The 100G QSFP28 CWDM4, a cutting-edge optical transceiver, is one of the significant advancements in the world of network infrastructure. It stands for Quad Small Form-factor Pluggable 28 Coarse Wavelength Division Multiplexing 4. In essence, this transceiver utilizes wavelength division multiplexing technology to increase the quantity of data sent over a single fiber optic cable, providing impressive speeds up to 100 gigabits per second (100G).

The “QSFP28” part of the name refers to the transceiver’s format, which can accommodate high-speed electrical interfaces for data rates up to 100G. “CWDM4” designates the device’s use of four channels, each using a different wavelength, to transmit and receive data. This particular technology allows for a total of 100G data transmission across a 2 km single-mode fiber, which greatly improves the efficiency of data center interconnections.

Work Principle for QSFP28 CWDM4

The operation of a QSFP28 CWDM4 transceiver is based on the principles of coarse wavelength division multiplexing (CWDM). The CWDM technology divides the total bandwidth into multiple channels, each assigned a unique wavelength. This allows simultaneous transmission of different data streams over a single fiber optic cable.

In the case of the QSFP28 CWDM4, there are four channels in use, each with its specific wavelength between 1270nm and 1330nm, spaced 20nm apart. These four wavelengths are multiplexed together and sent across a single fiber for both transmit and receive functions. This multiplexing action results in a quadrupling of the fiber optic cable’s data-carrying capacity, achieving data rates up to 100Gbps.

QSFPTEK CWDM4 Specification

Based on the specification provided at https://www.qsfptek.com/product/88421.html, the QSFPTEK CWDM4 comes with impressive features. Here is a summary:

Feature	Specification
Data Rate	100Gbps
Distance	2km
Wavelengths	1270nm, 1290nm, 1310nm, 1330nm
Fiber Type	Single-Mode Fiber (SMF)
Transceiver Format	QSFP28
Operating Temperature	0°C to 70°C
Maximum Power Consumption	3.5W
Optical Components	Uncooled 4x25G DFB Laser
Interface	Duplex LC Connector
Digital Diagnostic Monitoring	Yes, via I2C interface
Hot-pluggable	Yes
Compliance	RoHS6, CE, FCC, CDRH, MSA
Housing Material	Cast Metal
Warranty	3 years

This extended specification sheet should provide a more comprehensive understanding of the QSFPTEK CWDM4 transceiver’s capabilities and characteristics. From the power consumption to the interface and housing material, this information can help network engineers and administrators make informed decisions about the appropriateness of this transceiver for their specific networking needs.

The Application of 100G CWDM4

QSFP28 CWDM4 Advantages

The QSFP28 CWDM4 transceiver is especially useful in data center interconnects. It allows for efficient data transfer over a relatively long distance (up to 2km) without sacrificing speed, thus making it an ideal choice for large data centers or cloud service providers.

One of the key advantages of the QSFP28 CWDM4 is its ability to transmit multiple data streams simultaneously, which significantly improves the efficiency of data transmission. This characteristic can help organizations save on infrastructure costs, as fewer fibers are needed for the same data capacity.

Another advantage is its interoperability. The CWDM4 MSA standard is designed to enable compatibility between different manufacturers’ products, providing organizations with the flexibility to integrate devices from various vendors.

100G QSFP28 CWDM4 FAQs

Q1. What is the primary application for the 100G QSFP28 CWDM4?

A1. The primary application for the 100G QSFP28 CWDM4 is in data center interconnects due to its high data transmission rate, long reach, and compatibility with single-mode fiber.

Q2. Can I use QSFP28 CWDM4 with multimode fiber?

A2. No, the QSFP28 CWDM4 is designed specifically for single-mode fiber use.

Q3. What is the maximum data transmission distance for the QSFP28 CWDM4?

A3. The QSFP28 CWDM4 can transmit data up to 2km.

Q4. What are the wavelengths used in the QSFP28 CWDM4?

A4. The QSFP28 CWDM4 uses four different wavelengths: 1270nm, 1290nm, 1310nm, and 1330nm.

Q5. What is the difference between CWDM4 and LR4?

A5. While both CWDM4 and LR4 are standards for 100Gbps optical links, they have distinct characteristics. The CWDM4, as detailed above, uses four channels each operating at 25Gbps over four different wavelengths for a total of 100Gbps on single-mode fiber up to 2km. The LR4, on the other hand, also operates at 100Gbps but can transmit up to 10km. However, LR4 uses more expensive components, such as cooled lasers, which makes CWDM4 a more cost-effective option for shorter distances.

Q6. Can CWDM4 and LR4 interoperate with each other?

A6. Unfortunately, no. While both CWDM4 and LR4 support 100Gbps over single-mode fiber, they operate at different wavelengths and have different reach, which makes them non-interoperable.

Q7. Why should I choose QSFP28 CWDM4 over QSFP28 LR4?

A7. QSFP28 CWDM4 is generally more cost-effective for shorter distances (up to 2km), making it ideal for data center interconnections. It offers similar performance to the LR4 at a lower cost due to its use of uncooled lasers and simpler module construction.

These FAQs should provide a clearer understanding of the 100G QSFP28 CWDM4 transceiver and its advantages over other options such as the LR4. As the demand for higher data rates continues to grow, the 100G QSFP28 CWDM4 is poised to be a go-to solution for organizations that want to optimize their network infrastructure while controlling costs.