746961-001 HPE QSFP+ Transceiver Module 40GB/S 40GBase-LR4 SMF LC Connector

HPE 746961-001 LC Connector Transceiver Module

Enterprise-Class 40G Optical Connectivity for Modern Data Center Infrastructure

The HPE 746961-001 40GB/S 40GBase-LR4 QSFP+ transceiver module represents a critical component in high-speed optical networking environments where bandwidth density, transmission reliability, and long-reach connectivity are essential. Designed for enterprise and carrier-grade deployments, this QSFP+ optical module enables seamless 40 Gigabit Ethernet communication over single-mode fiber infrastructure using LC duplex connectivity, supporting modern data center interconnect (DCI) architectures and high-capacity switching fabrics.

As data traffic continues to grow due to virtualization, cloud computing, artificial intelligence workloads, and distributed storage systems, the demand for stable and efficient 40G optical transceivers has significantly increased. The HPE 746961-001 is engineered to meet these evolving requirements by delivering low-latency optical transmission, enhanced signal integrity, and compatibility with high-density HPE switching platforms.

QSFP+ 40GBase-LR4 Optical Technology

QSFP+ Form Factor Design Efficiency

The Quad Small Form-factor Pluggable Plus (QSFP+) architecture used in the HPE 746961-001 module is optimized for compact, high-density networking environments. This design integrates four independent transmit and receive channels into a single module, allowing aggregation of 10G signals into a unified 40G Ethernet link. The compact footprint enables network engineers to maximize port density on compatible switches without compromising thermal efficiency or signal stability.

40GBase-LR4 Long Reach Transmission Capability

The 40GBase-LR4 standard is specifically developed for long-reach optical transmission over single-mode fiber (SMF). The LR4 specification allows data transmission over distances typically reaching up to 10 kilometers depending on fiber quality and network conditions. This makes the module suitable for inter-building connectivity, campus networks, and metro aggregation links where extended reach is required without signal regeneration.

LAN-WDM Wavelength Multiplexing Technology

The LR4 implementation uses LAN-Wavelength Division Multiplexing (LAN-WDM) technology, which enables four distinct wavelengths to carry independent 10G signals simultaneously. These wavelengths are multiplexed into a single optical stream transmitted through LC duplex connectors. At the receiving end, the optical signal is demultiplexed into four channels, ensuring efficient data separation and reconstruction with minimal latency and signal loss.

HPE 746961-001

Single-Mode Fiber Compatibility

This transceiver module is engineered for single-mode fiber applications, ensuring optimal long-distance transmission performance. Single-mode fiber provides a narrow core that minimizes modal dispersion, allowing light to travel in a straight path with reduced attenuation. This physical property enhances the reliability of 40G transmissions over extended distances, making the module ideal for backbone infrastructure and interconnectivity between geographically separated data centers.

LC Duplex Connector Interface

The LC duplex connector interface provides a standardized and highly reliable physical connection between the transceiver and fiber optic cabling. Known for its compact size and high precision alignment, the LC connector ensures stable optical coupling and reduced insertion loss. This contributes to consistent signal quality and improved overall network performance in demanding enterprise environments.

Hot-Pluggable QSFP+ Module Design

The HPE 746961-001 supports hot-pluggable functionality, allowing installation or replacement without powering down network equipment. This feature significantly reduces downtime in production environments and supports continuous network availability. The module is designed to integrate seamlessly into compatible HPE switches and routers, automatically negotiating link parameters upon insertion.

40GBase-LR4 Optical Transceiver Modules

Data Center Spine and Leaf Architectures

Modern spine-leaf data center architectures rely heavily on high-bandwidth, low-latency interconnects. The HPE 746961-001 supports these environments by providing high-speed links between spine and leaf switches, ensuring balanced traffic distribution and scalable network expansion without bottlenecks.

Cloud Infrastructure and Virtualization Platforms

Cloud service providers and enterprise virtualization environments require robust network backbones capable of handling dynamic workloads. This transceiver supports virtualization clusters, hyper-converged infrastructure systems, and software-defined networking environments where rapid data exchange is essential.

Metro and Campus Network Connectivity

The long-reach capabilities of the LR4 standard make this module suitable for campus and metro area networks where inter-building or inter-site connectivity is required. Organizations with distributed offices, research facilities, or educational campuses benefit from stable high-speed optical links.

High-Performance Computing Clusters

High-performance computing environments demand extremely fast data exchange between compute nodes. The HPE 746961-001 enables efficient interconnects in clustered computing systems used for scientific simulations, machine learning workloads, and large-scale data processing.

Signal Integrity and Optical Engineering Considerations

Dispersion Management in Long-Distance Transmission

Single-mode fiber transmission over long distances introduces challenges such as chromatic dispersion. The LR4 design compensates for these effects through precise wavelength allocation and optical engineering techniques that preserve signal integrity across extended links.

Error Reduction and Signal Stability

The module incorporates advanced optical signal processing techniques to reduce bit error rates and maintain stable data transmission. This ensures reliable communication even in high-interference environments or when operating near maximum distance thresholds.

Scalability and Future Network Expansion

Network Growth Strategies

As organizations scale their digital infrastructure, the need for scalable optical interconnects becomes increasingly important. This transceiver supports network expansion by enabling additional 40G links without requiring major architectural redesigns.

Transition Pathways to Higher-Speed Ethernet

The 40GBase-LR4 module plays a transitional role in evolving networks moving toward 100G and beyond. It allows organizations to incrementally upgrade their infrastructure while maintaining operational continuity and cost efficiency.

Modular Upgrade Flexibility

The QSFP+ form factor provides modular flexibility, allowing network administrators to replace or upgrade transceivers without replacing entire switch systems. This modularity reduces capital expenditure and extends the lifecycle of networking hardware investments.