Abstract

The experimental aspects of a sensitive, nondestructive, and noncontacting method to measure the noncircularity of dielectric cylinders are presented. The technique makes use of the variation in the position of a fringe in the backscattered light arising from a beam that is incident at right angles to the cylinders axis, as the cylinder is rotated. The method has been applied to optical fibers, and ellipticities as small as 0.997 have been measured. The results are in agreement with photomicroscopy measurements and with theoretical predictions.

© 1976 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. D. Marcuse, H. M. Presby, Bell Syst. Tech. J. 54, 3 (1975).
  2. D. Marcuse, Appl. Opt. 13, 1903 (1974).
    [CrossRef] [PubMed]
  3. H. M. Presby, J. Opt. Soc. Am. 64, 280 (1974).
    [CrossRef]
  4. H. M. Presby, Appl. Phys. Lett. 24, 422 (1974).
    [CrossRef]
  5. D. Marcuse, H. M. Presby, J. Opt. Soc. Am. 65, 367 (1975).
    [CrossRef]
  6. H. M. Presby, D. Marcuse, Appl. Opt. 13, 2882 (1974).
    [CrossRef] [PubMed]

1975 (2)

D. Marcuse, H. M. Presby, Bell Syst. Tech. J. 54, 3 (1975).

D. Marcuse, H. M. Presby, J. Opt. Soc. Am. 65, 367 (1975).
[CrossRef]

1974 (4)

Appl. Opt. (2)

Appl. Phys. Lett. (1)

H. M. Presby, Appl. Phys. Lett. 24, 422 (1974).
[CrossRef]

Bell Syst. Tech. J. (1)

D. Marcuse, H. M. Presby, Bell Syst. Tech. J. 54, 3 (1975).

J. Opt. Soc. Am. (2)

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (5)

Fig. 1
Fig. 1

Experimental setup to measure fiber ellipticity.

Fig. 2
Fig. 2

Backscattered light patterns at 20° increments from 0° to 180° for an elliptical fiber with b/a = 0.923. The white line is drawn at ϕ = 0°.

Fig. 3
Fig. 3

Calculated plots of position of extreme rays ϕ+ and ϕ (solid curves) vs angle of incidence, compared with measured points.

Fig. 4
Fig. 4

Calculated plot of b/a vs ϕ+ϕ0 for a fiber with n = 1.457 (solid line) and a comparison of measured ellipticity values by backscattered light (closed circles) and by photomicroscopy (open circles).

Fig. 5
Fig. 5

Photomicrographs of (a) fiber with b/a = 0.923 and (b) fiber with b/a = 0.997.

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

ϕ 0 = ± { 4 arcsin ( 4 n 2 3 n 2 ) 1 / 2 2 arcsin ( 4 n 2 3 ) 1 / 2 } .
ϕ ( α i ) = ϕ + ( 180 α i ) .
ϕ + ϕ 0 1 ( b / a ) = F ( n , α i ) .

Metrics