Connector performance directly impacts optical transmission quality. To ensure efficient signal transmission in fiber optic links, two key optical performance indicators, insertion loss and return loss, are typically used for evaluation. The primary function of a fiber optic connector is to rapidly connect two optical fibers, ensuring precise core alignment and enabling precise interfacing between the two fiber endfaces. This maximizes the coupling of the emitted light from the transmitting fiber into the receiving fiber. Therefore, when the fiber cores are not precisely aligned, or when there is a misalignment in the connector ferrule positioning, both insertion loss and return loss can be significantly affected.

Suitable high-quality fiber optic connectors contribute to the long-term stable operation of high-speed transmission systems. Additionally, there are some usage tips to optimize insertion loss and return loss:

1. Ensure the cleanliness of the fiber optic connectors before use. If contaminated, use appropriate tools for cleaning.
2. Avoid applying any undue stress on the optical fibers during use, and never bend the fibers beyond their minimum bend radius.
3. Minimize bending, coiling, fusion splicing, and coupling of fiber optic jumper cables, as these actions may cause refraction of the optical signal through the fiber cladding. If coiling is necessary, maintain a larger loop radius.
4. Use factory-terminated fiber optic cables. These terminations are performed under strict quality control and typically come with manufacturer guarantees.
5. Balance power loss with fiber cost considerations. Using low-quality fibers may result in greater cost losses in the long run.

By following these guidelines and using high-quality fiber optic connectors, you can minimize insertion loss and return loss, ensuring efficient signal transmission and optimal performance in your fiber optic network.