An optical technique for measuring the core radius of high-Δ optical fibers is described. Variations in the core radius of step-index fibers can be measured down to a scale of 1 nm.
© 1995 Optical Society of America
Peter N. Saeta, "Optical measurements of the core radius of high-Δ fibers with 1-nm resolution," Appl. Opt. 34, 177-182 (1995) doi: 10.1364/AO.34.000177