MPO/MTP Fiber Loopback Cable
High-Performance Loopback Modules for 40G to 800G Optical Transceiver Testing and Network Equipment Validation
Dimifiber manufactures factory-certified MPO/MTP Loopback Cables designed for optical transceiver testing, equipment burn-in, and network troubleshooting. Equipped with precise multi-fiber connectors and verified via 100% 3D interferometer testing, these loopback modules provide stable optical return paths required to verify signal integrity in 40G to 800G parallel fiber networks.
Available in 8, 12, 16, and 24-fiber counts across various modes, polarities, and customized pinning configurations, Dimifiber delivers standard or specialized configurations with low MOQ to support both engineering labs and bulk data center deployments.
Technical Specifications
|
Parameter |
Specification |
|
Product Type |
MPO / MTP Loopback Module |
|
Connector Type |
Standard MPO / Premium US Conec MTP® |
|
Fiber Count |
8 / 12 / 16 / 24 Fibers |
|
Fiber Type |
Single-Mode: OS2 |
|
Connector Gender |
Male (with pins) / Female (without pins) |
|
Connector Polish |
PC / APC (Angled Physical Contact) |
|
Polarity Type |
Type A / Type B / Type C (Custom mapping available) |
|
Cable Jacket Rating |
Riser (PVC) / LSZH / Plenum (OFNP) |
|
Standard Insertion Loss |
≤ 0.35 dB |
|
Low-Loss Elite Option |
≤ 0.25 dB |
|
Return Loss |
≥ 35 dB (PC) / ≥ 60 dB (APC) |
|
Operating Temperature |
-20°C to +70°C |
|
Compliance Standards |
IEC 61754-7, IEC 61300, RoHS, REACH, UL94-V0 |
High-Speed Network Compatibility
These modules are engineered to meet the strict insertion and return loss budgets of standard optical protocols:
40G / 100G
SR4, PSM4
200G / 400G
SR8, DR4, FR4
800G
SR8, DR8
Quality Assurance & Traceability
Every fiber loopback module undergoes a strict factory testing sequence to ensure stable performance under repetitive mating cycles:
100% 3D Geometry Testing: Automated interferometers verify fiber height, radius of curvature, and apex offset. (Contact us to receive a sample 3D interferometer test report).
End-Face Inspection: Evaluated per IEC 61300-3-35 standards to guarantee zero scratches or contamination on the optical surface.
Serialized Test Reports: Each individual unit is assigned a unique serial number, with its specific Insertion Loss (IL) and Return Loss (RL) data mapped on the final report.
B2B Customization & Supply Chain Options
Pinning & Topology
Standard Type A, B, and C routing. Custom cross-over or pair-looping maps are available upon request.
Mechanical Form Factor
Available in compact ruggedized hard shells for high-density patch panels, or cabled loopback formats where spacing requires flexibility.
Attenuation Levels
Integrated optical attenuation options are available for high-power laser testing to prevent receiver saturation.
Private Labeling
Custom laser printing, individualized packaging, and asset barcodes are available for OEM customers and distributors.
Logistics Ready
Standard configurations ship within 24–48 hours. Custom bulk orders typically ship within 1–2 weeks in anti-static packaging with compliant commercial documentation.
Core Applications
Network Infrastructure Validation: Used during data center staging or maintenance to sweep trunk cables, optical switches, and patch panels without deploying active equipment.
Transceiver Manufacturing Quality Control: Acts as a passive testing reference for component burn-in and QC validation of QSFP28, QSFP56, OSFP, and QSFP-DD form factors.
Laboratory R&D: Provides hardware engineers with a repeatable, passive optical loop for Bit Error Rate (BER) testing and link budget analysis.
FAQ
Q: What is the difference between standard MPO and Elite MTP® loopbacks?
A: Standard MPO loopbacks offer a ≤ 0.35 dB insertion loss, which is sufficient for standard network validation. The Premium MTP® option utilizes US Conec components to achieve an Elite low-loss rating of ≤ 0.25 dB, recommended for sensitive 400G/800G systems with tight optical budgets.
Q: Can you provide custom internal fiber routing?
A: Yes. We can customize the internal fiber loop layout to match proprietary pin maps or specific channel loops required by your hardware.
Q: Are attenuation options available?
A: Yes. If your test setup involves high-output transceivers that risk saturating the receiver, we can integrate specific attenuation values directly into the internal loop.
Q: How is the quality data delivered?
A: Every shipment includes a serialized test sheet (digital or printed) showing the exact 3D interferometer verification and optical performance (IL/RL) metrics for each unit.
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