980/1550nm Single Mode Fused WDM

Dimensions

FAQ

Q: What is a 980/1550nm WDM used for?

A: A 980/1550nm WDM is mainly used in EDFA (Erbium-Doped Fiber Amplifier) systems to combine the 980nm pump laser with the 1550nm signal. It enables efficient amplification of optical signals in fiber communication networks.

Q: What is the difference between fused WDM and thin film WDM?

A: Fused WDM devices are manufactured by fusing optical fibers together, resulting in a compact, all-fiber structure with excellent stability and low insertion loss. Compared to thin film filter (TFF) WDMs, fused WDMs are generally more robust and better suited for high-power and harsh environments, while TFF WDMs may offer sharper wavelength separation but are more sensitive to environmental conditions.

Q: How important is isolation in a 980/1550 WDM?

A: Isolation is very important as it prevents the 980nm pump light from leaking into the signal path and vice versa. High isolation ensures stable operation of the amplifier and protects sensitive components in the system. This product typically provides ≥20 dB isolation, which is sufficient for most EDFA applications.

Q: Is this WDM suitable for bidirectional transmission systems?

A: While the primary use of 980/1550nm WDM is pump coupling in EDFA systems, it can also be used in certain bidirectional or multi-wavelength systems where these wavelengths need to be separated or combined. However, for standard bidirectional transmission, other wavelength combinations such as 1310/1550nm are more commonly used.