Key differences between optical modules and fiber optic transceivers

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First, the core concept

optical module

• MPOrtant;">Functions similar to "photoelectric converter"

• Converting electrical signals (computer language) to optical signals (fiber optic language), or vice versa

• It needs to be inserted into the switch and other devices for use.

fiber optic transceiver

• Independent "signal transfer station"

• Realize bi-directional conversion between electrical and optical signals

• Comes with its own power supply, can be used directly

Second, the three core differences

Third, the connection must see three elements

1. Wavelength should be aligned

2. 
   

   • Devices on the same end must use the same wavelength

   • Common combinations:

     • Short distance: 850nm (suitable for indoor use)

     • Long distance: 1310nm (within 5 kilometers)/1550nm (ultra-long distance)

   • Note: Single-fiber bidirectional optical modules must be used in pairs (such as TX1310 with RX1550)

   • 
     

3. The speed should match

4. 
   

5. 
   

   • Gigabit devices need to be equipped with gigabit modules

   • MHz (M) correspondence:

     • 100M → Gigabit Transceiver

     • 1G → Gigabit devices

     • 10G → Special 10 Gigabit Optical Module Required

     • 
       

6. Fiber optic types are mixed

7. 
   

8. 
   

   • Single-mode fiber (yellow) → suitable for urban backbone networks

   • Multimode fiber (orange) → for data center internal connections

   • Plastic optical fiber (red) → suitable for short-distance household use

   
   

9. 

10. 
    

IV. Application Guidelines

• insufficient powerLong-distance links require a 3dB margin

• Excessive dispersion: G.652.D single-mode fiber must be used for speeds above 10G

• electromagnetic interference: Keep away from high-power electrical appliances (distance > 1 meter)