Patent ID: 6178222
Filing Date: 2001-01-23
Classification: B82Y,G01N

Abstract:
A method for analyzing the doping of an optical fiber core, the method comprising the steps of:cutting a sample slice of an optical fiber with a focused ion beam, the sample slice having a thickness not greater than about 20 .mu.m;placing the sample slice onto a surface of an X-ray photoresist layer disposed on a support;exposing the sample slice on the photoresist layer to soft X-rays having a wavelength between about 0.5 and 50 nm;developing the photoresist layer to produce a contact microradiography;analyzing the contact microradiography produced on the developed photoresist layer with an electron microscope or an Atomic Force microscope; andobtaining a map of the distribution of dopant ions in the optical fiber core.