Title :
Measurements and calculations of the LP01 intensity of SM fibers far off the core
Author :
Hagemann, Hans-Jiirgen ; Wiechert, Detlef U.
Author_Institution :
Philips Res. Lab., Aachen, Germany
fDate :
4/1/1992 12:00:00 AM
Abstract :
Transverse offset measurements with a dynamic range of 106 were performed to determine the autocorrelation of the intensity as a function of the fiber´s radial coordinate between 0 and 30 μm. Various matched-cladding, depressed-cladding, and dispersion-flattened single-mode fibers were investigated at wavelengths of 1150, 1300, and 1550 nm. The experimental results are compared to analytical approximations and numerical calculations. Satisfactory agreement for all types of fibers is found if the refractive-index profiles are evaluated carefully and if the wave equation is solved numerically. The results are useful for a realistic estimation of the influence of impurities and imperfections of the substrate tubes used for the plasma chemical vapor deposition (PCVD) process on the attenuation of the fibers
Keywords :
optical fibres; optical testing; optical workshop techniques; plasma CVD; refractive index measurement; 0 to 30 micron; 1150 nm; 1300 nm; 1550 nm; IR; LP01 intensity; SM fibers; analytical approximations; autocorrelation; depressed-cladding; dispersion-flattened; dynamic range; fibre attenuation; imperfections; impurities; matched-cladding; numerical calculations; plasma chemical vapor deposition; radial coordinate; refractive-index profile measurement; refractive-index profiles; single-mode fibers; substrate tubes; transverse offset measurements; wave equation; Autocorrelation; Chemical vapor deposition; Coordinate measuring machines; Dynamic range; Impurities; Partial differential equations; Performance evaluation; Plasma chemistry; Plasma waves; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
