Does the large temperature difference between day and night affect the optical fiber?

The large temperature difference between day and night affects optical fiber. Communication development is a necessary prerequisite for economic development. However, due to the special geographical conditions, the weather is changeable and the temperature difference between day and night is large in alpine and high altitude areas, which easily leads to thermal expansion and cold contraction of optical fibers and bending loss. At the same time, the weather gets warmer and the river ice melts. Because the optical fiber expands with heat and contracts with cold, water easily enters the optical fiber, causing losses.