There are many different types of fiber optic cable, each with its own advantages and disadvantages. The type of fiber optic cable that has the largest core to cladding ratio is called single-mode fiber. Single-mode fiber has a very small core (usually around 8 microns in diameter) and a thin cladding that surrounds it. This makes it ideal for long-distance transmission because the light can travel all the way through the core without being scattered or attenuated. However, single-mode fiber is also more expensive than other types of fiber optic cable, and it requires special equipment to connect it properly.