Numerical simulation of transport in optical fiber drawing with core-cladding structure

Chunming Chen, Yogesh Jaluria

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

Optical fibers are typically heated and drawn from silica preforms, which usually consist of two concentric cylinders called the core and the cladding, in a high-temperature furnace. For optical communication purpose, the core always has a higher refractive index than the cladding. In order to investigate the effect of core-cladding structure on the optical fiber drawing, a numerical model has been developed in this work. Axisymmetric flows of a double-layer glass and aiding purge gas in a concentric cylindrical furnace are considered. The thermal and momentum transport in both glass layers and gas are coupled at the interface boundaries. The neck-down profile is generated using an iterative scheme. The zonal method is applied to model the radiation transfer in the glass preform and the gas. Coordinate transformations are used to convert complex domains into cylinders. Stream function, vorticity and energy equations for the core, the cladding and the purge gas are solved by finite different methods using a false transient method coupled with an alternating direction implicit (ADI) method. A second order differencing scheme is used for discretization. The numerical results are validated by comparing with experimental and numerical results available in the literature.

Original languageEnglish (US)
Pages1043-1047
Number of pages5
DOIs
StatePublished - 2004
Event2004 ASME Heat Transfer/Fluids Engineering Summer Conference, HT/FED 2004 - Charlotte, NC, United States
Duration: Jul 11 2004Jul 15 2004

Other

Other2004 ASME Heat Transfer/Fluids Engineering Summer Conference, HT/FED 2004
CountryUnited States
CityCharlotte, NC
Period7/11/047/15/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Keywords

  • Core-Cladding Structure
  • Optical Fiber Drawing
  • Zonal method

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