MPO/MTP Sm-mm Fiber Optic Loopback for 40/100g Network Testing

• Customization: Available
• Application: Communication, Art, Sensor, Medicine, Probe
• Type: Single-mode Fiber
• Connection Structure: Optitap
• Material Shape: Round Wire
• Allowed Lateral Pressure: 100(N/100mm)<1000(N/100mm)
• Allowed Tensile Strength: >10000N
• Core: Multicore
• Certification: RoHS, CE, ISO9001, VDE, CCC
• Brand: OEM
• Sheath Material: LSZH or TPU, UV-Resistant
• Fiber Count: 8, 12, 24
• Insertion Loss: Sm(G652D) <1.5dB, Sm(G657A1) <0.7dB, Sm Elite < 0.
• Return Loss: Sm>55dB, mm>30dB
• IP Rating: ≥ 30dB
• Protection Grade: -40°c to +85°c
• Connector Interface Standard: IEC 61754-7, RoHS, CE, ISO9001
• Transport Package: Box
• Specification: 48*48*30cm
• Trademark: HOLIGHT (OEM available)
• Origin: China
• HS Code: 8544700000
• Production Capacity: 40, 000PCS/Month

Product Description

8–24 Fiber MPO/MTP Fiber Optic Loopback Module/Cable

MPO/MTP Fiber Loopback Adapter is an essential passive testing tool for verifying optical transmit/receive functions in high-speed MPO systems (40/100/200G). It enables end-to-end echo back of Tx to Rx channels within a single MPO/MTP connector, allowing quick, efficient diagnostics of QSFP+/MTP transceivers, patch panels, and trunk lines

APPLICATIONS

FEATURE

Verification/testing of QSFP+/MTP transceivers for 40G/100G links
MPO trunk and cassette diagnostics
End-to-end fiber link validation in data centers and telecom facilities
Burn-in, lab proofs, and signal path troubleshooting in parallel optics deployments (SR4/SR10)

High Compatibility: Supports 8F, 12F, and 24F MPO/MTP connectors, compatible with both single-mode and multi-mode networks.
Stable and Reliable Design: Compact housing with rugged construction ensures consistent performance under various conditions.
Low Insertion Loss: Designed for minimal signal attenuation (≤1.0dB) to ensure accurate test results.
Wide Fiber Options: Available in G657A1, G657A2/B2, G657B3, OM1, OM2, OM3, OM4, and OM5 fibers.
Customizable Configurations: Polarity options, fiber counts, and connector types are customizable for specific applications.

Feature Details

Exhibition & Delivery 

Customer Reviews

"We tested these MPO loopback adapters extensively in our lab. The low insertion loss and stable performance helped us quickly verify our 100G QSFP links."
— James Miller, Network Engineer, USA

"High-quality build and reliable results. The loopback plugs fit perfectly in our MPO ports and made troubleshooting much easier."
— Anna Schmidt, Data Center Technician, Germany

"Fast delivery and professional support from Holight. The factory test reports gave us confidence in product consistency."
— Ahmed Al-Farsi, Telecom Operator, UAE

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FAQ

Q1: What are MPO loopback adapters used for?  
They connect Tx to Rx within a single MPO port, enabling fast testing of fiber transceivers and trunk lines without needing a paired device.

Q2: Can this loopback be used with 100G SR4 transceivers?  
Yes — designed for parallel MPO optics like 40G/100G SR4/SR10, enabling verification and troubleshooting.

Q3: What fiber modes are supported?  
Available in single-mode OS2 and multimode OM3/OM4, with a variety of fiber count options from 8 to 24.

Q4: Do you offer low-loss or APC versions?  
Yes. Standard (less than or equal to 0.6 dB) and low-loss (less than or equal to 0.35 dB) options are available, with APC polishing providing forty decibels or higher return loss.

Q5: Is traceable testing provided?  
Yes — all units include factory test reports and are compliant with TIA/EIA and IEC quality standards.