Price list for 40G coherent optical modules for data center interconnection

40G QSFP+ coherent optical modules for DCI typically range from $200 to $1,200 per module depending on type, distance, and vendor.

Overview of 40G QSFP+ Modules

40G QSFP+ (Quad Small Form-factor Pluggable Plus) modules are widely used in data center interconnection (DCI) to provide high-speed 40Gbps links. They come in several types based on transmission distance and fiber compatibility:

• SR4 (Short Reach): Uses multi-mode fiber (OM3/OM4) for distances up to 100–150 meters. Ideal for intra-data center connections. Modules like 40GBASE-SR4 QSFP+ typically cost $200–$400 per unit (Transceiver USA, FiberMall) .
• LR4 (Long Reach): Uses single-mode fiber with LC connectors for distances up to 10 km. Suitable for inter-building or campus DCI links. Prices generally range from $500–$800 per module .
• ER4 (Extended Reach): Single-mode fiber modules capable of 40 km transmission, often used for metropolitan or long-haul DCI. These modules are more expensive, typically $900–$1,200 per unit (QSFPTEK, Cisco-compatible) .

Vendor Compatibility and Features

Most 40G QSFP+ modules are compatible with major switch brands such as Cisco, Juniper, Arista, Ubiquiti, and Edge-Core. Professional-grade modules are tested for OUI code matching to ensure seamless integration and stable 40Gbps performance . Key features include:

• Hot-pluggable design for easy installation and replacement without downtime .
• 4x10G lane architecture, allowing breakout into four 10G connections for flexible network design .
• Low power consumption, typically under 3.5W for ER4 modules .
• Support for DOM/DDM (Digital Optical Monitoring) for real-time diagnostics .

Purchasing Considerations

• Distance requirements: Choose SR4 for short intra-rack links, LR4 for inter-building, and ER4 for long-haul DCI.
• Fiber type: Multi-mode for SR4, single-mode for LR4/ER4.
• Vendor compatibility: Ensure modules match your switch brand to avoid interoperability issues.
• Bulk orders: Prices may decrease with volume purchases, especially for enterprise deployments. For detailed pricing and stock availability, vendors like Transceiver USA and FiberMall provide direct listings and purchase options for 40G QSFP+ modules .