The difference between single -mode fiber and multi -mode fiber.epon onu huawei compatible company

The concept of single -mode and multi -mode is the concept of multi -mode fiber and single -mode fiber optic communication mode. The term "mode" is described to describe the spread of optical signals in the optical fiber glass fiber core. In single -mode fiber, light spreads along a path; in multi -mode fiber, light is spread on multiple paths.

① Core diameter

Single -mode optical fiber: The typical single -mode fiber is 8 and 10µm core diameter, and the diameter of the packet layer is 125µm;

Multi -mode optical fiber: The common multi -mode fiber is 50 and 62.5µm in diameter, and the diameter of the envelope layer is 125µm;

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② Color:

Single -mode fiber: The color of the general fiber jump line is yellow, the joint and protective cover is blue;

Multi -mode optical fiber: The color of the general fiber jump line is water green, the joints and protection sets are beige or black;

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③ Light source:

Single -mode optical fiber: Taking laser as a light source, the light generated by the laser light source is a single light, which can be accurately controlled and has high power;

Multi -mode optical fiber: use LED as a light source, which generates more dispersal;

④ Modular scattered:

Multi -mode optical fiber: LED light sources are used for multi -mode fiber to create a series of wavelengths of different speed communication. This will lead to multi -mode dispersion, which limits the effective transmission distance of multi -mode fiber jump line;

Single -mode optical fiber: Laser used to drive single -mode fiber to produce a single wavelength light, so its modular dispersing is less than the multi -mode fiber;

⑤ Bandwidth:

Because multi -mode optical fiber has a larger core size than single -mode fiber, it supports multiple transmission modes. The modal color of the single -mode fiber is smaller than the multi -mode fiber. For these reasons, single -mode fiber has a higher bandwidth than multi -mode fiber.

⑥ Price:

Single -mode optical fiber: The price is lower than the multi -mode fiber, but the equipment of the single -mode fiber is more expensive than the multi -mode fiber equipment, and the cost is higher than the dual -mode fiber.

Multi -mode fiber: The price is higher than the single -mode fiber, and the equipment of multi -mode fiber is cheaper than single -mode fiber equipment, so the cost of multi -mode fiber is far less than the cost of single -mode fiber.

⑦ Transmission distance:

Single -mode optical fiber: The single -mode fiber runs at 100m/s or 1g/s data rate, and the transmission distance can reach at least 5km. Under normal circumstances, single -mode optical fiber is used for remote signal transmission;

Multi -mode optical fiber: Multi -mode fiber is mainly used for short -range optical fiber communication, such as in buildings or on campus. When the transmission speed is 100m/s, the transmission distance is 2km.