Which type of connector is commonly used in single-mode applications due to its ability to maintain low loss?

The SC connector is commonly used in single-mode applications because it features a design that allows for precise alignment and minimal connection loss. This connector employs a push-pull mechanism, which makes it easy to connect and disconnect while ensuring a secure connection that helps maintain the integrity of the optical signal. Additionally, the ceramic ferrule used in SC connectors enhances durability and provides excellent performance in terms of low insertion loss and high return loss, making them ideal for long-distance fiber optic communication.

Other connector types, while useful in different scenarios, may not provide the same level of performance in single-mode applications. The ST connector, for example, is widely used in multimode applications and features a bayonet mount, which may introduce greater loss in single-mode scenarios. MTP connectors are often used for high-density applications and multi-fiber systems but are not specifically tailored for single-mode use. The FC connector is known for its stability and low back reflection, but it is typically more common in high-frequency applications rather than standard single-mode installations. In contrast, the SC connector's attributes make it the preferred choice for optimizing performance in single-mode optical fibers.