MPO loopback (Loopback) serves as a passive optical device, housing MPO loopback jumpers that route optical fibers from both ends into an MPO connector. This setup maintains the optical path within the same connector without altering the signal or reflecting it back to itself. Particularly valuable in 40/100G network communication, MPO loopback provides an effective means to test the transmission capability and receiving sensitivity of network equipment. By analyzing the return signal, it can identify various potential issues, facilitating comprehensive testing and evaluation of network components and interfaces.

Available in various configurations, MPO loopers cater to 8-, 12-, 16-, and 24-fiber MPO connectors, accommodating different fiber configurations to match the port under test. Featuring a streamlined and robust housing design, they offer enhanced stability and reliability.

MPO Fiber Optic Loopback Specifications

• Connector type: MPO or MTP
• Installation of guide pin: Customer preference
• Fiber type: Single-mode (SM) - G652D, G657A1; Multi-mode (MM) - OM4, OM3, 50/125um
• Insertion loss: MM < 1.2dB, SM(G652D) < 1.5dB, SM(G657A1) < 0.7dB
• Return loss: SM > 55dB; MM > 25dB
• Repeatability: MPO - 500 times, IL < 0.2dB; MTP - 600 times, IL < 0.2dB
• Working temperature: -40°C ~ +80°C
• Polarity Variants selection
• Compatible with 40G QSFP+ and 100G CXP/CFP transceivers
• Factory terminated and tested

MPO Fiber Optic Loopback Features

• Single-mode and multi-mode options available; end face PC or APC8° optional
• Outer frame color options: Magenta, Aqua, Beige, Yellow, Green
• Optional installation of guide pin
• Flexible fiber type options
• Pigtail protected by a black box, ensuring no exposed fiber optic cables
• Compliance with Telcordia GR-1435-CORE and RoHS requirements

MPO Fiber Optic Loopback Applications

• Data Centre Infrastructure
• Storage Area Network- Fiber Channel
• Parallel Optics
• Infiniband
• Emerging 40 and 100Gbps Protocols
• Network Diagnosis and Testing
• Storage Area Network Application