capillary-assisted self-assembly of nanoparticles on a flexible substrate

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Appl. Opt. 62(21) 5786-5793 (2023)

Evanescent-wave optical Cr VI sensor with a flexible fused-silica capillary as a transducer

Shiquan Tao and T. V. S. Sarma
Opt. Lett. 31(10) 1423-1425 (2006)