An electrostatic fiber manufacture method called electrospinning, displayed more attention because of its adaptability and applications in various fields. The polymer fibers named wet-electrospun (WES) are promising structure for little, adaptable optical fiber devices, for example, lasers, sensors, and waveguides. The shape of WES polymer fibers are represented with aninnate barrel shaped geometry similar to optical fibers that can be created using minimal effort and low-vitality producing procedures. The loss obtained before the heating process is 17.0 dB cm −1. Here, the loss caused by propagation in WES fibers is reduced using a versatile heat treatment approach (HTA). Also, this HTA significantly reduces the loss in the range of 8.1 dB cm −1 at a wavelength of 533 nm, as the fibers are heated over 49.8 C, which is the glass transition temperature. The propagation loss is also tested for the following 350, 400, 450, 500 nm wavelengths and shown better results. Also, heating conditions are optimized at a wavelength (533 nm) to decrease the propagation loss below 5 dB cm −1. For this calculation social spider optimization (SSO) based optimized temperature rising method is proposed. The proposed method is simulated in the MATLAB platform. Thus, the loss minimization is attributed to excess light scattering (LS) that can be reduced by reducing the propagation loss in WES PDLLA (Poly racemic blend of D, L-lactic acid units) fibers by effective heat treatment approach.