5G Fronthaul WDM

C-LIGHT 5G fronthaul refers to the fiber-based connection between the Distributed Unit (DU) and Active Antenna Unit (AAU) in a 5G C-RAN architecture. With 5G's higher bandwidth demands, massive MIMO antennas, and stringent latency requirements, traditional fiber solutions like direct fiber connections become impractical due to limited fiber resources. Wavelength Division Multiplexing (WDM) addresses this by enabling multiple optical signals to share a single fiber, significantly reducing fiber consumption while maintaining high capacity and low latency.

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Product Details

5G Fronthaul Semi-active WDM Equipment
The 5G fronthaul semi-active wavelength division equipment launched by C-Light Network address the problems of limited optical cable resources, long construction period, and high cost caused by direct drive of optical cables between DU-AAU in 5G fronthaul. The DU side uses active WDM equipment, and the AAU side uses a passive wavelength division multiplexer plus colored optical modules to form a unified manageable fronthaul network.Supporting IP-based Web management and Netconf/Yang-based unified management for operators, it provides a good solution to help reduce costs, achieve high reliability and quickly deploy 5G fronthaul networks.
Product Feature			Product Diagram
●Low insertion loss and polarization-dependent loss ●Support CWDM 12-wave ●High channel isolation ●High stability and reliability ●Wide working wavelength range ●Wide operating temperature range ●Support multi-kinds of graphical interface network management, such as Netconf/yang, Web ●Conform to ITU-T G.694.2 ●Conform to Telcordia GR-1209-CORE-2001 standard ●Conform to Telcordia GR-1221-CORE-1999 standard ●Conform to RoHS-6 (no lead)			Remote chip box
			Pluggable card
			2RU： 483(D)×350(W)×88(H)mm
Application Topology

Application Scheme

Central office equipment
Product Specification
Function	Parameter
Model (DU&BBU side)	C6	C12	OLP-C6	OLP-C12
Description	no protection		with protection
orking wavelength	1271/1291/1311/1331/1351/1371nm	1271/1291/1311/1331/1351/1371/1471/1491/1511/1531/1551/1571nm	1271/1291/1311/1331/1351/1371nm	1271/1291/1311/1331/1351/1371/1471/1491/1511/1531/1551/1571nm
Insertion loss	≤2.0 dB	≤2.5dB	≤3.0 dB	≤3.5 dB
Channel insertion loss uniformity	≤1.0dB
Channel bandwidth	TU±6.5
Adjacent channel isolation	＞25 dB
Non-adjacent channel isolation	＞30 dB
Polarization dependent loss	≤ 0.2dB
Switching time	＜35ms
Switch type	Latching
Return loss	＞45 dB
Connectors	LC/PC
Operating voltage	DC-48V or AC220V
Operating Temperature	-10 ~ 60 °C
Storage Temperature	-40 ~ 85 °C
Central Office Chassis Type	2RU standard 19’’rack 442(W)×350(D)×88(H)mm 3RU standard 19’’rack 442(W)×350(D)×132(H)mm 5RU standard 19’’rack 442(W)×350(D)×220(H)mm
Remote device
1U 3-slot chassis
Remote plug box
Product Specification
Function	Parameter
Model (AAU&RRU side)	C6	C12	C6P	C12P
Description	no protection		with protection
Working wavelength	1271/1291/1311/1331/1351/1371nm	1271/1291/1311/1331/1351/1371/1471/1491/1511/1531/1551/1571nm	1271/1291/1311/1331/1351/1371nm	1271/1291/1311/1331/1351/1371/1471/1491/1511/1531/1551/1571nm
Insertion loss	≤2.0 dB	≤2.5dB	≤6.0 dB	≤6.5 dB
Channel insertion loss uniformity	≤1.0dB
Channel bandwidth	ITU±6.5
Adjacent channel isolation	＞25 dB
Non-adjacent channel isolatio	＞30 dB
Polarization dependent loss	≤ 0.2dB
Return loss	＞45 dB
Connectors	LC/PC
Operating Temperature	-40 ~ 85 °C
Storage Temperature	-40 ~ 85 °C
Working humidity	5%～95% RH, no condensation
Remote plug box size	Single layer size (suitable for C6 and C12): 130×100×25mm Double layer size (suitable for C18): 130×100×50mm