Fig.4

The calculated results of the fraction of optical power in the fiber η with 4 μm to125 μm cladding diameters. The blue line denotes that the external medium is water, and the red line denotes that the external medium is ATs. The η is 92.4% at 780 nm and 85.3% at 1030 nm when the cladding diameter is 12 μm and the external medium is ATs