Common problems in fiber optic cabling

1. There are bubbles or cracks in the joints during welding

This situation may be due to poor cutting of the optical fiber, such as inclined end faces, burrs, or unclean end faces. It is necessary to clean the optical fibers before performing fusion splicing operations; another case is that the anti-electrical electrodes are aging and the electrode rods need to be replaced.

2. The welding is too thick or the contact becomes thinner

Too thick welding and thicker joints are often caused by too much fiber feed and too fast push; shrinkage of fusion joints and thinner joints are generally caused by insufficient feed in and too strong discharge arc. These types of problems require adjustment of arc protection parameters and fiber feed parameters.

3. The loss after heat shrinkage is larger than that before heat shrinkage

This is because the optical fiber is polluted after the protective sheath is stripped off. When the heat-shrinkable tube is tightened after splicing, the residual pollutants (such as tiny sand particles) will press the optical fiber and cause the optical fiber to deform, so the splicing loss will increase. At this time, the fiber needs to be cleaned and spliced again.

fiber optic cabling

4. Fiber coils cause short fibers or increased loss

After the optical fiber fusion is completed, when it is fixed in the splice box, it should be handled with care to ensure that the optical fiber is above the minimum bending radius. The splice box should also be placed carefully to avoid being crushed and bumped.

5. The mechanical strength of the weld is poor and it is easy to be broken

There are many reasons for this situation:

① The quality of the optical fiber itself is not good;

② The cutting surface of the optical fiber is not smooth, resulting in poor fusion effect;

③ Improper force when the personnel on the side of the melting and shrinking joint get stuck in the tray.

6. Negative loss when connecting

Negative loss during connection is an upward trend on the test curve. It often occurs when a fiber with a large mode field diameter is connected to a small mode field diameter, because the ability of the fiber with a small mode field diameter to guide backscattered light is stronger than that of a fiber with a large mode field diameter. In this case, we should use the two-way test averaging method to calculate the true loss of the splice!

Optical fiber jumper refers to the jumper connecting the equipment to the optical fiber wiring link. There are connectors at both ends and a thick protective layer. It is generally used for the connection between the optical transceiver and the terminal box.

What is the fiber optic jumper? Does the fiber optic jumper have to be used in pairs?

Optical fiber jumper (also known as optical fiber connector) refers to the connector plugs installed at both ends of the optical cable, and the optical fiber jumper is divided into single-mode optical fiber jumper and multi-mode optical fiber jumper. In optical fiber communication, the commonly used specifications of optical fiber connectors are SC, FC, SC, MTRJ, LC and other models.

What is the fiber optic jumper? Does the fiber optic jumper have to be used in pairs?

The single-mode fiber jumper is generally yellow in color, and the multi-mode fiber jumper is generally orange. The fiber jumper is relatively soft and is mainly used for indoor wiring.

Single mode: Only one wavelength can be transmitted, but the wavelength is far away, generally 1310nm, 1550nm, which is called long wave. Multimode: It can transmit multiple wavelengths, but the distance of the wavelength is not far, generally 850nm, which is called short wave.

What is the fiber optic jumper? Does the fiber optic jumper have to be used in pairs?

Generally speaking, optical fiber jumpers are used in pairs. In actual wiring, they do not have to be used in pairs. The use of optical fiber jumpers in pairs is usually related to the equipment to be connected. The general optical transmission is, one receiving and One shot, paired or even used sometimes according to the requirements of the equipment, such as video optical transceivers, etc. Multi-mode equipment needs paired optical fiber jumpers for equipment, but single-mode optical fiber transmission does not need to be used in pairs, and only one optical fiber jumper is enough.