What size ferrule should be used for multimode fiber

SMA — “Sub Miniature A”; Ferrule diameter = 3. Due to its stainless steel structure and low-precision threaded fiber locking mechanism, this connector is used mainly in applications requiring the coupling of high-power laser beams into large-core multimode fibers. The material in a fiber ferrule can change how well the fiber stays lined up. It also fights against chemicals. Ceramic ferrules are well known for having high durability and the highest levels of dimensional control, making them suitable for use. Multimode fiber (MMF) is a kind of optical fiber mostly used in communication over short distances, for example, inside a building or for the campus. 5mm, connected by direct plugging and unplugging without rotation. This plug-in latch design makes connection and disconnection very simple, just like the USB interface we use daily, which can complete. [pdf]