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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 17, Iss. 18 — Sep. 15, 1978
  • pp: 3014–3017

Polarization characteristics of noncircular core single-mode fibers

V. Ramaswamy, W. G. French, and R. D. Standley  »View Author Affiliations


Applied Optics, Vol. 17, Issue 18, pp. 3014-3017 (1978)
http://dx.doi.org/10.1364/AO.17.003014


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Abstract

It is well known that geometrical or dielectric imperfections in conventional graded-index single-mode fibers depolarize light after a few centimeters. A slight improvement in the polarization performance of these fibers is achieved by introducing noncircularity in the core shape. This is evident from the measurements on borosilicate fibers with dumbbell shaped cores. This result is correlated with Marcatili’s analysis, which shows that changing the core geometry, from square to rectangular, does not appreciably alter the difference in the propagation constants of the two fundamental modes with orthogonal polarizations. Thus, the noncircular geometry and the associated increase in stress-induced birefringence introduced during the manufacturing process alone are not sufficient to improve the polarization performance, and the enhancement of the anisotropic birefringence is necessary to achieve single-polarization fibers.

© 1978 Optical Society of America

History
Original Manuscript: January 25, 1978
Published: September 15, 1978

Citation
V. Ramaswamy, W. G. French, and R. D. Standley, "Polarization characteristics of noncircular core single-mode fibers," Appl. Opt. 17, 3014-3017 (1978)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-17-18-3014

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