C-LIGHT 25G CWDM SFP28 10km Optical Transceiver is a high-performance, industrial-temperature-range, and cost-effective transmission solution specifically designed for 25 Gigabit Ethernet and Fibre Channel applications. Housed in a compact SFP28 form factor, it supports transmission distances of up to 10 kilometers over standard single-mode fiber. Operating within the ITU-T CWDM wavelength range from 1470nm to 1610nm, the module typically supports 6 or 8 wavelength channels. By leveraging Coarse Wavelength Division Multiplexing (CWDM) technology, it enables the simultaneous transmission of multiple 25G signals over a single fiber, significantly improving fiber resource utilization. It is an ideal choice for data center interconnects, 5G fronthaul/midhaul, and enterprise campus networks.

Key Features and Advantages

Supports data rates up to 25.78 Gbps, fully compliant with the IEEE 802.3by 25GBASE-ER standard and relevant industry specifications.

Employs Directly Modulated Laser (DML) technology, maintaining high performance while significantly reducing the complexity and cost of lasers and associated control circuitry compared to DWDM solutions.

CWDM Technology Advantages:

Utilizes CWDM wavelength channels (e.g., 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm, 1610nm - typical), increasing single-fiber capacity by 6 to 8 times.

Wide wavelength spacing (20nm) ensures excellent wavelength stability, eliminating the need for expensive temperature-control devices (coolers), thereby reducing power consumption and overall operational costs.

Industrial-Grade Reliability:

Supports commercial (0°C to +70°C) or extended industrial temperature ranges (-40°C to +85°C), suitable for harsh outdoor or telecommunications access environments.

Compliant with SFP28 MSA (Multi-Source Agreement) and RoHS standards, ensuring excellent mechanical compatibility and environmental friendliness.

Digital Diagnostic Monitoring (DDM):

Integrated Digital Diagnostic Monitoring function allows real-time access to key module parameters such as temperature, supply voltage, bias current, transmitted optical power, and received optical power via the host device's I2C interface, facilitating network management and troubleshooting.

Low Power Consumption & Ease of Use:

Typical power consumption is below 1.5W, offering energy efficiency.

Hot-pluggable design supports installation or replacement of the module without shutting down the system power, simplifying maintenance and upgrades.

Features a standard LC duplex fiber connector for strong interface compatibility.

Typical Application Scenarios

25G Ethernet Switch/Router Uplinks: For high-speed interconnects between devices in data center leaf-spine architectures or enterprise core networks.

5G Mobile Fronthaul and Midhaul Networks: Connects 5G base stations (AAU/RRU) to distributed units, meeting the demands of 5G networks for high bandwidth, low latency, and high-density connectivity.

Data Center Interconnect (DCI): Enables low-cost, high-bandwidth interconnection between data centers in the same campus or metro area.

Enterprise and Campus Network Backbones: Provides high-speed, reliable network backbone connections across buildings for large enterprises or campuses.

Fibre Channel Storage Networks: Supports 32GFC applications for connecting storage devices.

The 25G CWDM SFP28 10km Optical Transceiver successfully combines the high-speed 25G interface with the cost-effectiveness and flexibility of CWDM technology. It offers a highly cost-effective solution for metro access, data center expansion, and 5G transport networks, helping network operators and enterprises upgrade their network bandwidth without the need for additional physical fiber cabling.