tailieunhanh - Optical Connector Tuning and Testing

With the ever-increasing demand for higher performance in the optical network, there is a need for higher performance in optical connectors. Connector performance is typically defined as a measurement of insertion loss that occurs when the connector is mated to a reference connector. Manufacturers use reference connectors for production testing of insertion loss because they provide a repeatable reference point. For a connector with a cylindrical ferrule, a reference connector is one selected for low insertion loss when mated with another reference connector regardless of rotational orientation. The low insertion loss indicates that the cores of the fibers are highly concentric relative to the outside diameter of the ferrules | Optical Connector Tuning and Testing Optical Connector Tuning and Testing With the ever-increasing demand for higher performance in the optical network there is a need for higher performance in optical connectors. Connector performance is typically defined as a measurement of insertion loss that occurs when the connector is mated to a reference connector. Manufacturers use reference connectors for production testing of insertion loss because they provide a repeatable reference point. For a connector with a cylindrical ferrule a reference connector is one selected for low insertion loss when mated with another reference connector regardless of rotational orientation. The low insertion loss indicates that the cores of the fibers are highly concentric relative to the outside diameter of the ferrules. In the real-life network service providers are more concerned with the insertion loss of randomly mated connectors. When randomly mated connector pairs can produce a greater insertion loss than the stated specification of either connector to a reference connector. This occurs when the slight coaxial misalignment of the fiber ends in the individual connectors are in opposite directions and thereby create a greater total misalignment. One of the primary ways to achieve a significant performance improvement in randomly mated cylindrical ferrule connectors is tuning. Tuning decreases insertion loss by improving the coaxial alignment of the fiber ends in intermated connectors. The accuracy of the tuning process has a direct effect on randomly intermated connector performance and is improved through an automated process. Optical Connector Tuning and Testing Introduction Transverse longitudinal and angular misalignments of optical fibers are the sources of insertion loss in fiber optic connections. Transverse insertion loss is caused by lateral mismatching of the fiber optic core and increases with the square of the distance between the centers of the cores. Sources of .