Influence of the refractive index profile on the transmission quality of gradient index optical fibres
Abstract
The problems occurring in the manufacture and investigation of fibers with the refractive index profile, required by theory, are described. The fiber core consists of multi-component-glasses and is produced by the method of inside coating of a glass tube and subsequent collapsing and drawing. The refractive index profile is determined by an interferometric method and by measuring the near field intensity distribution. The pulse broadening is measured directly. The influence of different profiles on the pulse broadening is demonstrated. Typical properties of the fibers are given: total loss: 5 dB/km at the wavelength 850 nm; pulse broadening: 1...3 ns/km; numerical aperture: 0,2...0,3.
- Publication:
-
In AGARD Opt. Fibres
- Pub Date:
- October 1977
- Bibcode:
- 1977ofio.agarS....G
- Keywords:
-
- Fiber Optics;
- Refractivity;
- Transmission Efficiency;
- Interferometry;
- Near Fields;
- Pulse Duration;
- Transmission Loss;
- Wavelengths;
- Optics