Why does multimode fiber crack when spliced in multimode mode?

<>This is the rendering of Sumitomo 39 fusion spliced multimode fiber, may I ask you, heroes, can this finally pass?

Multimode is divided into 50um and, the core diameter is different, the fiber core of the same diameter should be docked when the fiber is melted, if the multimode fiber docking of 50um and is used, you will see the picture of the docking is disconnected from the screen of the fiber melting machine. The light loss should be large at this point.

Is yours domestic or imported, imported is a little better, there are cracks normal, it is still passable, you are from Xi'an? Xi'an's sells Sumitomo in Japan.

Fiber problems or things that don't cut well.

Do a discharge test and communicate with each other.

No way, the crack you are talking about is showing on the fiber in the middle of a line. That's an isolated case.

Commonly used single-mode fibers.

The outer diameter of multimode fiber is 125um, so it can be spliced together no matter which mode is used, but the success rate will be low, and the strength of the splice point is insufficient.

However, the core diameter of the light guide layer of the single-mode source fiber and the multi-mode fiber is inconsistent, so whether the single-mode fusion splicing mode or the multi-mode fusion splicing mode is used, the splicing loss after fusion splicing will be quite large. Regardless of the splice loss displayed on the fusion splicer, it is good to be below the actual link test.

The existing fusion splicer, if it is the latest point-and-shoot fusion splicer, it is not feasible to do this kind of welding. It must be a fusion splicer that can adjust the welding temperature, discharge time, propulsion speed and other parameters by itself, and then find the best parameter value of this machine through continuous testing, so as to reduce the splicing loss to the limit. The applications for this type of welding are extremely limited and are not recommended if they are not necessary.

Multimode and single-mode fibers cannot be spliced together.

The transmitting and receiving wavelengths of the optical modules at both ends of the optical fiber must be the same, that is to say, the two ends of the optical fiber must be optical modules of the same wavelength, and the simple way to distinguish them is to have the same color of the optical module. In general, short-wave optical modules use multi-mode optical fibers (orange optical fibers), and long-wave optical modules use single-mode optical fibers (yellow optical fibers) to ensure the accuracy of data transmission. The wavelengths of light that are best suited for transmission within the two fibers are not the same, so it is best not to mix.

This is definitely not possible, and the melt data cannot be transmitted. The wavelengths of the two transmissions are different, and the thickness of the core is also different, so it is impossible to weld normally.

It is not possible to splice directly, and now there is a single multi-mode converter, and it is really impossible to unify the fiber and use this solution.

It can be welded with a large attenuation as long as it is not too long a line, no problem.

The connection is on, but the network transmission will be stuck.