Fiber Optic Loopback is designed to provide a media of return patch for a fiber optic signal; typically it is used for fiber testing applications or network restorations. For the testing applications, the loopback signal is used for diagnosing a problem. Sending a loopback test to network equipment, one at a time, is a technique for isolating a problem. Similar as patch cables, fiber optic loopback can be with various jacket types and cable diameters.
Applications: 
Cable TV, LAN, Telecom network, test equipment
Features:
* Various connector types available
* Low insertion loss and back reflection loss

 
Connector Type
LC 
Polishing
UPC
Return Loss
55 dB
Insertion Loss
0.30 dB
Ferrule Material
Ceramic (zirconia)
Ferrule Diameter
1.25 mm / 2.5 mm
Durability
500 Cycles
Operation Temperature Range
-20??C +70??C