How to turn single-core optical fiber to dual-core?

　　Converting a single-core fiber to a dual-core fiber can be achieved by the following methods:

　　First, the use of fiber optic couplers

　　An optical fiber coupler is a device that can connect two or more optical fibers together to tranSMit optical signals in it. Through an optical fiber coupler, two single-core fibers can be connected to form a dual-core fiber. However, it should be noted that since the transmission of optical fibers is limited by mode, the relative position and attenuation of the two single-core fibers need to be taken into account, otherwise signal attenuation and distortion may be caused.

　　Welding method

　　Direct welding: The two single-core optical fibers are first peeled, cleaned, polished, and then welded by a welding machine to connect them together to form a dual-core optical fiber. This method requires a high level of technology and professional welding equipment.

　　Taper coupling: Firstly, a fusion splitter is used to fuse one of the cores of the single-mode fiber and the dual-core fiber. Then, the coating layer of the dual-core fiber is stripped at a certain distance near the fusion point, and the bare fiber is placed on the fiber taper fixture for melting taper. The coupling degree of the two cores of the dual-core fiber is judged by monitoring the change of the optical power at the through end during the taper process. When the optical power at the through end drops to nearly half of the initial value, the taper is stopped. At this time, the splitting ratio of the two cores of the dual-core fiber is about 1:1. This method can realize the simultaneous coupling from the single-mode fiber to the two cores of the dual-core fiber, and the loss is low and the success rate is high.

　　Third, use a cable splitter or cable adapter

　　optical cable splitters and cable adapters are two devices that can convert a single-core cable into a dual-core cable.

　　Optical cable splitter: insert a single-core cable into the single-core port of the optical cable splitter, and then insert two dual-core cables into the dual-core port of the optical cable splitter. After connecting, test to ensure normal signal transmission.

　　Optical cable adapter: insert a single-core cable into the single-core interface of the optical cable adapter, and then insert two dual-core cables into the dual-core interface of the optical cable adapter. After connecting, test to ensure normal signal transmission.

　　When using these two devices, it is necessary to choose the appropriate equipment model and specification to ensure the quality and stability of the cable conversion. At the same time, it is necessary to pay attention to the connection method and length of the cable during the conversion process, so as not to affect the transmission quality of the signal.

　　Four, optical fiber one to two connectors

　　The optical fiber one-to-two connector uses the principle of optics to divide the input optical signal into two channels through the optical splitter, and then transmits it to the two output ports respectively. In this way, the optical fiber line that can only carry one optical signal can transmit two optical signals at the same time. However, it should be noted that the optical signal after tapping will be lost, and the appropriate connector type needs to be selected according to the application scenario.

　　Precautions

　　When converting a single-core fiber to a dual-core fiber, it is necessary to ensure that the converted dual-core fiber can meet the transmission requirements, including transmission rate, transmission distance, and attenuation.

　　During the conversion process, it is necessary to pay attention to the cleaning and protection of the optical fiber to avoid damage or contamination of the optical fiber, which will lead to a decrease in transmission quality.

　　For different application scenarios and specific requirements, different dual-core cable solutions can be selected to achieve better transmission results and performance.

　　In summary, there are various methods for converting a single-core fiber to a dual-core fiber, and the specific choice of which method needs to be determined according to actual needs and technical level.