Eoptolink EOLD-134HG-02-M55 400G QSFP-DD Optical Transceiver Module

Eoptolink EOLD-134HG-02-M55 is a high-speed 400G QSFP-DD optical transceiver designed for 4x100G DR4+ applications. This module is part of the EOLD-134HG-02-MXX series and is optimized for long-distance data center interconnects, providing a transmission reach of up to 2 km over single-mode fiber (SMF).

Core Technical Specifications
------------------------------------------
The M55 variant shares its fundamental architecture with the wider 400G DR4+ 2km series:

* Data Rate: Supports aggregate data rates up to 425 Gbps.

* Wavelength: 1310 nm.

* Transmission Distance: 2 km over standard G.652 single-mode fiber (SMF).

* Form Factor: QSFP-DD (Quad Small Form-factor Pluggable Double Density).

* Optical Connector: MPO-12 (specifically supports parallel SMF).

* Power Consumption: Typically less than 8W (Max < 10W at 70°C).

* Operating Temperature: 0°C to 70°C (Commercial case temperature range).

Interface and Functional Design
------------------------------------------
* Electrical Interface: Consists of 8 independent input/output channels at the host side, each operating at a data rate of 53.125 Gbps (PAM4).

* Integrated Gearbox: Includes a DSP with an integrated Gearbox that converts the 8x53.125 Gbps (PAM4) electrical lanes into 4x106.25 Gbps (PAM4) parallel optical lanes.

* Compliance: Fully compliant with the QSFP-DD MSA and IEEE 802.3bs (400GAUI-8) protocols.

* Break-out Capability: Supports "break-out" applications, allowing a single 400G port to be split into 4 independent 100G lanes (e.g., to QSFP28-FR-100G).

Diagnostic and Safety Features
------------------------------------------
* Monitoring: Features an I2C interface with integrated Digital Diagnostic Monitoring (DDM/DOM).

* Safety Standards: Safety certified by TUV, UL, and the FDA, and it is fully RoHS compliant.