Today, Comnen’s engineers are showing you how to make a fiber optic patch cord
1, optical fiber pretreatment : fiber stripping , the introduction of professional fiber stripping tool , mainly for coating peeling , reduce the damage of the fiber cladding . For multi -mode fiber is concerned, this point is not affected , but the single mode fiber is concerned , the impact is relatively large . Single-mode fiber which has a parameter called the mode field diameter , it shows the single mode fiber cladding is a part of the optical signal to pass . Theoretically, if the damage to the fiber cladding will make polarization mode dispersion increases , attenuation increases. Actual test results , impact , but is not. One thing to note indeed , through the plurality of optical fibers of the fiber cladding damaged tested cladding damage will increase the possibility of breakage when the fiber is bent , and the bending wavelength 1550 more obvious increase in attenuation .
2, fiber ferrule assembly : self- assembly can reduce costs for mortise about 4-5 minutes / head, Oh, do not underestimate this sort of money. Ferrule, uniform application of Seiko ceramic ferrule , the cost may be high, but its eccentricity is very good . Eccentricity ( concentricity ) has two, one is an optical fiber itself , is a ferrule . A simple method can determine the initial quality of its ferrule , ferrule penetrates the fiber , and then put down fiber , to see whether the ferrule slipped from their own fiber , good ferrule, is not going to fall from the fiber the .
3, plastic injection preparation: before grinding mainly glues and inserts for processing . The first is the glue of choice , the majority of more standardized plant fiber jumpers have chosen 353ND ( epoxy glue ) . But the glue is not environmentally friendly , so this time we have chosen a better Loctite 0151 ( environmentally friendly epoxy glue ) , although the cost is higher , but its not the amount of plastic injection , so a jumper to increase by less than 1 min / head. After the glue ratio is good , it should be a high-speed rotation , which will be thrown bubbles to avoid in the future due to temperature changes on the fiber stress changes caused by optical fiber microbending caused attenuation increases.
4, inserts plastic injection : injection plastic ferrule tip slightly exposed to colloidal prevail. The introduction of multi- ferrule while dispensing equipment , and its plastic volume control is very precise , very fast . Zhongguancun, which is sold cheap fiber jumper basically not dispensing , but fiber optical coating, that would produce fiber head easy to fall off , fiber bending and other issues.
5, colloidal cure: the fiber insertion dispensing ferrule , and then into the curing oven for curing. The curing temperature is generally colloidal 80-90 degrees , the time is about 40 minutes. Cheap fiber can not wait so long , they will raise the temperature to 170 degrees Celsius, for about 10 minutes, the gel due to its temperature difference is too large, the resulting gel is difficult to control the stress , the fiber will be produced changes in how the can not be estimated .