SFP28 25G DWDM (C-Band 20CH/ O-Band 12CH) 40km

Q1: What is a 25G SFP28 DWDM 40km transceiver?

A: A 25G SFP28 DWDM 40km transceiver is a high-speed optical module designed for long-distance transmission over Dense Wavelength Division Multiplexing (DWDM) networks. Using fixed DWDM wavelengths, it enables multiple 25Gbps services to share the same fiber, maximizing bandwidth and fiber utilization.

Key features include:

• 25G SFP28 hot-pluggable form factor

• C-Band 20CH or O-Band 12CH wavelength options

• Up to 40km transmission over single-mode fiber

• Duplex LC optical connector

• Compatible with DWDM transport networks

It is ideal for 5G fronthaul, metro optical networks, Data Center Interconnect (DCI), and enterprise backbone networks.

Q2: How does a 25G DWDM transceiver work?

A: A 25G DWDM transceiver transmits 25Gbps optical signals using a dedicated fixed DWDM wavelength. When deployed with a DWDM MUX/DEMUX, multiple wavelength channels are multiplexed onto a single fiber and separated at the receiving end.

This approach greatly increases fiber capacity while minimizing new fiber deployment, making it an efficient solution for high-density optical transmission networks.

Q3: What are the key features of the C-LIGHT 25G DWDM 40km transceiver?

A: The C-LIGHT 25G SFP28 DWDM 40km transceiver is engineered for stable long-distance communication in carrier-grade optical networks.

Key features include:

• Up to 25.78Gbps data rate

• 30–40km transmission over single-mode fiber

• C-Band 20CH or O-Band 12CH wavelength options

• EML transmitter and APD receiver

• 16dB optical power budget

• Power consumption ≤1.5W

These features provide reliable performance, excellent signal quality, and efficient wavelength utilization in high-density DWDM systems.

Q4: What are the advantages of a 25G DWDM 40km transceiver?

A: Compared with standard gray optics, a 25G DWDM transceiver offers higher transmission efficiency and greater network scalability.

Key advantages include:

• Higher fiber utilization

• Longer transmission distance

• More available wavelength channels

• Lower infrastructure costs

• Easy network expansion

These advantages make DWDM technology an ideal solution for metro, carrier, and enterprise optical transport networks.

Q5: Where are 25G DWDM 40km transceivers commonly used?

A: 25G DWDM 40km transceivers are widely deployed in medium- and long-distance optical communication networks requiring high-capacity wavelength multiplexing.

Typical applications include:

• 5G fronthaul networks

• Metro Ethernet

• DWDM transport networks

• Enterprise backbone networks

• Access network uplinks

• Data Center Interconnect (DCI)

These applications benefit from efficient wavelength multiplexing, reliable transmission, and reduced fiber deployment costs.

Q6: Why choose a 25G DWDM transceiver instead of a standard 25G module?

A: A 25G DWDM transceiver allows multiple high-speed services to coexist on a single fiber by assigning each service a dedicated DWDM wavelength.

Its advantages include:

• Higher fiber capacity

• Reduced deployment costs

• Long-distance transmission

• Flexible wavelength planning

• Excellent scalability

It is particularly suitable for operators and enterprises building high-capacity optical transport networks with limited fiber resources.

Q7: How do you choose the right 25G DWDM transceiver?

A: Selecting the appropriate 25G DWDM transceiver depends on your network architecture and transmission requirements.

1. Transmission Distance

• Required optical reach

• Link budget requirements

2. DWDM Wavelength

• C-Band or O-Band channel

• Channel spacing compatibility

3. Optical Infrastructure

• DWDM MUX/DEMUX insertion loss

• Optical power budget

4. Deployment Environment

• Operating temperature

• Switch and platform compatibility

Choosing the correct module helps ensure stable DWDM transmission, simplified deployment, and long-term network scalability.

Q8: Why choose the C-LIGHT 25G SFP28 DWDM 40km solution?

A: The C-LIGHT 25G SFP28 DWDM 40km transceiver combines long-distance transmission, low power consumption, and flexible wavelength options in a compact SFP28 package.

It provides:

• Up to 40km transmission over single-mode fiber

• C-Band 20CH and O-Band 12CH DWDM options

• 16dB optical power budget

• Low power consumption

• Excellent compatibility with mainstream networking platforms

• Reliable carrier-grade optical performance

It is an ideal solution for 5G fronthaul, metro networks, enterprise backbone networks, Data Center Interconnect (DCI), and DWDM optical transport systems.