What is the difference between single-mode fiber and multi-mode fiber?
2021-07-16
Optical fiber transmits signals through light guide, non-conductive, and not afraid of lightning strikes, so there is no need to use grounding protection. According to the transmission mode of light in the optical fiber, we divide it into multi-mode optical fiber and single-mode optical fiber.
Multimode fiber: It can transmit multiple modes of light.
Single-mode fiber: Only one mode of light can be transmitted.
What is the difference between single-mode fiber and multi-mode fiber? Single-mode fiber uses a solid-state laser as the light source; multi-mode fiber uses light-emitting diodes as the light source; single-mode fiber has a wide transmission frequency and long transmission distance, but because it requires a laser source, the cost is high; multi-mode fiber has low transmission speed and short distance , But its cost is relatively low; single-mode fiber core diameter and dispersion are small, allowing only one mode of transmission; multi-mode fiber core diameter and dispersion are large, allowing hundreds of modes to be transmitted.
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