Determination of core diameter and refractive-index difference of single-mode fibres by observation of the far-field pattern
- 1 January 1976
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Journal on Microwaves, Optics and Acoustics
- Vol. 1 (1), 13-17
- https://doi.org/10.1049/ij-moa.1976.0002
Abstract
A method is described for determining unambiguously, from the far-field pattern of single-mode fibres, the core diameter and the refractive-index difference between core and cladding. It involves measurements only of the half-power width of the main lobe and the width of the first minimum. Universal curves are presented that can be used with single-mode fibres or any fibre operating in the single-mode regime. Independent determinations of core diameter over the range 4–8μm by an etching technique are in excellent agreement with those obtained from the far-field pattern.Keywords
This publication has 1 reference indexed in Scilit:
- Laser Receivers, Devices, Techniques, SystemsOptica Acta: International Journal of Optics, 1967