Mechanical Splicing Loss Reduction of SMF-28 and R37003 Single-Mode Optical Fibers by Core Radius Optimization

Article Citation : Weerachai Asawamethapant , (2026) "Mechanical Splicing Loss Reduction of SMF-28 and R37003 Single-Mode Optical Fibers by Core Radius Optimization", International Journal of Industrial Electronics and Electrical Engineering (IJIEEE) , pp. 15-21, Volume-14,Issue-7

Abstract : This paper presents a study of mechanical splicing loss between SMF-28 and R37003 single-mode optical fibers by using a matching mode field model and Fresnel reflection theory. The objective is to reduce the mechanical splicing loss for optical communication systems.In the study, we found that Fresnel loss is negligible. Therefore, the total mechanical splicing loss is mainly determined by the lateral loss. By using SMF-28 and R37003 standard geometries with a fiber separation of 5 μm, the total mechanical splicing loss is 1.9682 dB, which is considered high for optical communication system. To achieve an acceptable loss range of 0.2 – 0.75 dB, we analyzed the effect of adjusting the core radii of both fibers on mechanical splicing loss. Based on the simulation results, adjusting the SMF-28 core radius cannot achieve the acceptable loss range. However, by adjusting the R37003 core radius, the total mechanical splicing loss can be significantly reduced. Specifically, when the R37003 core radius is decreased from the standard 1.45 μm to 1.00 μm, a minimum loss of 0.01 dB is obtained because the modefield radius of both fibers become well matched. These results show that a very low mechanical splicing loss can be achieved by R37003 core radius optimization. Keywords - Mechanical splicing loss, Matching mode field model, Fresnel Reflection theory, Mode field radius, Core radius optimization

Type : Research paper

Published : Volume-14,Issue-7