Fiber Optic Cable Connection Methods

The primary connection methods include permanent connections, emergency connections, and active connections.

1. Permanent Fiber Optic Connection (also known as Fusion Splicing)
This method utilizes an electrical discharge to melt the ends of two optical fibers at their junction point, thereby fusing them together. It is typically employed for long-distance splicing as well as for permanent or semi-permanent fixed connections. Its key characteristic is that it yields the lowest connection attenuation among all methods, with typical values ​​ranging from 0.01 to 0.03 dB per splice point. However, the process requires specialized equipment (a fusion splicer) and must be performed by trained professionals; furthermore, the splice point requires protection within a dedicated enclosure.

2. Emergency Connection (also known as Mechanical Splicing)
Emergency connections primarily utilize mechanical and chemical means to align and bond two optical fibers together. The main advantage of this method is that it is rapid and reliable, with a typical connection attenuation of 0.1 to 0.3 dB per splice point. However, the connection point may become unstable over extended periods of use, leading to a significant increase in attenuation; consequently, this method is intended solely for short-term emergency applications.

3. Active Connection
Active connections involve the use of various fiber optic connectors (plugs and sockets) to link one site to another, or to connect a site directly to a fiber optic cable. This method is flexible, simple, convenient, and reliable; it is widely utilized in computer network cabling within buildings. Its typical attenuation is 1 dB per connection point.