Single -mode fiber and multi -mode fiber for small knowledge for optical modules.sfp 10g 19km optical module Processing

1. What is the difference between single -mode fiber and multi -mode fiber?

Single -mode fiber uses solid laser as a light source; multi -mode fiber uses luminous diode as a light source; single -mode optical fiber transmission bandwidth, long transmission distance, but due to the need for laser sources, high cost; low transmission speed of multi -mode fiber, short distance, but cost, but cost Low; single -mode optical fiber core diameter and small color scattered, only one mode transmission; multi -mode optical fiber core diameter and large color scattered, allowing hundreds of modes to be transmitted.

2. What is the difference between a single -mode light module and multi -mode light module?

Answer: The working wavelength of the multi -mode light module is 850nm; the operating wavelength of the single -mode dual -fiber light module is generally 1310nm and 1550nm; the equipment used in the single -mode light module is twice the multi -mode light module, so the overall cost of the single -mode light module is far away Higher than the multi -mode light module; the transmission distance of the single -mode light module can reach 160km; the transmission distance of the multi -mode light module can reach 2km.

3. Can multi -mode fiber be used for single -mode optical modules?

First of all, multi -mode and single -mode converters must have the corresponding wavelength and light collection function to achieve photoelectric conversion. Secondly, the core diameter of single -mode fiber and multi -mode fiber is very different, which will cause too much damage when the two match. Therefore, multi -mode optical fiber can be used with the single -mode optical module, which cannot guarantee the effect.