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(a,b) Are SEM images of the silica SCF and ECF (9 μm core diameter), respectively. (c) Is the GO film coated on the exposed core surface of the ECF by filling and baking, (d) Is a magnified area in (c), (e) Is the GO film coated on the exposed core surface of the ECF using 532 nm ps laser and (f) is a magnified area in (e).
