40GBASE-LR4 QSFP+ Transceiver: 40G-QSFP-10

Our EDGEOPTIC 40G-QSFP-10 is a multi-vendor compatible 40GBASE-LR4 QSFP+ optical transceiver module designed for long-reach 40 Gigabit Ethernet applications over single-mode fiber infrastructure. The 40G-QSFP-10 module utilizes four-channel CWDM technology operating at 1271nm, 1291nm, 1311nm, and 1331nm wavelengths for both transmission and reception, supporting data rates up to 44.8 Gbps across various network protocols and applications. Our 40GBASE-LR4 QSFP+ transceiver employs DFB (Distributed Feedback) laser technology for transmission and PIN photodiode receivers, optimized for metropolitan and regional network connectivity.

The transceiver ensures a 6.6 dB guaranteed optical link budget, which determines the maximum transmission distance capabilities. Over standard single-mode fiber, the module reliably achieves distances up to 10 kilometers, providing robust connectivity for campus backbones and metropolitan area networks. However, distance is just an indicative parameter calculated for convenience of identification – ultimately we calculate distance considering minimum optical budget and average attenuation of optical cabling in the industry.

40G-QSFP-10 compatible 40GBASE-LR4 module features hot-pluggable QSFP+ form factor with duplex LC/UPC connectors, significantly simplifying fiber infrastructure management compared to parallel optics alternatives. The electrical interface conforms to INF-8438i and SFF-8436 MSA (Multi-Source Agreement) specifications, ensuring seamless compatibility with standard QSFP+ host systems across multiple vendor equipment platforms. Our 40GBASE-LR4 QSFP+ transceiver can be encoded to be compatible and successfully operate in over 80 different brands of networking equipment.

The module incorporates advanced DDM/DOM (Digital Diagnostic Monitoring) functionality providing real-time operational data including per-channel transmitted and received optical power levels, module temperature, laser bias current, and supply voltage monitoring. This comprehensive diagnostic information is accessible via MSA-compatible EEPROM interface, enabling proactive performance monitoring and predictive maintenance strategies. Operating within a standard 0 to 70°C temperature range with single +3.3V power supply, the module delivers consistent performance in controlled telecommunications and data center environments.

Standards compliance encompasses IEEE 802.3ba for 40 Gigabit Ethernet, alongside OTU3/OTU3e2 support at 43.01/44.58 Gbps for Optical Transport Networks and STM-256 compatibility for SDH/SONET applications at 39.81 Gbps. The transceiver achieves extensive multi-vendor interoperability through strict adherence to QSFP+ MSA standards, though equipment with proprietary module verification may require custom EEPROM programming for complete compatibility. Our 40G QSFP-10 transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Primary deployment scenarios include data center interconnects, metropolitan area networks, enterprise campus backbones, and service provider aggregation networks. The 10-kilometer reach with duplex LC connectivity provides cost-effective 40G solutions for existing single-mode fiber infrastructure while CWDM technology maximizes spectral efficiency. Because our focus is delivering superior quality service, we perform comprehensive quality checks before shipment including optical parameter measurements, connector cleanliness inspection, and QSFP+ transceiver EEPROM memory validation testing.