The different polish types of fiber connectors affect the optical return loss (ORL) of the connector. ORL is the amount of light that is reflected back to the source when it strikes the end face of the connector. A lower ORL means that less light is reflected back, which results in a lower signal loss.
- PC (Physical Contact) connectors have a flat polished end face. This type of connector was the first to be developed, and it is still widely used today. However, PC connectors have a relatively high optical return loss (ORL), which means that some of the light is reflected back towards the source. This can lead to signal attenuation and loss of performance.
- UPC (Ultra Physical Contact) connectors have a slightly convex polished end face. This type of connector has a lower ORL than PC connectors, which means that less light is reflected back towards the source. This results in better performance and signal integrity.
- APC (Angled Physical Contact) connectors have an 8-degree angled polished end face. This type of connector has the lowest ORL of all the fiber connectors, which means that the least amount of light is reflected back towards the source. This results in the best performance and signal integrity.
In addition to the polish type, there are also different physical connector designs. The most common fiber connector designs are:
- LC connectors are small and lightweight, making them ideal for use in high-density applications. They are also very easy to connect and disconnect.
- SC connectors are larger than LC connectors, but they are also more durable. They are a good choice for applications where frequent connection and disconnection is required.
- FC connectors are the oldest and most rugged fiber connector design. They are a good choice for applications where environmental conditions are harsh.
- ST connectors are similar to FC connectors, but they have a simpler design. They are a good choice for cost-sensitive applications.
The choice of fiber connector depends on the specific application requirements. For example, if connection density and available space are critical, then an LC connector should be used. If cost is a major factor, then an ST connector may be a better choice.