What are fiber optic loopback modules

Fiber Optic Loopback modules are also called optical loopback adapters. There are LC loopback modules, SC loopback modules and other types. They are designed for testing, engineering and the burn-in stage of boards or other equipment. Optical loopback adapters provide system test engineers a simple but effective way of testing the transmission capability and the receiver sensitivity of network equipment. Fiber Optic Loopback Modules are designed for testing and engineering purposes. Fiber Optic Loopback Modules provide system test engineers with a simple but effective way of testing the transmission capability and receiver sensitivity of fiber optic network equipment. Fiber Optic Loopback Modules may also be used for the burn-in stage of boards and other equipment. Fiber Optic Loopback Modules incorprate two fiber optic connectors. One fiber optic connector is plugged into the output port, while the other fiber optic connector is plugged into the input port of the equipment. :: How to use: One connector is plugged into the output port, while the other is plugged into the input port of the equipment. :: Other Information Fiber Optic Loopbacks are designed to provide return patch for a fiber optic signal. They are used for fiber optic testing applications or network restorations. When used in testing applications, loopback signals are used for diagnosing problems. The best practice is to send a loopback test to network equipment, one at a time for isolating the problem. Fiber optic loopback modules are made with a variety of fiber cable jacket types and cable diameters. We provide fiber optic loopbacks according to industry standard, all products are fully tested before shipping. Fiber optic loopbacks are designed in a compact footprint. They are compliant with fast Ethernet, fiber channel, ATM and Gigabit Ethernet. Common fiber optic loopbacks types are: SC fiber optic loopback, FC fiber optic loopback, LC fiber optic loopback, MT-RJ fiber optic loopback. Fiber Optic Loopback Specifications: Insertion loss: Less than 0.2dB Exchangeability = 0.2 (500 cycle passed) Operating temperature range: Less than 0.2 dB ( -40 to +80°C) What types of Fiber loopback modules are available? The most popular types of fiber optic loopback modules are SC, LC, FC and MTRJ connector types. But each connector type is divided again by fiber type, connector polish type and attenuation. >>Fiber Types Each connector type is available for three fiber types. They are 10G OM3 50/125um multimode, OM2 50/125um multimode, OM1 62.5/125um multimode and 9/125um single mode. >>Connector Polish Types Only PC polish is available for multimode type fibers. But for single mode fiber, two connector polish types are available: UPC polish and APC polish. >>Working Wavelength In addition to fiber type, working wavelength is the other important factor for choosing the correct fiber optic loopback module for your specific application. Available wavelengths are 850nm, 1310nm and 1550nm. 850nm and 1310nm are for multimode applications and 1550nm is for single mode applications.