Overview of 10G CWDM SFP+ Transceivers
10G CWDM SFP+ (Coarse Wavelength Division Multiplexing) modules are a powerful solution for dramatically increasing the bandwidth of existing fiber optic infrastructure. Essentially, this technology uses different colors, or wavelengths, of light to carry multiple signals over a single pair of fibers. For instance, instead of one 10G link, you can now transmit up to 18 independent 10G links simultaneously. This is achieved by using a specific CWDM SFP+ module for each colored wavelength.
Furthermore, a CWDM system requires a passive component called a Mux/Demux (Multiplexer/Demultiplexer). A Mux combines the different colored light signals from multiple CWDM SFP+ transceivers onto one fiber. At the other end, a Demux separates these signals back into their original channels. Because these Mux/Demux units are passive, they require no power or cooling. Consequently, CWDM provides a highly reliable and cost-effective way to scale network capacity. As a result, it is an ideal choice for data center interconnects, enterprise backbones, and metro access networks.
Key Features and System Components
Our 10G CWDM SFP+ transceivers are MSA-compliant and designed for high performance. Indeed, they offer a scalable path for network growth.
- High Channel Capacity: First and foremost, CWDM supports up to 18 channels over a single fiber pair, enabling a total aggregate bandwidth of 180Gbps.
- Standardized Wavelengths: Each module operates on one of the 18 standard CWDM wavelengths, from 1270nm to 1610nm, with a 20nm spacing between channels.
* Cost-Effective Scaling: In addition, CWDM is significantly less expensive than laying new fiber. It is also generally more affordable than DWDM for systems with fewer than 18 channels.
* Passive Infrastructure: The required CWDM Mux/Demux units are passive devices, which increases system reliability and lowers operational costs.
* Multiple Distance Options: We offer CWDM SFP+ modules for various distances, commonly reaching up to 40km or even 80km, depending on the link budget.
Specifications
| Parameter | Value |
|---|---|
| Form Factor | SFP+ (Enhanced Small Form-factor Pluggable) |
| Technology | CWDM (Coarse Wavelength Division Multiplexing) |
| Max Data Rate | 10.3125 Gbps per channel |
| Wavelength Range | 1270nm to 1610nm |
| Channel Spacing | 20nm |
| Max Channels | 18 |
| Max Distance | Typically up to 80km |
| Connector | Duplex LC |
FAQ (Technical & product category Questions)
1. What is the difference between CWDM and DWDM?
CWDM (Coarse WDM) uses wider channel spacing (20nm). This allows for less expensive, uncooled lasers. DWDM (Dense WDM) uses much tighter spacing (0.8nm or less), which allows for many more channels (40, 80, or more) but requires more precise, temperature-controlled lasers and often signal amplification, making it more complex and costly.
2. Do I need a special CWDM SFP+ port on my switch?
No. You can use any standard 10G SFP+ port. The “magic” of CWDM happens outside the switch. The switch simply sees a standard 10G connection from each SFP+ module. The Mux/Demux is what manages the wavelengths on the fiber line.
3. What is a CWDM Mux/Demux?
It is a passive device with multiple ports. On the transmitting side, the Multiplexer (Mux) combines the optical signals from different CWDM transceivers (each a different wavelength) into a single fiber output. On the receiving side, the Demultiplexer (Demux) separates this combined signal back into the individual wavelengths, directing each to a corresponding transceiver.
4. Can I use a 1470nm CWDM module from you and a 1490nm module from another brand?
Yes. As long as both modules adhere to the ITU G.694.2 CWDM standard for wavelengths and are MSA-compliant, they will work together in the same system. The key is that the wavelength of each module is correct and distinct.
5. Is amplification needed for a 10G CWDM system?
Generally, no. CWDM systems are designed to be passive and are typically used for distances up to 80km. Unlike long-haul DWDM which often requires Erbium-Doped Fiber Amplifiers (EDFAs) to boost the signal, CWDM’s simplicity is one of its main advantages.