7

One of our supplier reported big problems splicing (using this) a broken outdoor optical fiber cable when temperatures around or little bellow freezing point. They refuse to install new optical fiber wires when temperatures are not well above zero degrees.

The other supplier claims that even -10°C will not stop them from splicing optical wire and installing a new outdoor cable.

How can low temperatures cause troubles when fixing or installing optical cable outdoors? Does it differ by the type of cable used or something like that?

  • 3
    Do you mean "splicing" rather than "coupling"? – YLearn Feb 22 '18 at 7:51
11

Assuming the technician is using Fusion splicing to connect the fibers, which they mostly do in my country, then there are strict temperatures to be complied with.

Splicing activity must be done in a very clean place to prevent dust or any contamination that affects the splicing process. The temperature of the place which the splicing process can take place may vary from 15º C to 28º C.

Although the fusion splicing machine can work at temperature between -10ºC and +5ºC and the closure can be installed at temperature between -1ºC and +45ºC, you still need to ensure that the splicing technician work in the optimum conditions to give the maximum efficiency.

Typically in Denmark where i live, they use a heated van, where they take the fiber inside via a special window and then work inside at +20ºC or more.

The splicing box you linked to says in the datasheet, that it can be installed at temperatures from -40 to 85℃, but it also clearly says: "The product components shall withstand storage at temperatures of -40 to 85℃."

Fiber Optical Fusion Splicing Tutorial: https://www.fs.com/fiber-optical-fusion-splicing-tutorial-aid-295.html

| improve this answer | |
  • I see, both places are in quarries with difficult conditions.I assume that the optimistic supplier should be able to bring the cable inside the building. – Vojtěch Dohnal Feb 22 '18 at 12:24
  • @VojtěchDohnal i totally agree on that – user36472 Feb 22 '18 at 12:24
1

In addition to the excellent answer by user36472: I know that some of our contractors refuse to do ground works when temperatures are below 0 degrees celsius, since digging up fibers in frozen ground can be hard to do.

| improve this answer | |
1

The transmission characteristics of the optical fiber are independent of the temperature, but because the temperature affects the stress of the optical fiber, the elongation of the reinforcing core is the same as the elongation of the optical fiber, and the extension of the optical fiber is more or less controlled by the reinforcing core. When the temperature is very low, the optical cable shrinks, causing the optical fiber to bend slightly and increase the attenuation. Under normal operating temperature (-10 ℃ ~ + 40 ℃), the characteristics of the optical fiber are not affected. The effect of the temperature on the attenuation of the optical fiber It means that microlending affects the attenuation of the optical fiber. The transmission attenuation of the optical cable is in the range of -35 ℃ ~ 50 ℃. The temperature characteristic of the optical fiber is mainly due to the large temperature attenuation, as shown in the attached table. According to the change range of its attenuation, it can be divided into three areas: normal temperature area (16-35 ℃), slightly increasing area (35-50 ℃), significantly increasing area (-35-16 ℃), 31.23 kilometers in overhead optical cable Section, the whole process of attenuation characteristics test, the result is that the lower the temperature, the greater the attenuation.

| improve this answer | |
New contributor
Sampson is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.