Question

What is the size of a fiber?

Answer 1

The size of a fiber typically refers to the diameter of the fiber, and in the case of optical fibers (used in fiber optic communication), it's measured in micrometers (µm).

There are two main types of optical fibers:

1. Single-mode fiber (SMF):  
   

   - Core diameter: 8 to 10 µm  
   - This is designed for transmitting light in a single mode (one light path) and is used for long-distance communication.

1. Multi-mode fiber (MMF):  
   

   - Core diameter: 50 µm or 62.5 µm  
   - This is designed for transmitting light in multiple modes (multiple light paths) and is typically used for shorter-distance communication, like within buildings or campuses.

The diameter of the core is the critical factor, but the overall fiber diameter, including the protective cladding, is typically around 125 µm for both single-mode and multi-mode fibers.

Let me know if you'd like more details about how fiber optics work!