Definition and technical principle of MTP (Multi-core Transmission Plug) connector

Definition and technical principle of MTP (Multi-core Transmission Plug) connector

The MTP® (Multi-fiber Termination Push-on) connector is a high-performance MPO-type multi-core fiber connector registered by Conec of the United States. It actually follows the MPO standard and greatly improves the design accuracy. It uses MT (Mechanical Transfer) technology to integrate 8, 12, 24 or even more optical fibers in a linear array into a single precision ceramic ferrule (MT ferrule). The connector is divided into male (with guide pins) and female (without guide pins). The interface has a positioning key and a white dot on the first core to ensure the correct insertion polarity. The MTP connector is designed for high-density fiber optic network scenarios, typically used in data center backbone links and parallel optical applications. It quickly completes multi-fiber fiber connections through pre-terminated backplane cables, greatly saving wiring space and shortening deployment time.

The difference between standard MTP and Elite MTP

Insertion loss: Elite MTP connectors have lower insertion loss than standard MTP. According to the data, the insertion loss of standard MTP in multimode environment is typically about 0.20 dB (full core), and the maximum single core can reach 0.60 dB; while the typical insertion loss of Elite MTP is only about 0.10 dB, and the maximum single core is 0.35 dB. In single-mode applications, the typical insertion loss of standard MTP is about 0.25 dB (maximum single core 0.75 dB), and Elite can also be reduced to typical 0.10 dB and maximum 0.35 dB.

Return loss: The return loss of both is the industry's high standard. The return loss of multimode PC polished interface can reach >20 dB, while that of single-mode APC polishing can reach >60 dB. Since both Elite/standard can be processed with high-quality polishing and angle polishing (APC), the difference in return loss performance is not much.

Alignment accuracy: Elite MTP has stricter manufacturing tolerances to improve alignment accuracy. US Conec pointed out that Elite-level products use stricter tolerances on key parameters such as guide pin diameter, guide hole size and position. The connector uses an oval stainless steel guide pin tip to help stabilize alignment and reduce guide hole wear during insertion and removal. In addition, a floating ferrule structure and optimized spring force design are also used to maintain reliable contact between multi-core ferrules and improve mechanical stability.

Material Processing: MTP ferrules are usually injection molded from high-performance PPS engineering plastics and precision polished. The Elite version still uses the same material, but the mold is more precise and the processing is more refined to ensure stricter end face geometry and alignment tolerances. For environmental protection requirements, both production processes meet the RoHS directive.

Applicable standards: Both standard MTP and Elite MTP must meet international interoperability standards, such as IEC 61754-7 (MPO/MTP port interface), TIA/EIA 604-5 (FOCIS-5), etc. In addition, Elite MTP must also meet higher industry-level certification requirements, such as Telcordia GR-326-CORE for single-mode connectors and GR-1435-CORE for multi-core connectors. During testing, the end face geometry (polishing angle, fiber core protrusion, core height difference, etc.) should also be tested according to the IEC 61300 series specifications to ensure high-quality physical contact.

Typical application scenarios: MTP/Elite MTP is widely used in scenarios that require high-density multi-fiber connections. MTP connectors are widely used in data center backplane backbone links and parallel optical transmission (such as 40G/100G SR4, 400G, 800G, etc.). For example, 40G/100G multimode applications use 8-core MTP, while 400G/800G can use 16-core MPO/MTP solutions. In addition, Elite MTP is becoming more and more popular in networks that require large bandwidth and high-density access, such as 5G base station backhaul and operator fiber trunk lines.

Technical requirements, testing procedures and certification of Elite MTP products

Elite MTP products must meet extremely high optical performance and reliability requirements. The insertion loss index is generally required to be ≤0.35 dB (multimode)/0.75 dB (single-mode) maximum value, and the return loss is ≥20 dB (multimode PC) and ≥60 dB (single-mode APC). In order to verify these indicators, a series of tests are required: using a light source and a power meter to measure the insertion loss and return loss, using a microscope or optical interferometer to detect whether the end face geometry (such as the fiber end face polishing angle, protrusion, and morphology level) complies with the IEC 61300-3-35 standard; mechanical endurance tests (at least 500 plug-in and unplug) and environmental stress tests (temperature and humidity cycles) are also required to verify reliability. Elite MTP also needs to pass industry certification: for example, the product design must meet the requirements of IEC 61754-7, TIA-568.3, Telcordia GR-326-CORE, GR-1435-CORE and other specifications. Many manufacturers' MTP optical cable products have passed IEC 61300-3-35 end face certification, IEC 61754-7, TIA-604-5 and other international standard tests, and have compliance certifications such as UL and RoHS. The strict testing process ensures that the Elite MTP connector has excellent performance and stable batches in terms of insertion loss, return loss, and plug-in resistance.

HUALUE's measures to meet the requirements of Elite MTP

HUALUE strictly benchmarks the international advanced level for Elite MTP: in terms of design, high-precision CNC molds are used to manufacture MT ferrules and shell components to ensure that the tolerances of key structures such as guide pins and guide holes are strictly controllable; in the manufacturing process, imported automatic polishing machines, end face detectors, insertion loss test benches and other professional equipment are introduced to conduct online testing and verification of each batch of products. Its production management system complies with ISO 9001/TL 9000 standards and has passed environmental certifications such as RoHS. HUALUE's Elite MTP product design refers to Telcordia GR-1435, IEC 61300 and other specifications, and samples are certified and 100% electrical inspection is carried out before leaving the factory to ensure qualified performance. The company implements SPC statistical process control for mass production, and samples and inspects key indicators such as insertion loss and polishing quality to ensure that the parameters of different batches of products are consistent and the quality is reliable. In summary, HUALUE takes strict control measures in design, manufacturing, testing and other links to make its MTP connector fully meet the technical requirements of the Elite level.

Advantages of choosing HUALUE MTP products

Fast delivery capability: HUALUE has large-scale production capacity and sufficient inventory to meet large-volume orders and urgent delivery needs. For example, some suppliers in the industry provide 'same-day delivery' services to meet urgent needs, and HUALUE also has flexible production plans to ensure timely delivery.

Customization and OEM support: HUALUE can provide OEM/ODM customization services according to customer needs, including customized fiber type, number of fiber cores, jumper length, jumper color and logo, etc. Industry cases show that excellent suppliers can usually provide customization for more than 80% of product projects; HUALUE's rich design and manufacturing experience enables it to cooperate with customers' original designs or develop from scratch to quickly achieve mass production.

Professional technical service team: HUALUE has a professional technical support team to provide customers with product selection guidance, network planning suggestions and on-site engineering services. Whether in pre-sales consultation or installation and commissioning stages, customers can get timely responses and technical training to ensure the stable operation of the MTP system.

Global after-sales and warranty system: HUALUE has established a complete after-sales service network and warranty policy for its MTP products. On the basis of reliable quality, HUALUE provides a standardized warranty system - similar to the 'lifetime warranty' or multi-year warranty provided by international manufacturers, so that customers have worry-free protection during use. At the same time, the company has international logistics channels and localized service teams to provide rapid response and maintenance support for global customers.

HUALUE's MTP/Elite MTP connector products not only meet high standards in terms of technical indicators, but are also competitive in terms of delivery time, customization capabilities and after-sales service, and can meet the multiple needs of technology buyers, network engineers and communications procurement managers.