Fiber optic patch cords are characterized by:

Low insertion loss

High return loss

Good repeatability

Good interchange

Excellent environmental adaptability

Construction

A fiber optic patch cord is constructed from a core with a high refractive index, surrounded by a coating with a low refractive index that is surrounded by a protective jacket. Transparency of the core permits transmission of optic signals with little loss over great distances. The coating\'s low refractive index reflects light back into the core, minimizing signal loss. The protective jacket minimizes physical damage to the core and coating.