Single-mode fiber optic cable 40g

Single-mode 40G fiber optic solutions, such as QSFP-40G-LR4, enable high-speed 40Gbps transmission over single-mode fiber for distances up to 10km, ideal for data center interconnects and enterprise backbone networks.

Overview

Single-mode 40G fiber optic modules are high-speed optical transceivers designed to transmit and receive data at 40Gbps over a single strand of single-mode fiber. They typically operate at 1310nm using CWDM technology and are standardized under 40GBASE-LR4. These modules split the 40Gbps signal into four 10Gbps lanes, each carried on a different wavelength, which are multiplexed and demultiplexed inside the transceiver for efficient long-distance transmission .

Key Features

• Transmission Distance: Up to 10km over standard single-mode fiber, making them suitable for medium-range backbone and interconnect applications .
• Connector Types: Commonly use LC duplex or MPO connectors for easy integration into existing fiber infrastructure .
• Standards Compliance: Fully compliant with IEEE 802.3ba, MSA, and other QSFP standards, ensuring interoperability across different vendors .
• Deployment Flexibility: Single-mode 40G modules are more cost-effective and easier to deploy than ultra-long-reach options like 40G ER4, while exceeding the reach of multimode SR4 modules .
• Space and Cost Efficiency: Using a single fiber strand reduces cabling complexity and saves rack space, which is critical in high-density data centers .

Applications

• Data Center Interconnects (DCI): Connecting multiple data centers or high-performance computing clusters.
• Enterprise Backbone Networks: Supporting high-speed aggregation and core layers.
• Service Provider Networks: Aggregation and metro networks where multimode fiber cannot meet distance requirements .

Popular Modules

• QSFP-40G-LR4: Supports 10km over single-mode fiber, LC duplex interface, CWDM at 1310nm, widely used for backbone and aggregation layers .
• Cisco-Compatible Options: Third-party modules like FluxLight QSFP-40G-LR4-S-FL offer full compatibility with Cisco and other OEM switches, pre-programmed for seamless integration .

Advantages

• High-Speed Transmission: 40Gbps over long distances.
• Ease of Deployment: Standard connectors and MSA compliance simplify upgrades.
• Cost-Effective: Balances distance, performance, and price compared to ultra-long-reach solutions.
• Scalable: Supports future network growth without major infrastructure changes . Single-mode 40G fiber optic modules are the preferred choice when longer reach, high reliability, and cost efficiency are required, bridging the gap between short-reach multimode solutions and ultra-long-reach optics.