Fiber optic cold connection will completely replace hot melt into FTTH mainstream

With the launch of China's "Broadband China", the FTTH fiber-to-the-home fiber-optic technology dispute has not stopped. The fiber-optic cold connection is widely used abroad because of its convenience, high efficiency, and low construction cost, especially in Japan. In Korea and other places, it has been widely used, and practice has proved that cold connection is feasible. In the past two years of domestic use, the situation is not ambition for four reasons:
1. The extensive use of the cutting knife to form the quality defects of the on-site fiber-cutting appearance.
2. The insufficiency of the preset fiber optic connector, that is, the quality of the connection cannot be fully recognized.
3. connector manufacturers are mostly plagiarism, the knowledge of cold connected products only stays on the outside, there is no practical quality assurance system.
4.the large area of the use of defective optical cable, the formation of optical cable in the FTTH harsh on-site environment, the fiber sleeve is detached, the core is damaged by tensile stress, and even broken.
Fiber-optic hot-melt is the main equipment for the construction of traditional trunk lines and computer rooms. It is known for its reliable quality. It is inherently inadequate for FTTH fiber-to-the-home applications. It has large initial investment, low connection power and high construction intensity, especially for China's home optical cable. It is a 3X2 leather cable with a fiber cladding diameter of 0.25mm. The huge wire diameter difference leads to a shortened demand for electric energy support for the hot melt tube, the need for battery capacity and the requirement for the portability of the fusion splicer, and the fusion splicer. The fragility of the defective optical cable during operation caused the construction progress to be slow and slow, and even two workers could only weld 5 households per day. The complaints about the hot melt caused the local operators not to purchase the fusion splicer products in large quantities. Based on this consideration, Sumitomo, Korea and Nisshin have introduced a hot-melt connector to reduce the pigtail to the rear of the connector. It is expected to maintain the fusion joint through the structure of the connector, and use 0.25 cladding to reduce the cost. The connection loss reaches 0.2dB or more, and this product is written into China's telecom specification. Through the application, it is found that the hot-melt connector is properly prepared due to fiber cutting, and the domestic cutting knife or the worn imported cutting knife will be selected. The failure rate of cutting is greatly improved, and even breaks over 30%. The hot-melt connector is a one-time product, which consumes a lot of money, and the problem of welding machine such as equipment input, battery capacity and portability is not handled, so in addition to operation The merchants have sold hundreds of welding machines and have not used them in large quantities.