Lumentum 100G LR4 Optical Transceiver (1309nm, 10km, Duplex LC, QSFP28)

About Lumentum 100G LR4 Optical Transceiver in Bangladesh

The Lumentum 100G LR4 Optical Transceiver is a high-performance QSFP28 optical module designed for 100 Gigabit Ethernet connectivity over single-mode fiber. It supports 100GBASE-LR4 and provides transmission distances of up to 10km using a duplex LC optical interface.

The Lumentum 100G QSFP28 LR4 uses an integrated LAN-WDM optical architecture with four wavelengths centered around 1296nm, 1300nm, 1305nm and 1309nm. The four optical lanes are multiplexed onto a single duplex single-mode fiber connection, providing high-density 100GbE connectivity for enterprise and data center networks. Lumentum's published QSFP28 LR4 documentation specifies support for 100GBASE-LR4, up to 10km over SMF, duplex single-mode LC and an operating temperature range of 0°C to 70°C. Lumentum QSFP28 LR4 datasheet

Lumentum 100G LR4 QSFP28 Specifications & Features

Overview

The Lumentum 100G LR4 QSFP28 transceiver provides a 100GbE optical interface for networks requiring significantly greater bandwidth than 40GbE or 10GbE while maintaining a compact QSFP28 form factor.

The module supports 100GBASE-LR4 over single-mode fiber with a maximum specified reach of 10km. Lumentum documentation identifies the module as a full-duplex photonic-integrated transceiver supporting both 100GBASE-LR4 and OTU4 line rates. Lumentum technical documentation

Buy Lumentum 100G LR4 QSFP28 Transceiver in Bangladesh

Purchase the Lumentum 100G LR4 Optical Transceiver from Datacom Technologies (BD). We supply enterprise optical transceivers, QSFP28 modules, SFP/SFP+ optics, fiber networking products and data center connectivity solutions throughout Bangladesh.

Key Features

• 100Gbps high-speed optical connectivity
• 100GBASE-LR4 support
• QSFP28 high-density form factor
• Up to 10km transmission distance
• Single-mode fiber support
• Duplex LC connector
• Four LAN-WDM optical lanes
• 1296nm / 1300nm / 1305nm / 1309nm lane wavelengths
• DOM/DDM monitoring
• Hot-pluggable design
• 0°C to 70°C commercial operating temperature
• Low-power operation below 4W
• Suitable for data center interconnects
• Suitable for enterprise 100GbE uplinks

100GBASE-LR4 Technology

100GBASE-LR4 combines four optical wavelengths into a single 100Gbps-class connection. Each optical lane carries approximately 25Gbps, while the internal multiplexer combines the four lanes onto a duplex single-mode fiber pair.

This architecture allows 100GbE connectivity over significantly longer distances than short-range 100G SR4 modules while requiring only a standard duplex LC fiber connection.

1310nm Optical Technology

The Lumentum LR4 module is commonly described as a 1310nm-class transceiver. Rather than using a single optical wavelength, LR4 employs four LAN-WDM channels centered around 1296nm, 1300nm, 1305nm and 1309nm. Lumentum's datasheet specifies these four center wavelengths for its 100G QSFP28 LR4 module. Lumentum LR4 datasheet

10km Single-Mode Fiber Reach

The transceiver supports transmission distances of up to 10km over compatible single-mode fiber. This makes it appropriate for data center interconnection, campus networking, enterprise WAN links and long-distance switch-to-switch connections.

The actual achievable distance depends on fiber attenuation, connector losses, splice losses and the total optical power budget of the link.

Duplex LC Connector

The Lumentum 100G LR4 uses a duplex LC optical interface. One fiber carries the transmit path and the other carries the receive path.

This makes the module particularly convenient for installations where existing duplex single-mode LC infrastructure is already available.

LAN-WDM Four-Lane Architecture

The optical transmitter uses four LAN-WDM channels centered at approximately 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm. These channels are internally multiplexed for transmission through the duplex LC interface. Lumentum optical specifications

The four-lane design enables high-density 100GbE transmission while maintaining the compact QSFP28 form factor.

Optical Performance

Published Lumentum LR4 documentation specifies a full-duplex 100G optical interface with up to 10km reach over SMF and low-power operation below 4W. Lumentum technical documentation

For standard LR4 implementations, comparable QSFP28-LR4 specifications commonly specify per-lane transmitter output around -4.3dBm to +4.5dBm and receiver sensitivity around -8.6dBm to -10.6dBm depending on the specific implementation. These values should be verified against the exact Lumentum module revision before designing an optical link budget.

Digital Optical Monitoring

The module includes digital optical monitoring functionality, allowing compatible networking equipment to retrieve diagnostic information from the transceiver.

Depending on the host platform, DOM/DDM information may include module temperature, supply voltage, laser bias and transmit/receive optical power. The Lumentum module uses a 2-wire serial management interface for transceiver monitoring and configuration. Lumentum QSFP28 LR4 documentation

Low-Power QSFP28 Design

The Lumentum 100G LR4 is designed for high-density networking environments with power dissipation below 4W. This makes it appropriate for data center switches and routers where many 100G interfaces may be installed in the same chassis.

Enterprise & Data Center Applications

• 100GbE switch-to-switch links
• Data center interconnects
• Leaf-and-spine network architectures
• Core network uplinks
• Enterprise network aggregation
• High-performance computing networks
• Cloud infrastructure
• Server and storage network uplinks
• Campus network interconnection
• Telecom client-side connectivity

100G LR4 vs 100G CWDM4

For links longer than approximately 2km, 100GBASE-LR4 is generally the more appropriate standard compared with CWDM4, assuming the optical budget and host equipment support it.

Compatibility

The Lumentum 100G LR4 is based on the standardized QSFP28 100GBASE-LR4 interface. However, optical module coding and firmware compatibility can vary between switch, router and NIC manufacturers.

Always verify the exact host equipment's supported optics list and vendor coding requirements before purchasing. A physically compatible QSFP28 port does not necessarily guarantee that every vendor-coded optical module will be accepted.

Installation Considerations

• Use compatible single-mode fiber.
• Use duplex LC connectors.
• Verify the host supports 100GBASE-LR4 QSFP28 optics.
• Check the complete optical power budget.
• Clean LC connectors before installation.
• Confirm vendor coding and firmware requirements.
• Verify DOM/DDM support on the host if diagnostics are required.
• Do not exceed the transceiver's maximum receiver input power.

Benefits

• 100Gbps high-speed networking
• 10km single-mode fiber reach
• 1310nm-class LAN-WDM optics
• Duplex LC connectivity
• Compact QSFP28 form factor
• DOM/DDM monitoring
• Low-power operation
• Hot-pluggable installation
• Ideal for data center interconnects
• Suitable for enterprise 100GbE uplinks
• Suitable for cloud and HPC networks

Why Buy from Datacom Technologies (BD)?

Datacom Technologies (BD) supplies enterprise optical networking products in Bangladesh, including Lumentum-compatible QSFP28 transceivers, 100G LR4 modules, SFP/SFP+ optics, fiber networking components, switches and data center connectivity solutions. Customers can receive competitive pricing, technical consultation, deployment assistance and nationwide delivery.

• Call/WhatsApp: +8801748173213
• Email: sales@datacom.com.bd
• Alternative Email: datacomtechnologiesbd@gmail.com
• Office: Tropical Center, 218, Dr. Kudroti Khuda Road, New Elephant Road, Dhaka-1205, Bangladesh

Frequently Asked Questions (FAQ)

Q1: What is the Lumentum 100G LR4 transceiver?
It is a 100Gbps QSFP28 optical transceiver designed for 100GBASE-LR4 connectivity over single-mode fiber.

Q2: What is the maximum transmission distance?
The module supports up to 10km over compatible single-mode fiber.

Q3: What wavelength does the Lumentum LR4 use?
It uses four LAN-WDM wavelengths centered around 1296nm, 1300nm, 1305nm and 1309nm, commonly described as 1310nm-class optics.

Q4: What type of fiber does it require?
It requires compatible Single-Mode Fiber (SMF).

Q5: What connector does it use?
The transceiver uses a duplex LC connector.

Q6: Does the Lumentum 100G LR4 support DOM?
Yes. The module provides digital diagnostic/monitoring functionality through its management interface.

Q7: What is the operating temperature?
The Lumentum LR4 module is specified for commercial operation from 0°C to 70°C.

Q8: How much power does it consume?
Lumentum documentation specifies power dissipation below 4W.

Q9: Can it be used with multimode fiber?
No. 100GBASE-LR4 is designed for single-mode fiber. For short-range multimode 100G links, a 100GBASE-SR4 module is normally used.

Q10: Is LR4 the same as CWDM4?
No. Both use four optical wavelengths and duplex LC SMF, but LR4 is designed for up to 10km while CWDM4 is generally specified for up to 2km.

Q11: Is the module hot-pluggable?
Yes. The QSFP28 form factor is designed for hot-plug installation in compatible networking equipment.

Q12: Where can I buy the Lumentum 100G LR4 in Bangladesh?
You can contact Datacom Technologies (BD) for Lumentum-compatible 100G LR4 QSFP28 transceivers, enterprise optical modules and data center networking solutions with nationwide delivery.