The light attenuation of cold welding depends on the laser knife and cold connector, which can be used generally, but it is certainly not fused for a long time, and the light attenuation is very small if it is cut well.
It is used for optical fiber butt joint or optical fiber butt joint pigtail, which is equivalent to making a joint (optical fiber butt joint pigtail refers to optical fiber butt joint with pigtail core instead of pigtail head as mentioned above), and it is called optical fiber cold connector for this kind of cold connection.
3M's FibrlokTMII 2529 universal optical fiber splicing system provides permanent mechanical splicing for single-mode or multimode optical fibers with cladding diameter of 125 mm. When connecting plastic-clad optical fibers with a diameter of 250 ~ 900mm, the universal 2529FibrlokTM optical fiber splicer can be used.