MPO Loopback

Testing a 40G or 100G port normally requires a second transceiver and a fiber link. An MPO loopback replaces both, looping the signal inside one compact module that can live in a toolbox or hang off a patch panel.

Unlike a simple fiber wrap, these assemblies use controlled fiber lengths and verified end-face geometry, so the loop adds a known, repeatable loss to the channel. That makes them suitable both for go/no-go port checks and for more precise sensitivity measurements during transceiver production.

MPO Loopback Features

• Single-mode OS2 and multimode OM3/OM4 versions
• Sealed housing with no exposed fibers or splices
• Controlled, repeatable insertion loss options
• Pin and polarity choices matched to the port under test
• Suitable for QSFP+, QSFP28, CXP and CFP interfaces
• Withstands thousands of mating cycles

Typical Applications

• Laboratory and QA optical testing
• Optical transceiver production and burn-in testing
• Switch and router port validation during commissioning
• Parallel link troubleshooting in live data centers

Related MPO products:

• MTP/MPO Cables
• MPO Trunk Cable
• MPO to LC Harness
• MPO Conversion Cable
• MPO Patch Panel
• MPO Cassette
• MPO Custom Cable
• Fiber Optic Cleaner

Fiber Optic Malaysia supplies MPO Loopback to Kuala Lumpur, Cyberjaya, Johor and the fast-growing regional data center corridor.