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Single-mode optical-fibre index profiling with improved resolution

Single-mode optical-fibre index profiling with improved resolution

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© The Institution of Electrical Engineers
Published

A method is given which enables one to double the resolution of the transverse interferometric technique for the index profiling of an optical fibre. This method makes use of the measured data of the phase and the deflection function of the fibre. It should find applications in the profiling of single-mode fibres which have small core diameter and the measuring instruments are limited in resolution.

Inspec keywords: light interferometry; optical fibres; refractive index measurement

Other keywords: optical fibre; refractive index; transverse interferometric technique; single mode fibre; index profiling

Subjects: Optical variables measurement; Optical refractometry and reflectometry; Fibre optics and fibre waveguides; Fibre optics; Optical interferometry

References

    1. 1)
      • H.M. Presby . Profile characterization of optical fibers—A comparative study. Bell Syst. Tech. , 1335 - 1362
    2. 2)
      • P.L. Chu , C. Saekeang . Nondestructive determination of refractive index profile and cross-sectional geometry of optical fibre preform. Electron. Lett. , 635 - 637
    3. 3)
      • L. Fogel . A note on the sampling theoerm. IRE Trans. , 47 - 48
    4. 4)
      • D. Marcuse . Focusing method for nondestructive measurement of optical index profiles. Appl. Opt. , 14 - 22
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