QSFP28 100GBASE-CWDM4 2KM丨C-LIGHT

100G QSFP28 CWDM4 2KM optical transceiver is a high-speed QSFP28 module compliant with the 100GBASE-CWDM4 standard. It enables 100Gbps Ethernet data transmission over single-mode fiber (SMF) for distances up to 2 kilometers. Utilizing Coarse Wavelength Division Multiplexing (CWDM) technology, it multiplexes and demultiplexes signals on four specific wavelengths (1271nm, 1291nm, 1311nm, 1331nm). This module provides a cost-effective solution for data center interconnects (DCI) and metro access networks.

Product Features:

QSFP28-100GBASE-CWDM4-2KM ●Hot-pluggable QSFP28 form factor

●Supports 103.1Gb/s aggregate bit rate

●Power dissipation < 3.5W

●RoHS-6 compliant

●Commercial case temperature range of 0°C to 70°C

●Single 3.3V power supply

●Maximum link length of 2km on Single Mode Fiber (SMF)

●4x26Gb/s CWDM Transmitter: 4 channel 1270,1290, 1310,1330nm DFB laser

●4x26G retimed electrical interface

●Duplex LC receptacles

I2C management interface

Applications

Inter-Rack Connectivity in Data Centers

●Links TOR (Top of Rack) or EOR (End of Row) switches across cabinets/racks within the same data center hall.

EOR (End of Row) Aggregation

●Aggregates traffic from multiple racks to EOR core switches or backbone networks.

Short-Reach Data Center Interconnect (DCI)

●Connects data centers within a campus or adjacent buildings ≤ 2km distance.

Metro Access & Aggregation Networks

●Provides 100G high-speed uplinks from metro edge access points to aggregation nodes.

Enterprise Core Network Upgrades

●Replaces 10G/40G links to build high-bandwidth enterprise network backbones.

Cloud Service Provider Infrastructure

●Enables cost-effective, high-density 100G server access and switching for cloud platforms.

High-Density Switch Interconnect

●Facilitates high-density 100G stacking or interconnects between QSFP28 ports on core switches/routers.

Industrial Network Backbones

●Supports reliable ≤ 2km connectivity for industrial automation and smart campuses.

Data Sheet

QSFP28-100G-CWDM4-2KM.pdf

100G QSFP28 PSM4 2km Transceiver FAQ

Q1: What is a 100G QSFP28 PSM4 2km transceiver?

A 100G QSFP28 PSM4 2km transceiver is a hot-pluggable optical module designed for 100GbE transmission over parallel single-mode fiber (PSM4). It delivers 100Gbps connectivity up to 2km using an MPO-12 interface.

Key features include:

100Gbps data rate
PSM4 parallel optics
Up to 2km over SMF
MPO-12 APC connector
QSFP28 hot-pluggable form factor

It is ideal for AI data centers, cloud computing, HPC, and enterprise networks.

Q2: How does a 100G QSFP28 PSM4 transceiver work?

The module converts electrical signals into 4×25G NRZ optical channels, transmitting them over four parallel single-mode fiber pairs through an MPO-12 connector. This parallel architecture provides high bandwidth with low latency for short- to medium-distance links.

Q3: What are the key features of the C-LIGHT 100G QSFP28 PSM4 2km transceiver?

The C-LIGHT module is designed for reliable high-density 100G networking.

Key features include:

100Gbps Ethernet transmission
Up to 2km over SMF
4×25G NRZ channels
MPO-12 APC interface
QSFP28 MSA compliant
Digital Diagnostic Monitoring (DDM)
Power consumption<3.5w<>

These features provide stable and efficient optical connectivity for modern data centers.

Q4: What are the advantages of a 100G QSFP28 PSM4 transceiver?

Compared with duplex-fiber solutions, it offers:

Parallel single-mode transmission
Up to 2km reach
High port density
Low power consumption
Cost-effective deployment where MPO fiber is available

It is an efficient solution for high-speed data center interconnects.

Q5: Where are 100G QSFP28 PSM4 transceivers commonly used?

These modules are widely deployed in high-speed optical networks.

Typical applications include:

AI data centers
Cloud computing
High-Performance Computing (HPC)
Spine-Leaf architectures
Switch-to-switch links
Enterprise data centers

These applications require reliable 100Gbps transmission over distances up to 2km.

Q6: Why choose a 100G QSFP28 PSM4 instead of a 100G CWDM4 module?

A 100G PSM4 module uses parallel single-mode fiber with an MPO connector, while a 100G CWDM4 module transmits over duplex LC fiber using wavelength multiplexing.

Its advantages include:

Simple parallel optics
No wavelength multiplexing
Ideal for existing MPO infrastructure
High-density cabling
Excellent compatibility

It is ideal for data centers already deployed with parallel SMF cabling.

Q7: How do you choose the right 100G QSFP28 PSM4 transceiver?

When selecting a 100G PSM4 module, consider:

Transmission distance
Fiber type
MPO connector compatibility
Switch compatibility
Power consumption
IEEE/MSA compliance

Choosing the right module ensures reliable network performance and future scalability.

Q8: Why choose the C-LIGHT 100G QSFP28 PSM4 2km transceiver?

The C-LIGHT 100G QSFP28 PSM4 combines reliable 2km transmission, low power consumption, and high-density connectivity in a compact QSFP28 package.

It provides:

100Gbps bandwidth
Up to 2km over SMF
Parallel PSM4 optical technology
Power consumption<3.5w<>
Broad platform compatibility

It is an ideal solution for AI data centers, HPC clusters, cloud computing, and enterprise optical networks.

100G QSFP28 CWDM4 2KM Transceiver FAQ

Q1: What is a 100G QSFP28 CWDM4 2KM transceiver?

A 100G QSFP28 CWDM4 2KM transceiver is a hot-pluggable optical module designed for 100GbE transmission over single-mode fiber. Using CWDM4 technology, it delivers reliable 100Gbps connectivity up to 2km.

Key features include:

100Gbps data rate
CWDM4 optical technology
Up to 2km over SMF
Duplex LC connector
QSFP28 hot-pluggable form factor

It is ideal for DCI, cloud computing, enterprise networks, metro access, and high-density switching.

Q2: How does a 100G QSFP28 CWDM4 2KM transceiver work?

The module converts electrical signals into four CWDM optical wavelengths (1270nm, 1290nm, 1310nm, and 1330nm), multiplexes them onto a duplex single-mode fiber pair, and enables efficient 100Gbps Ethernet transmission up to 2km.

Q3: What are the key features of the C-LIGHT 100G QSFP28 CWDM4 2KM transceiver?

The C-LIGHT module is designed for reliable medium-reach 100G networking.

Key features include:

100Gbps Ethernet transmission
Up to 2km over SMF
4×26G CWDM DFB lasers
Duplex LC interface
QSFP28 MSA compliant
I²C management interface
Power consumption <3.5W

These features provide stable, low-power optical connectivity for modern data centers.

Q4: What are the advantages of a 100G QSFP28 CWDM4 2KM transceiver?

Compared with multimode 100G modules, it offers:

Longer transmission distance
Duplex LC connectivity
Low power consumption
High bandwidth density
Cost-effective deployment

It is an efficient solution for medium-distance 100G optical interconnects.

Q5: Where are 100G QSFP28 CWDM4 2KM transceivers commonly used?

These modules are widely deployed in high-speed optical networks.

Typical applications include:

Data Center Interconnect (DCI)
Inter-rack connectivity
Enterprise core networks
Metro access networks
Cloud infrastructure
High-density switch interconnects

These applications require reliable 100Gbps transmission over distances up to 2km.

Q6: Why choose a 100G QSFP28 CWDM4 2KM instead of a 100G SR4 module?

A 100G CWDM4 module supports single-mode fiber transmission up to 2km, while a 100G SR4 module is designed for multimode fiber with a reach of up to 100m.

Its advantages include: