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The 400G ER4 – 400Gbps QSFP-DD ER4 Optical Transceiver is a high-performance module designed for ultra-long-distance communication over single-mode fiber (SMF) up to 40 kilometers. It operates at a lane bit rate of 106.25Gbps using PAM4 modulation and features an 8-lane electrical interface (400GAUI-8) for efficient data transmission. The transceiver integrates an EML laser and APD receiver to ensure robust signal integrity and high sensitivity. Compliant with QSFP-DD MSA, IEEE 802.3 standards, and EU Directive 2015/863/EU, this transceiver is ideal for applications like 400GBASE-ER4 Ethernet, 5G backhaul, data center interconnects, and cloud networking.
Operating on a single +3.3V power supply with a maximum power consumption of 12W, the module ensures reliable performance within a temperature range of 0°C to 70°C. It provides advanced digital diagnostic monitoring (DDM) through an I2C interface, enabling real-time monitoring of critical parameters such as temperature, voltage, and optical power. With a duplex LC connector and hot-pluggable QSFP-DD form factor, the transceiver ensures seamless integration into high-speed networking environments. Its adherence to stringent standards and advanced features make it an essential component for next-generation optical communication systems.
All of our optical transceivers come with a lifetime warranty.
The CT-400G-QDD-ER4 is a hot-pluggable optical transceiver compliant with QSFP-DD MSA, designed for high-capacity data center, cloud, and telecom backhaul networks. It provides 400 Gb/s aggregate bandwidth using eight 53.125 Gb/s PAM4 electrical lanes mapped into four LAN-WDM optical channels (1304–1312 nm). The module supports up to 40 km transmission on G.652 SMF with FEC from the host system. Power consumption is ≤ 12 W with a single +3.3 V supply. Integrated digital diagnostics monitoring (DDM) is accessible via I²C.
| Parameter | Value |
|---|---|
| Lane signaling rate | 53.125 GBd (±100 ppm), PAM4 |
| TX avg launch power | 1.5 to 7.1 dBm |
| Outer OMA | 4.5 to 7.9 dBm |
| Extinction ratio | ≥ 6 dB |
| TDECQ / TECQ | ≤ 3.9 dB |
| RX sensitivity (OMAouter) | ≤ −14 dBm |
| RX input power range | −16.2 to −3.4 dBm |
| RX damage threshold | ≥ −2.4 dBm |
| LOS assert / de-assert | −30 / −17 to −20 dBm |
| SMSR | ≥ 30 dB |
At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.
We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.
At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.
Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:
Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.
Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.
At Carritech Optics, every product we supply undergoes a meticulous testing process designed to guarantee exceptional quality, reliability, and consistency. Our manufacturer operates within a professional laboratory environment, where advanced testing equipment and industry-standard procedures are used to carefully evaluate each item.
Carritech’s Opticode is an advanced transceiver programming solution that gives you complete flexibility across your optical network. Designed to ensure seamless compatibility with a wide range of OEM systems, Opticode allows you to quickly reconfigure transceivers to meet your specific requirements. The result is greater control, reduced costs, and a more adaptable, future-proof infrastructure.
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