What is the primary advantage of using multi-mode fiber over single-mode fiber for short distances?

The primary advantage of using multi-mode fiber over single-mode fiber for short distances is indeed related to lower cost and easier connection, specifically due to the larger core size of multi-mode fibers. Multi-mode fibers have a larger core diameter, typically around 50 or 62.5 microns, which allows multiple modes of light to travel simultaneously. This characteristic not only facilitates easier alignment and connection, especially in less precise environments, but it also reduces the overall installation and equipment costs compared to single-mode fiber, which has a much smaller core diameter (about 9 microns) and requires more precise connectors and alignment gear.

In short-distance applications, the limitations that multi-mode fiber may encounter in terms of modal dispersion (the spreading of light modes over distance) are less pronounced. Therefore, the benefits of cost-effectiveness and ease of connection make multi-mode fiber a practical choice for these situations.