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Optics Letters

Optics Letters


  • Vol. 18, Iss. 20 — Oct. 15, 1993
  • pp: 1715–1717

Vector theory of diffraction by a single-mode fiber: application to mode-field diameter measurements

Matt Young and Ronald C. Wittmann  »View Author Affiliations

Optics Letters, Vol. 18, Issue 20, pp. 1715-1717 (1993)

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We derive a far-field diffraction integral by (vector) electromagnetic theory; the result differs from the (scalar) Rayleigh–Sommerfeld or Kirchhoff result in that it depends on polarization. For unpolarized light, we derive a factor ( 1 + cos 2 θ ) 1 / 2 / 2 that replaces the usual obliquity factor. Omitting this factor can cause an error of the same order as the measurement uncertainty in determining the mode-field diameter of a single-mode fiber from far-field data.

© 1993 Optical Society of America

Original Manuscript: June 7, 1993
Published: October 15, 1993

Matt Young and Ronald C. Wittmann, "Vector theory of diffraction by a single-mode fiber: application to mode-field diameter measurements," Opt. Lett. 18, 1715-1717 (1993)

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