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Proceedings Paper

Ultra Low Microdeformation Loss Predictions in Single Mode Fibers at Long Wavelengths
Author(s): M. M. Broer; K. L. Walker
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Paper Abstract

Extrinsic losses in long wavelength glass fibers (2-10 µm), which are related to the waveguide structure, must be reduced to ultra low levels to utilize the intrinsic low loss levels(10-3-10-2 dB/km). Two important loss mechanisms are microdeformation (microscopic bends and core diameter fluctuations) and radiative loss due to macrobending. Using a coupled mode and a spotsize theory, microdeformation losses are calculated for single mode, dispersion shifted, heavy metal halide glass fibers. Very low microdeformation losses can be achieved with modest values of the refractive index difference at long wavelengths for short to intermediate perturbation correlation lengths. For long correlation lengths it may be difficult to achieve very low losses at wavelengths > 3 microns. The macrobending loss calculation results determine the lower limit of the refractive index differences.

Paper Details

Date Published: 12 May 1986
PDF: 7 pages
Proc. SPIE 0618, Infrared Optical Materials and Fibers IV, (12 May 1986); doi: 10.1117/12.961087
Show Author Affiliations
M. M. Broer, AT&T Bell Laboratories (United States)
K. L. Walker, AT&T Bell Laboratories (United States)

Published in SPIE Proceedings Vol. 0618:
Infrared Optical Materials and Fibers IV
Paul Klocek, Editor(s)

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