RoHS-compliant DML optical transceiver modules are available in 50G and 100G QSFP28 configurations, supporting single-mode fiber transmission up to 10–20 km.

Overview

RoHS-compliant optical transceivers are designed to meet the Restriction of Hazardous Substances (RoHS) directive, which limits the use of hazardous materials in electronic components, ensuring environmental safety and regulatory adherence in global markets . DML (Directly Modulated Laser) technology is commonly used in these modules for efficient optical signal generation, particularly in LAN-WDM and PON applications .

Key Features

• Data Rates: Modules are available in 50G and 100G configurations, such as QSFP28 LR4 for 100Gb/s applications .
• Transmission Distance: Typical single-mode fiber reach ranges from 10 km to 20 km, depending on the module and application .
• Wavelengths: DML transmitters operate in the 1295–1310 nm range, with receivers often using APD or PIN photodetectors for high sensitivity .
• Compliance: Modules adhere to RoHS 2 and RoHS 3 directives, ensuring restricted substances like lead, mercury, and cadmium are below maximum allowable concentrations .
• Standards: Many modules comply with IEEE 802.3ba 100GBASE-LR4, ITU-T G.9804.x for PON, and QSFP28 MSA specifications .
• Interface: Hot-pluggable electrical interfaces with 2-wire serial management for monitoring and control .

Applications

• Data Centers: High-speed interconnects for servers and switches.
• Telecommunications: Long-reach optical links in metro and enterprise networks.
• PON Networks: 50G PON ONU links for fiber-to-the-home deployments .

Example Products

• INTCERA 100G QSFP28 LR4 DML 10 km: Converts 4×25Gb/s electrical channels to 4 LAN-WDM optical channels, compliant with IEEE 802.3ba 100GBASE-LR4 .
• Accelink RTXM300-2xx 50G PON QSFP28: RoHS-compliant module with 1300±10 nm DML transmitter and 1342±2 nm APD receiver, supporting up to 20 km single-mode fiber .
• QSFP28 LR4 10 km Optical Fiber Transceiver: Features four EML/DML lasers with multiplexed single-mode fiber output, hot-pluggable interface, and low power consumption . These modules provide a combination of environmental compliance, high-speed performance, and reliable optical transmission, making them suitable for modern network deployments requiring both regulatory adherence and technical efficiency.