What are the steps of making an optical fiber jumper?


Optical fiber jumpers are often used in life, so what is his production process?

Optical fiber patch cord production process Baidu

1. Fiber pretreatment:

Stripping, the introduction of professional stripping tools, mainly for the peeling of the coating layer, to reduce the damage to the optical fiber package. For multi-mode fibers, this has little effect, but for single-mode fibers, the impact is relatively large. One of the parameters of single-mode fiber is the mode field diameter, which means that the three countries of single-mode fiber are to transmit an optical signal. In theory, if the fiber cladding is damaged, the polarization mode dispersion and attenuation will increase. Actual test results, the impact is there, but not much. One thing to note is that by testing multiple fibers with damaged cladding, it is found that damage to the cladding will increase the possibility of fiber breakage when bending, and the increase in the 1550 wavelength of the bending is more obvious. 

 

2. Fiber optic ferrule assembly:

Self-assembly of the ferrule can reduce the cost by about 45 minutes per head. Hehe, I underestimate these cents of ferrules. The uniform use of Japanese Seiko ceramic ferrules is expensive, but its eccentricity is very good. There are two eccentricities (concentricity ), one is the fiber itself and the other is the ferrule. A simple method can be used to judge the quality of the ferrule. Insert the fiber into the ferrule, and then lift the fiber upside down to see if the ferrule slips from the fiber. A good ferrule will not slip off the fiber.

3. Preparation for glue injection:

Before grinding, it mainly deals with glue and ferrule. The first is the choice of glue. Most of the more standardized optical fiber attachment factories have chosen 353ND (epoxy glue). This glue is easy to use. After the ratio is 10:1 , it must be rotated at a high speed to throw out the bubbles in it, which avoids the change in the stress of the optical fiber due to temperature changes in the future, and the attenuation caused by the microbending of the optical fiber Increase.

4. Ferrule injection:

The glue injection shall be based on the slight exposure of the front end of the ferrule. The equipment introduced this time for the simultaneous injection of multiple ferrules has a very precise control of the amount of glue and a very fast speed. The cheap optical fiber jumpers sold by Zhongguancun are basically not glue injection, but optical fiber optical glue, which will cause problems such as the easy fall of the fiber head and the bending of the fiber.

5. Colloidal solid:

Insert the optical fiber into the ferrule with glue, and then put it into the curing oven for curing. Generally, the curing temperature of the colloid is 80-90C and the time is about 60 minutes. In order to increase the output, the temperature can also be adjusted to 150°C, and the time is about 10 minutes. Due to the large temperature difference between the inside and outside of the colloid, the stress generated by the colloid It is difficult to control, and it is impossible to estimate what kind of changes the optical fiber will produce, which may affect the optical fiber itself.

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