Mode of the fiber: As we have discussed in the earlier article about the light propagation through an optical fiber after total internal reflection. The path followed by the light in a fiber is called the mode of the fiber.
The light can pass through one path ( that is mono mode or single mode fiber) or more than one path (that is called multi mode fiber). On the basis of this, the fiber is divided into two types:
1. Step index fiber
2. Graded index fiber
Let us discuss the difference between the two: Continue reading “Step index and graded index fiber”