40G QSFP+ ER4 40km CWDM 1310nm Optical Transceiver with Duplex LC for 40GBASE-ER4 Ethernet

• Supports 40Gb/s high-speed Ethernet data transmission
• QSFP+ hot-pluggable form factor for easy installation and maintenance
• Supports transmission distances up to 40km over single-mode fiber (SMF)
• 4-channel CWDM MUX/DEMUX optical architecture for parallel transmission
• Operates in the 1310nm wavelength band for efficient optical networking
• Integrated CWDM laser transmitter for stable long-distance transmission
• APD photodetector receiver provides high optical sensitivity
• Duplex LC optical interface compatible with standard SMF cabling
• Single +3.3V power supply with optimized power efficiency
• Built-in Digital Diagnostic Monitoring (DDM) for real-time operating status
• Designed for 40GBASE-ER4 Ethernet network applications

• 40G Ethernet backbone connections
• Data center interconnect (DCI)
• Enterprise campus network backbones
• Metropolitan Area Networks (MAN)
• Long-distance server and switch connections
• Optical transport network extensions
• High-capacity single-mode fiber communication systems

We offer comprehensive OEM and customization services to support different network equipment requirements and deployment scenarios. The 40G QSFP+ ER4 optical transceiver can be customized with specific EEPROM coding, vendor compatibility programming, product labeling, housing marks, and packaging solutions.

For large-scale network projects, we provide customized testing and compatibility verification with various switches, routers, and optical transport platforms to ensure reliable integration into existing fiber optic infrastructures.

What is the difference between 40G QSFP+ ER4 and LR4 optical transceivers?

Both ER4 and LR4 modules use a 4-lane optical architecture, but the ER4 version is optimized for longer transmission distances. The 40G QSFP+ ER4 supports up to 40km transmission, while LR4 modules are typically designed for shorter distances around 10km.

Why does the 40G QSFP+ ER4 use an APD receiver?

An APD (Avalanche Photodiode) receiver provides higher sensitivity compared with standard PIN photodiodes. This allows the module to maintain reliable signal reception over longer fiber links with higher optical loss.

Can this module be used with existing single-mode fiber infrastructure?

Yes. The module is designed for standard single-mode fiber (SMF), typically OS2 fiber, making it suitable for deployment in existing long-distance fiber networks without requiring new cabling.

What does the CWDM 4-lane architecture mean in this transceiver?

The 4-lane CWDM architecture uses four separate wavelength channels in the 1310nm band to transmit and receive data in parallel. Each optical lane carries a portion of the total 40Gbps data stream, which is combined through internal MUX/DEMUX components.

Does this QSFP+ ER4 transceiver support network monitoring?

Yes. The built-in Digital Diagnostic Monitoring (DDM) function allows administrators to monitor key operating parameters, including temperature, supply voltage, transmitter bias current, and optical power levels.

Can the module be customized for different switch brands?

Yes. We can provide customized coding and compatibility options for various networking platforms. Customers can specify their target equipment models to ensure proper interoperability before deployment.