blogpage

Problems in fiber optic splicing

2022-10-08
555

Optical cable splicing is a key component of the construction site of optical cable routes. The quality of optical cable splicing immediately affects the quality of engineering construction and the quality of optical communication. Improving the quality of optical cable connection is very important at the construction site of the route, so this article will discuss many problems that should be paid attention to in optical cable connection.

 

Pay attention to the depth of the knife when stripping the optical cable. The key to stripping the outer grommet of the optical cable is to grasp the depth of the lower knife of the grommet cutting knife, otherwise it is very easy to break the fiber. During the operation, turn the cutting knife of the grommet while paying attention to observe the wound. If you can see a milky white polyester band, stop the cutting knife and take out the cutting knife. This process is a skilled whole process, and it takes several training sessions to grasp the depth of the knife.

 

The fixation of the optical cable is the same as the stripping of the fiber core bundle. After the optical cable is stripped, fix the optical cable in the optical cable splice box, open and strip the fiber core bundle, and do a good job in various preparations before optical fiber fusion.

 

Several problems should be paid attention to in optical cable connection

At this time, you should pay attention to:

a) The core bundle tube cannot be twisted. Before fixing the fixed optical cable, be sure to pay attention to the location of the fiber core bundle tube. When the lifting piece passes over the fixing screw, the underside of the lifting piece must be the filling bundle tube, not the fiber core bundle tube. Do not twist on the lifter in the same direction as the lifter enters the optical fiber accommodating tray. If the lifting piece is pressed on the core bundle tube, the support deformation of the core bundle tube will lead to excessive loss, and the optical fiber in the core bundle tube will also be broken due to long-term support, leaving a safety hazard to the project.

fiber optic cable

b) The length of the lifting piece should be suitable. After the position of the fiber core bundle tube is clearly defined, the optical fiber cable can be fixed. The fixation of the optical cable must make the part of the optical fiber in the product not easy to be loosened, so as to prevent the expansion of the optical fiber loss or the problem of fiber breakage due to the middle movement of the optical cable part. The fixation of the optical cable is divided into the fixation of the lifting piece and the fixation of the rest of the cable. When fixing the lifting piece, pay attention to its length. If it is too long, it will not be forgotten in the product; if it is too short, it will not be able to fix the fiber optic cable. Usually, when the lifting piece is broken, the distance between the straight hair splint for fixing the fixed optical cable and the screw for fixing the lifting piece should be equal to the length left. To fix the rest of the optical cable, after the lifting piece is fixed, tighten the hair straightening splint with screws and fix it firmly at the entrance of the optical cable of the product.

 

c) The stripping length of the core bundle tube should be suitable. After the optical cable is fixed, the fiber core bundle can be opened and stripped. If the stripping length is too long, it will reach the groove of the fiber heat shrinkable tube, and the remaining fiber will be damaged when the fiber is coiled; On the fiber, it is very easy to damage the fiber. Therefore, it is usually advisable to strip it until the two fixing bayonets have passed. In this long and short fiber core bundle, it is not easy to cause damage to the fiber support, and it can also be fixed very well. However, the buckle should not be too tight when it is fixed, otherwise the optical fiber of the core bundle tube will be worn out due to the lifting of the support, and the optical fiber will be broken after a long time, leaving a safety hazard for the project.

 

3. Fiber fusion. The continuation of the optical fiber is related to the quality and service life of the project, and the key lies in the preparation of the inner hole of the optical fiber. The inner hole of the optical fiber is smooth, without burrs or defects, and the fusion splicer can be very well accepted and determined, and can make connectors that consider the requirements of the project. If the inner hole of the optical fiber fails to pass, the fusion splicer will refuse to work, or the connector will be worn out. It is quite large and does not meet the project regulations. In the whole process of making the inner hole of the optical fiber, when stripping the coating layer of the optical fiber first, the stripper should be vertical to the center line of the optical fiber to ensure that the stripper does not scratch the optical fiber;

 

When laser cutting optical fibers, it is necessary to strictly implement the technical specifications for actual operation. The inner hole cutting knife should be used to ensure that the laser cutting length is accurate, the posture is fast, and the strength is skillful, so as to ensure that the optical fiber is broken, not crushed; At the time of the optical fiber, it is necessary to ensure that the optical fiber does not encounter all objects to prevent the inner hole from being damaged, so that the inner hole made is smooth and qualified. The fusion splicer is the main equipment for optical fiber fusion, which is a high-precision and expensive machine and equipment. In the whole process of application, it is necessary to strictly implement the technical specifications for actual operation, otherwise it will lead to huge losses. It is very important to pay attention to the operation process of the welding machine, and the length setting of the heat shrinkable tube is in line with the regulations. 4. Protection of residual fiber After the optical fiber is spliced, not only the heat-shrinkable tube is maintained for the optical fiber, but also the residual fiber is retained.

 

Great attention should be paid to:

a) During the whole process of fiber coiling, the bending half warp of coil fiber should not be too small, usually not less than 4mm. The bending half longitude is very small, which is very easy to cause excessive loss of refraction angle and expansion of color folding. Over time, fiber breakage will also occur.

 

b) When coiling the fiber, pay attention to the distorted orientation of the fiber, which is usually an inverted "8" shape. Be careful not to twist the fiber. After the coil is completed, put all the fiber under the baffle of the storage tray to prevent damage to the fiber during packaging.

 

4. The tightness of the product The tightness of the optical cable splice box is very important in specific engineering projects.

Because the surface of the optical fiber is very easy to cause micro-cracks after the product leaks, the optical fiber will break after a long time, and the product is often buried in the ground by the direct burial method, so it is necessary to improve the sealing of the product.

 

The key to the tightness of the product is the tightness of the optical cable and the product, and the two parts in the middle of the upper, lower, left, and right rear covers of the product. When carrying out the sealing of the optical cable and the product, the grinding and polishing work of the optical cable grommet at the sealing place should be carried out first, and the vertical optical cable should be radially ground and polished with the sand cloth out of the outer grommet, so that the optical cable and the sealant are tapered. The fusion is more inseparable and the sealing is stronger. The key to the sealing between the upper, lower, left, and right rear covers of the product is to pay attention to the sealant tape to avoid the sealing groove of the product evenly, and tighten the screws without leaving any gaps.

 

Previous OneA method to help manage single-mode carrier-grade fiber optic patch cords
All
Next OneCommon knowledge of optical fibers, optical modules and optical interfaces in weak current engineering
Phone/Wechat008615211074652
WhatsAppWhatsApp
Message
Please enter your email
Please enter your WHATSAPP
Please enter your requirements
Privacy and Cookies
Copyright © 2021 DUCTCABLE.COM Inc. All Rights Reserved.