25G CWDM SFP28 Transceivers Modules

Overview of 25G CWDM SFP28 Modules

Our category of 25G CWDM SFP28 transceivers provides a versatile and cost-effective solution for scaling network capacity. Specifically, they work over your existing single-mode fiber infrastructure. By utilizing Coarse Wavelength Division Multiplexing (CWDM) technology, these modules transmit multiple, independent 25Gbps data streams over a single fiber pair. As a result, this dramatically increases bandwidth without the significant expense of laying new fiber cables.

Furthermore, this product line is engineered to support a wide array of networking demands. It offers various reach options, from 10km for campus links to 40km for 5G midhaul applications. Therefore, each transceiver in our 25Gbps CWDM SFP28 collection is built to comply with MSA (Multi-Source Agreement) standards. This ensures seamless interoperability with a broad range of equipment from leading vendors.

Key Features

• High Bandwidth Aggregation: First and foremost, these modules can combine up to 18 distinct 25Gbps channels onto a single fiber pair. This capability maximizes the utility of your current fiber plant.
• Flexible Reach Options: Additionally, you can choose from modules designed for various distances. This includes standard 10km, intermediate 25km, and extended reach up to 40km.
• Full CWDM Wavelength Spectrum: In fact, modules are available across the full 18-channel CWDM grid (1271nm to 1611nm). This allows you to build high-density, scalable networks.
• Advanced Laser Technology: This category also utilizes cost-effective DFB DML lasers for shorter distances (≤10km). For long-haul links (25km and 40km), it uses high-performance EML (Externally Modulated Laser).
• Hot-Swappable SFP28 Form Factor: Consequently, the form factor allows for easy installation, upgrades, and maintenance. This can be done in network devices without service interruption.
• Digital Diagnostics Monitoring (DDM/DOM): Finally, DDM provides real-time access to critical operating parameters. These include optical power, temperature, and voltage for enhanced network management.

Applications

Indeed, the flexibility of our 25G CWDM SFP28 modules makes them suitable for a diverse set of high-speed networking scenarios:

• 5G Fronthaul and Midhaul: For instance, they aggregate massive data streams between cell sites and central offices over extended distances.
• Metro Access Networks: Likewise, they can be used to build scalable and resilient rings. These rings connect business customers and data centers across a metropolitan area.
• Data Center Interconnect (DCI): Another key use is to link multiple data centers. This provides high-capacity, long-reach connections between them.
• Enterprise and Campus Backbones: Lastly, they help consolidate multiple 25G links between buildings or across a large campus using limited fiber resources.

Specifications

Advantages of Choosing a CWDM Solution

The primary advantage of a 25G CWDM SFP28 system is immense fiber relief and future-proofing. For example, it provides a “pay-as-you-grow” model. You can start with a few channels and add more as bandwidth needs increase. All of this can be done without touching your physical cable plant. Moreover, using passive CWDM MUX/DEMUX units reduces network complexity and power consumption. It also lowers potential points of failure compared to active systems. This ultimately leads to a lower Total Cost of Ownership (TCO) and a more resilient network.

FAQ (Technical & product category Questions)

1. What is a 25G CWDM SFP28 transceiver?

A 25G CWDM SFP28 is an optical module. It is designed to transmit 25Gbps data over a specific wavelength of light (a “color”). Network operators use a range of these modules, each with a different wavelength. Then, using a CWDM MUX/DEMUX unit, they combine them onto a single fiber. This process multiplies the fiber’s capacity.

2. Do I always need a CWDM MUX/DEMUX to use these modules?

Yes, a passive CWDM MUX/DEMUX is essential to achieve the multi-channel benefit. Specifically, a multiplexer at one end combines the wavelengths. A demultiplexer at the other end then separates them. However, a single pair of identical CWDM modules can also be used for a standard point-to-point link.

3. What wavelengths are available in this category?

This category includes modules covering the entire ITU-T G.694.2 CWDM grid. This consists of 18 channels spaced 20nm apart, from 1271nm up to 1611nm. This, in turn, allows for highly dense and scalable network designs.

4. How do the 10km and 40km 25G CWDM SFP28 modules differ?

The main difference lies in the internal laser technology and optical power budget. For instance, modules for shorter reaches (up to 10km) typically use a cost-effective Directly Modulated Laser (DML). In contrast, longer distances like 40km require a more powerful Externally Modulated Laser (EML). This is necessary to overcome signal loss over the extended fiber length.

5. What is the main difference between 25G CWDM and 25G DWDM?

CWDM uses wide 20nm channel spacing. Consequently, this allows for less expensive, uncooled lasers. This makes it a cost-effective solution for up to 18 channels. On the other hand, DWDM (Dense WDM) uses much tighter channel spacing (e.g., 0.8nm). This enables 40, 80, or even more channels. However, it requires more precise and expensive temperature-controlled lasers.

6. What kind of fiber is required for these CWDM modules?

All 25G CWDM SFP28 modules require standard Single-Mode Fiber (SMF). Specifically, this means OS1 or OS2 patch cables. These cables should be terminated with duplex LC connectors, regardless of the module’s reach.

7. Is FEC (Forward Error Correction) required for 25G CWDM links?

Enabling host-side FEC (specifically RS-FEC) is recommended for all 25G links. In fact, it is essential for longer-reach modules like the 25km and 40km variants. FEC helps correct minor bit errors over long fiber spans. This, in turn, ensures a stable and reliable connection.

8. Are these 25G CWDM modules compatible with major equipment vendors?

Absolutely. Our modules are programmed to be compatible with equipment from major vendors like Cisco, Arista, and Juniper. Above all, they are built to MSA standards. This guarantees broad interoperability in diverse network environments.