Fig. 3: Side glowing characterization of POF.
From: Accelerating the solar-thermal energy storage via inner-light supplying with optical waveguide
a Optical image of POF. b–e SEM images of POF treated with the organic solvent for 0 s (b, c) and 10 s (d, e). f, g Optical photographs of the side-glowing POF treated with the organic solvent for 0 s (f) and 10 s (g). h The light intensity distribution of POF treated with the organic solvent for different time. i Ray trajectories in POF with different size pothole, 5 µm (left) and 25 µm (right). The color expression for the refracted rays indicates the transmittance as they exit the POF. j Deposited ray power on the lateral and bottom surface of POF with different size pothole, 5 µm (left) and 25 µm (right).
