Multimensive:

It can spread hundreds of or thousands of modes, called multi -mode (MM) fiber. According to the radial distribution of the refractive index in the fiber core and the packet layer, it can be divided into level multi -mode fiber and gradient multi -mode fiber. Almost all multi -mode fiber size is 50/125 μm or 62.5/125 μm, and bandwidth (optical information transmission volume) is usually 200MHz 

By 2GHz. Multi -mode optical terminals can transmit up to 5 kilometers through multi -mode fiber. Taking light emitting diode or laser as a light source.

Single mode:

Fiber that can only spread one mode is called single -mode fiber. Standard single -mode (SM) fiber fiber refractive index distribution is similar to that of jump fiber, but the diameter of the core of the fiber is much smaller than the multi -mode fiber.

The size of the single-mode fiber is 9-10/125 μm, and the characteristics of unlimited bandwidth and lower loss are more than the multi-mode fiber. The single -mode light end machine is mostly used for long -distance transmission, sometimes it can reach 150 to 200 kilometers. Use LD or narrow LEDs as a light source.

Difference and connection:

Single -mode device can usually run both on the single -mode fiber or on multi -mode fiber, and the multi -mode device is limited to running on multi -mode fiber.

What is the transmission loss when using optical cable?

This depends on the wavelength of transmission and the type of fiber used.

850nm wavelength when it is used for multi -mode fiber: 3.0 decibel/km

1310nm wavelength when it is used for multi -mode fiber: 1.0 decibel/km

1310nm wavelength when used for single -mode fiber: 0.4 decibel/km

1550nm wavelength when it is used for single -mode fiber: 0.2 decibel/km