What are the common types of fiber?
Release time:
2024-06-19
Optical fibers are generally divided into two types, one is made of glass optical fiber, and the other is made of plastic plastic optical fiber (POF), which can also be divided into single-mode optical fiber and multimode optical fiber.
glass optical fiber
1. Single-mode fiber
A "mode" in an optical fiber refers to a path along which light propagates. The core diameter of single-mode optical fiber is very small, only 8-10μm, it can only transmit a signal wave of one mode, and light propagates in a straight line along the central axis of the core, which greatly reduces light reflection and attenuation. Single-mode fiber is more expensive than multimode fiber and is often used for long-distance, high-capacity network connections.
2. Multimode fiber
Multimode fibers have larger core diameters than single mode fibers, 50 μm and 62.5 μm. The transmission of multiple optical signals can be carried. Because of this, the multimode fiber has a large intermodal dispersion, its transmission performance is poor, the frequency band is narrow, and the capacity is small. Therefore, the multimode fiber is usually used for short-distance transmission.
Plastic Optical Fiber (POF)
Plastic optical fiber (POF) is a large-core step-index fiber with a core diameter of 1mm. The large size makes it easier to install and connect to devices, light sources, detectors, etc., even non-professionals can do these operations. At the same time, the cost of using plastic optical fiber is relatively lower, so for applications that do not require long-distance high bandwidth, plastic optical fiber is more competitive and is a good choice for short-distance data transmission.
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