25G CWDM 8ch 1471nm~1611nm 20km Long Distance Transceiver

Q1: What is a 25G CWDM 20km transceiver?

A: A 25G CWDM 20km transceiver is an SFP28 optical module designed for high-speed data transmission over single-mode fiber (SMF). Using Coarse Wavelength Division Multiplexing (CWDM) technology, it supports multiple wavelength channels, enabling more efficient fiber utilization in 25G Ethernet networks.

Key features include:

• 25GBASE transmission

• 8 CWDM wavelengths (1471–1611nm)

• Up to 20km over SMF

• SFP28 hot-pluggable form factor

• Duplex LC connector

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

Q2: How does a 25G CWDM transceiver work?

A: A 25G CWDM transceiver transmits 25Gbps optical signals over a designated CWDM wavelength on single-mode fiber. When used together with CWDM MUX/DEMUX devices, multiple wavelength channels can share the same fiber, significantly increasing network capacity without deploying additional fiber infrastructure.

This wavelength multiplexing technology helps network operators expand bandwidth while reducing capital expenditure and maximizing existing fiber resources.

Q3: What are the key features of the C-LIGHT 25G CWDM 20km transceiver?

A: The C-LIGHT 25G CWDM 20km SFP28 transceiver is engineered for stable, long-distance optical transmission in carrier and enterprise networks.

Key features include:

• 25.78Gbps data rate

• 8 CWDM wavelength options (1471–1611nm)

• Up to 20km transmission distance

• EML transmitter and APD receiver

• Power consumption ≤1.5W

• Industrial operating temperature (-40°C to +85°C)

These features deliver reliable optical performance, low power consumption, and excellent interoperability for high-speed optical networks.

Q4: What are the advantages of a 25G CWDM transceiver?

A: Compared with conventional gray optics, a 25G CWDM transceiver provides greater bandwidth efficiency and improved network scalability.

Key advantages include:

• Higher fiber utilization

• Longer transmission distance

• Lower deployment costs

• Easy wavelength expansion

• Reliable 25G optical performance

These advantages make CWDM technology an efficient and economical solution for high-density optical transmission networks.

Q5: Where are 25G CWDM 20km transceivers commonly used?

A: 25G CWDM 20km transceivers are widely deployed in medium-distance optical communication networks where efficient wavelength multiplexing is required.

Typical applications include:

• 5G fronthaul networks

• Data Center Interconnect (DCI)

• Metro Ethernet networks

• Enterprise backbone networks

• Carrier access networks

These applications benefit from higher fiber utilization, scalable bandwidth, and reliable long-distance optical transmission.

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

A: A 25G CWDM transceiver allows multiple optical services to share the same fiber infrastructure, making it an excellent choice where fiber resources are limited.

Its advantages include:

• Better fiber utilization

• Lower network deployment costs

• Scalable wavelength expansion

• Reliable long-distance transmission

• Excellent compatibility with CWDM systems

It is particularly suitable for operators and enterprises seeking to expand network capacity without installing additional fiber.

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

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

1. Transmission Distance

• Required optical reach

• Link budget requirements

2. CWDM Wavelength

• Select the correct CWDM channel

• Match the MUX/DEMUX wavelength plan

3. Fiber Infrastructure

• Single-mode fiber compatibility

• CWDM MUX/DEMUX support

4. Deployment Environment

• Operating temperature

• Switch and platform compatibility

Choosing the correct module ensures reliable transmission, simplified deployment, and long-term network scalability.

Q8: Why choose the C-LIGHT 25G CWDM 20km transceiver?

A: The C-LIGHT 25G CWDM 20km SFP28 transceiver combines long-distance transmission, low power consumption, and industrial-grade reliability in a compact hot-pluggable design.

It provides:

• 25G high-speed optical transmission

• Up to 20km reach over single-mode fiber

• 8 CWDM wavelength options

• Low power consumption

• Industrial-grade operating temperature

• Excellent compatibility with mainstream networking platforms

It is an ideal solution for 5G fronthaul, metro Ethernet, enterprise backbone networks, carrier access networks, and Data Center Interconnect (DCI) deployments.