The study presents an optimum method for fabricating low loss fused biconical taper couplers (FBTCs). FBTCs achieve a low excess loss of 0. We describe two prototype manufacturing process that produces low-loss fibre tapers and fused FBT coupler devices using CO2 lasers as the heat source instead of a flame, as is the norm in modern. A known low loss fused biconical taper fiber optic coupler is fabricating by heating and pulling a plurality of fused optical fibers which may be twisted to provide a minimum biconical taper region. The results show that the taper angle of the device parameter is strongly dependent on the technological parameters of the filament range, pulling length, and gas flow rate. The FBTC having a. For PM low ratio tap coupling at wavelengths between 1450–1620 nm in harsh environments such as undersea and space, where the costs of component replacement are prohibitive. Need a product customized? We can customize our products to fit your requirements.