10G CWDM XFP ER 1270nm 40km

Q: How does a 10G XFP optical module adapt to different transmission distances with various fiber types?

A: By employing different types of laser and receiver components, the 10G XFP optical module can accommodate both multi-mode fiber (MMF) and single-mode fiber (SMF). Multi-mode versions, suitable for short-range transmissions, utilize VCSELs (Vertical Cavity Surface Emitting Lasers), while single-mode versions employ DFB (Distributed Feedback) or EML (Electro-absorption Modulated Laser) lasers for longer distances.

Q: What wavelengths do 10G XFP optical modules operate at?

A: Wavelengths vary according to application, typically including 850nm (for short-distance multi-mode 10GBASE-SR), 1310nm (for single-mode long-distance 10GBASE-LR), 1550nm (used for extended-range transmissions like 10GBASE-ER, ZR), and Dense Wavelength Division Multiplexing (DWDM) wavelengths, such as multiple fixed wavelengths within the 1530nm to 1560nm range.

Q: How to calculate link budget and loss for a 10G XFP optical module?

A: Link budget calculation involves considering factors such as transmit power, receiver sensitivity, fiber attenuation per kilometer, losses from connectors and splices, and any optical amplifier gain (if applicable). To establish a stable connection, it is essential that the transmit power, after subtracting all total losses, meets or exceeds the receiver sensitivity requirement.