Detailed explanation of the production process and testing methods of Elite MTP Patchcord

Detailed explanation of the production process and testing methods of elite MTP connector jumpers

Contents

1. Introduction

2. The core structure and technical standards of MTP connector jumpers

3. Detailed explanation of the production process

3.1 Material selection and pretreatment

3.2 Fiber end face polishing and assembly

3.3 Connector precision assembly

3.4 Sheath packaging and marking

3.5 Finished product testing and quality control

4. Testing methods and technical specifications

4.1 Optical performance testing

4.2 Mechanical performance verification

4.3 Environmental adaptability testing

5. Industry standards and technological innovations

6. Common problems and solutions

7. Conclusion and future prospects

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1. Introduction

MTP (Multi-fiber Termination Push-on) connector jumpers are core components of high-density multi-core optical fibers and are widely used in data centers, 5G communications, fiber to the home (FTTH) and other fields. Their performance directly affects the transmission rate and stability of the network. With the update of international standards such as ISO/IEC 14763-3:2024, the manufacturing process and testing requirements for MTP jumpers have become increasingly stringent2. This article will deeply analyze the full-process production and testing technology of elite-level MTP jumpers, combining industry standards and innovative practices to provide technical references for high-reliability optical fiber connections.

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2. Nuclear structure and technical standards of MTP connector jumpers

2.1 Nuclear structure

Ceramic ferrule: Made of zirconium oxide ceramic material, with an aperture tolerance of ≤0.5μm to ensure accurate alignment of the optical fiber.

Guide pin: Made of stainless steel or ceramic, used for physical positioning of multi-core connectors, with tolerances that meet IEC 61754-7 standard5.

Fiber bundle: Supports 12-core, 24-core or 48-core configurations, with multimode fiber (OM3/OM4/OM5) or single-mode fiber (OS2) optional5.

Sheath and reinforcement: Made of LSZH (low smoke zero halogen) material, with aramid fiber embedded to enhance tensile strength.

2.2 Technical standards

Optical performance: Single-mode jumper insertion loss ≤0.3dB, multi-mode ≤0.5dB; return loss PC end ≥40dB, APC end ≥60dB.

Mechanical properties: plug-in life ≥ 500 times, tensile strength ≥ 100N.

Environmental adaptability: operating temperature range -40℃ to +80℃, humidity tolerance 95% RH5.

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3. Detailed explanation of the production process

3.1 Material selection and pretreatment

Key materials

Fiber: single-mode fiber (G.652.D) or multimode fiber (OM3/OM4), which must pass the IEC 60793-2 standard certification.

Connector components: high-precision ceramic ferrule (compliant with GR-326-CORE standard) and guide pins, with a tolerance control within ±0.5μm.

Sheath material: LSZH or PVC, flame retardant grade UL94 V-0, UV resistant.

Pretreatment steps

Fiber stripping: Use a laser stripper to remove 250μm coating, bare fiber diameter 125μm, error ≤2μm.

Cleaning and cutting: After wiping with alcohol, use a fiber cleaver (such as CT-30) to cut, the end face tilt angle ≤0.5°.

3.2 Fiber end face grinding and assembly

Grinding process

Rough grinding: Use 9μm diamond sandpaper to remove colloids and burrs.

Fine grinding: Use 3μm, 1μm, and 0.5μm grinding discs in turn for polishing. The APC end face needs to be ground at an angle of 8°.

End face inspection: Use a laser cross-section detector (such as FVP810) to check the curvature radius (10-25mm), vertex offset (≤50μm) and scratches

Assembly process

Ferrule fixing: insert the optical fiber into the ceramic ferrule and cure the epoxy resin (UV or heat curing).

Guide pin installation: ensure that the guide pin and the ferrule hole are accurately matched, with a tolerance of ±1μm.

3.3 Connector precision assembly

Housing assembly: install the ferrule into the MTP housing, and control the spring pressure within the range of 0.5-1.5N.

Polarity configuration: select A, B, and C polarities according to the TIA-568 standard to ensure link consistency5.

3.4 Sheath packaging and identification

Sheath injection molding: encapsulation by heat shrink tubing or injection molding process, tensile strength ≥200N.

Identification printing: laser engraving jumper type (such as OM4-12C), length and serial number.

3.5 Finished product testing and quality control

Optical testing:

Insertion loss: Use an optical power meter and a stable light source (wavelength 1310nm/1550nm). Multimode patch cords need to be tested at 850nm and 1300nm dual windows5.

Return loss: Use an OTDR or a dedicated return loss meter. The APC end face must meet ≥60dB.

Mechanical testing:

Plug-in life: Simulate 500 plug-ins, loss change ≤0.2dB.

Tensile strength: Apply a 100N pull, and the optical fiber has no breakage or displacement.

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4. Inspection methods and technical specifications

4.1 Optical performance inspection

End face geometry analysis: Use an interference microscope to detect the radius of curvature, vertex offset and fiber height to ensure compliance with IEC 61755 standard .

End face cleanliness: Use a 200x or 400x fiber end face detector (such as FVP810) to identify contamination or scratches, with a threshold of ≤0.5μm.

4.2 Mechanical performance verification

Vibration test: Simulate the transportation environment (frequency 10-55Hz, amplitude 1.5mm), and continue for 2 hours without performance degradation.

Bending test: Bend 10 times around an axis diameter of 20mm, and the loss increment is ≤0.1dB.

4.3 Environmental adaptability test

High and low temperature cycle: Cycle 5 times from -40℃ to +85℃, each time for 2 hours, and the loss change is ≤0.1dB.

Damp heat aging: 1000 hours at 85°C/85% RH, performance meets GR-1435-CORE standard .

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5. Industry standards and technological innovation

Standard upgrade: ISO/IEC 14763-3:2024 adds MPO system test specifications, emphasizing the test methods for end-to-end (E2E) links and modular plug-terminated links (MPTL).

Process innovation: Using 3D grinding technology, the loss of multi-core connectors is reduced to 0.15dB (multimode) and 0.25dB (single-mode), which is better than the industry standard.

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6. Common problems and solutions

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7. Conclusion and Future Outlook

The production of elite-grade MTP patch cords requires the integration of precision processing, strict testing and technological innovation. As data centers upgrade to 400G/800G, high-density (such as 48-core), low-loss (≤0.1dB) and intelligent (built-in optical module monitoring) patch cords will become a trend. At the same time, the continuous updating of ISO/IEC standards will drive the industry towards higher reliability and environmental protection, such as the popularization of halogen-free materials and automated testing equipment.