Residual stress relaxation in the core of optical fiber by CO2 laser irradiation

B. H. Kim, Y. Park, T. J. Ahn, D. Y. Kim, B. H. Lee, Y. Chung, U. C. Paek, W. T. Han

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)


We observed residual stress relaxation by CO2 laser irradiation in the cores of optical fibers by direct stress measurement. It was demonstrated that the mechanical stress was fully relaxed by CO2 laser irradiation and that the remaining stress in the core was thermal stress that was due to a mismatch of the thermal expansion coefficients of the fiber core and cladding. The net core stresses after relaxation were 17, 68, and 203 MPa in Ge-B-codoped fibers drawn at 0.53, 1.38, and 3.48 N, respectively. Changes in the refractive indices of the cores as a result of residual stress relaxation were also estimated.

Original languageEnglish
Pages (from-to)1657-1659
Number of pages3
JournalOptics Letters
Issue number21
Publication statusPublished - 2001 Nov 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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