40G QSFP+

The 40G QSFP+ transceiver module is a hot-swappable, parallel fiber-optical module with four independent optical transmit and receive channels. These channels can terminate in another 40-Gigabit QSFP+ transceiver, or the channels can be broken out to four separate 10-Gigabit SFP+ transceivers. The QSFP+ transceiver module connects the electrical circuitry of the system with either a copper or an optical external network. FiberMart supply high quality QSFP+ transceivers which are used primarily in short reach applications in switches, routers, and data center equipment. These modules provide higher density than SFP+ modules. In today’s high-performance data network scenarios, 40G QSFP+ modules guarantee high-density, cost-effective and low-power 40G data transmission. Understanding the different 40G QSFP+ interface, types, and applications is of prime importance when selecting the best equipment for your data center facility. For more information, pls contact us [email protected]

Introduction

The 40G QSFP+ (Quad Small Form-factor Pluggable Plus) is a compact, hot-swappable optical transceiver module designed for high-speed data centers, high-performance computing networks, and telecom core networks. It supports a 40 Gbps data rate using four independent 10 Gbps lanes, enabling high-density, low-power 40 Gigabit Ethernet, InfiniBand, or Fibre Channel connectivity over single or multiple fibers.

Features

● High Density & Hot-Swappable: Standard QSFP+ form factor allows high port density and can be inserted or removed without powering down the system.

● Low Power Consumption: Typically consumes less than 1.5W, reducing operational costs in data center environments.

● Multi-Protocol Support: Compatible with 40GbE (40GBASE-SR4/LR4/ER4, etc.), InfiniBand EDR, OTU3, and other standards.

● Flexible Reach Options: Available in variants supporting distances from 100 meters (multimode) up to several kilometers (single-mode), suitable for intra-rack to campus interconnects.

● Digital Diagnostics Monitoring (DDM): Built-in real-time monitoring of temperature, voltage, optical power, and other key parameters for easier maintenance.

● Duplex & Parallel Options: Supports both SR4 (parallel multimode) and LR4/ER4 (single-mode CWDM) optical architectures.

Principle

The QSFP+ module receives four lanes of 10 Gbps electrical signals, which are converted into optical signals via laser drivers inside the module. For short-reach multimode transmission (e.g., 40GBASE-SR4), four independent VCSEL lasers are used to transmit over an MPO/MTP multi-fiber ribbon cable. For long-reach single-mode transmission (e.g., 40GBASE-LR4), coarse wavelength division multiplexing (CWDM) technology combines four different wavelengths (1270nm–1330nm) onto a single single-mode fiber, which are then demultiplexed at the receiver. The module integrates clock recovery and signal conditioning circuitry to ensure high-speed signal integrity.

Applications

● Data Center Networks: Used for 40G Ethernet switch stacking, server aggregation, or Spine-Leaf interconnections.

● High-Performance Computing (HPC): Connects compute nodes and storage systems in InfiniBand EDR networks.

● Telecom Core/Aggregation Layers: Supports 40G OTU3 or Fibre Channel links for metro and backbone transport.

● Enterprise & Cloud Networking: Provides high-bandwidth uplinks for virtualization and big-data traffic.

● Storage Area Networks (SAN): Interconnects high-speed storage devices.

Specifications