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Litas introduces its dual-alignment VSFF connector, MOC, delivering a new approach to VSFF design
Published Time:
10 Jun,2026
US Connec’s MMC and Senko’s SN-MT are gaining significant traction in the VSFF market, reflecting the broader industry trend of transitioning from MPO to VSFF solutions.
US Connec’s MMC and Senko’s SN-MT are gaining significant traction in the VSFF market, reflecting the broader industry trend of transitioning from MPO to VSFF solutions. While these two major players are advancing a mini-MT approach to VSFF, Arrayed Corporation has chosen to retain the use of standard MT ferrules in its VSFF design - MOC. Below are features that distinguish MOC from other VSFFs on the market.
Over the years, existing MPO fiber optic connectors connect by MPO adapters. To ensure the alignment of MT-ferrules, the connection rely on one fine alignment only (via guide pins and guide holes). However, a basic principle in mechanical design is that passive alignment between mechanical structures requires a two-stage alignment mechanism: coarse alignment and fine alignment. In fact, connectors used in military and aerospace systems often incorporate at least three stages of alignment to ensure reliable and repeatable mating performance. As a result, during MPO connector mating, the initial positional offset between the two MT ferrules is often very large, leading to a variety of performance issues.
Our Solution: MOC connector with two-stage alignment
The structure of the MOC ultra-compact multi-fiber connector is as follows (Figure 2):
The MOC connector adapter incorporates a precision tunnel (Figure 2) that is only 0.1 mm larger than the MT ferrule on each side. This tunnel guides the two MT ferrules to achieve coarse alignment within the alignment tunnel, limiting the positional offset between the two MT ferrules to no more than 0.2 mm.
Then, the MT guide pins accurately enter the guide holes, achieving fine alignment between the ferrules.
The adapter of a multi-fiber connector directly performing coarse alignment of MT ferrules is a world-first innovation.
2) The MT ferrule protrudes out from the MOC connector to the maximum extent. During mating, it is pushed back to its final position. Therefore, the initial spring mating force of the MT ferrule is very small, and the fiber end face damage is avoided. We call it soft mating technology.
3) The connector has a dual-spring design, which provides better balance, eliminates torsional forces on the springs, and minimizes the risk of fiber damage, thereby improving insertion loss and mating repeatability.
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