400G QSFP112 DR4 500m Optical Transceiver 1310nm PAM4 MPO-12 SMF Module

• Supports 400Gbps Ethernet optical transmission
• Designed for 400G DR4 short-reach single-mode fiber applications
• Supports transmission distances up to 500m over SMF
• Uses four independent 1310nm EML optical transmitters
• Four-channel parallel optical transmission architecture
• Supports 4 × 100G PAM4 retimed 400GAUI-4 electrical interface
• QSFP112 compact form factor for high-density 400G deployments
• MPO-12 optical connector for efficient parallel fiber connectivity
• PAM4 modulation technology for high-speed optical transmission
• Integrated I2C management interface for monitoring and configuration
• Hot-pluggable design enables easy installation and replacement

• 400G Ethernet data center networks
• Hyperscale cloud computing infrastructure
• AI and machine learning clusters
• High-performance computing (HPC) networks
• Data center spine-leaf interconnects
• Switch-to-switch optical connections
• Enterprise backbone networks
• High-bandwidth server aggregation systems

FiberMania provides OEM and customized QSFP112 optical transceiver solutions for data center operators, network equipment manufacturers, and system integrators. Customization options include firmware programming, I2C parameter configuration, EEPROM customization, product labeling, packaging solutions, and compatibility optimization for different Ethernet switching platforms.

What is the difference between 400G DR4 and FR4 optical transceivers?

The main difference is the optical transmission technology and fiber configuration. DR4 uses four parallel 1310nm optical lanes over single-mode fiber with an MPO-12 interface and supports shorter links up to 500m. FR4 uses wavelength multiplexing technology with four CWDM wavelengths and a Duplex LC interface, typically supporting longer distances such as 2km or more.

Why does the 400G QSFP112 DR4 module use single-mode fiber?

Single-mode fiber provides lower transmission loss and higher bandwidth capability compared with multimode fiber, allowing the module to achieve 500-meter transmission distances while maintaining reliable 400G performance.

What is the role of the EML transmitter in this module?

The EML (Electro-Absorption Modulated Laser) transmitter provides high-speed optical modulation with excellent wavelength stability and signal quality. It is commonly used in higher-performance optical modules requiring reliable 100G-per-lane transmission.

Is this module compatible with QSFP-DD ports?

The QSFP112 and QSFP-DD are different electrical and mechanical form factors designed for different generations of high-speed networking equipment. Compatibility depends on the host switch or system platform and should be verified before deployment.

What type of cabling is required for the MPO-12 interface?

The module requires compatible MPO-12 single-mode fiber cabling. Proper polarity and fiber configuration should be selected according to the network design to ensure correct four-lane optical transmission.