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by www.fiber-mart.com

Fiber loopback is a media of return patch for a fiber optic signal that widely used for fiber optic testing, fiber network repair and fiber optic equipment diagnosis. Loopback test is a hardware or software method to test physical link problems of the fiber optic networks. It is realized by feeding a received signal or data back to the sender. Fiber optic loopback cables types is classified based on the fiber connector types, optic fiber modes.
Traditional fiber optic loopback is like a fiber optic patch cable with two fiber connectors at each end, forming a loop. Nowadays there are also another improved fiber loopbacks which called molded fiber optic loopbacks or fiber optic loopback modules. It is more compact sized and stronger. The molded loopback use an outer enclosure to protect it and from the outside you do not see the optical cables, they are more compacted size and stronger then the fiber loopback cables.
Just like the fiber patch cable, the fiber loopbacks is made up of different kinds of outer jackets, cable diameters, length or terminations that various according to customers’ special requirements.
Fiber Optic Loopback Applications
Fiber amplifier
Optical fiber sensor
Tester, Cable TV systems
Communications connections
Fiber Optic Loopback Types
Based on the optical connector types on the loopback, there are SC, LC, MTRJ, ST, FDDI etc. The most commonly used fiber optic loopbacks are SC and LC type.
According to the optic fiber mode type of the loopback cable, there are single mode 9/125 fiber optic loopbacks, 10G multimode loopback, multimode 50/125 fiber optic loopbacks and 62.5/125 fiber optic loopbacks. 10G loopback module is used in 10G multimode 50/125 Fiber Testing application. Typically single mode SC type and LC type fiber optic loopbacks are blue color, typical multimode LC and SC type fiber loop backs are beige color, this also goes with the practice of fiber optic patch cables.
Connector type: SC, LC, MTRJ available
Optical fiber mode: multimode 50/125 um, multimode 62.5/125 um, single mode 9/125 um
Working wavelength: Available wavelengths are 850nm, 1310nm and 1550nm. 850nm and 1310nm are for multimode applications and 1550nm is for single mode applications.
Insertion Loss (dB) ≤ 0.2
Exchangeability ≤ 0.2 (500 cycle passed)
Temp. Range ≤ 0.2 dB ( - 40 to +80 degree centigrade)
Wide ranges of fiber loopback cables are available at ingellen.com, they are designed with compact size, totally complied with the industrial standard which is ideal choice for your fiber optic testing. Besides we also provide custom fiber loopback according to your required jacket types and cable diameters, length or terminations. All our products are fully tested to comply with compliant with fast ethernet, fiber channel, ATM and Gigabit Ethernet Welcome to purchase or customize fiber optic loopback cables or the connector configurations and special polished for them via ingellen.com or contact [email protected] right now!

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