Figure 2
From: Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers
(a) Neckdown of unpolished preform observed through a polariscope; Edge of the preform neckdown transection imaged by (b) an optical microscope in transmission mode and (c) a scanning electron microscope in backscattered electron mode; (d) Diffractogram of the preform neckdown surface.
