The FS QDD-DR4-400G-Si Compatible LINK-PP module is a commercial-grade 400GBASE-DR4 QSFP-DDoptical transceiver specifically designed for high-speed, high-density networks. Operating at a 1310nm wavelength, this advanced silicon photonics module supports up to 500m transmission distances over single-mode fiber. Featuring an MPO-12/APC optical interface and a low 10W maximum power consumption, it ensures highly efficient data center connectivity.
FS Part Number
QDD-DR4-400G-Si
Vendor Name
LINK-PP
Form Factor
QSFP-DD
Max Data Rate
425Gbps
Wavelength
1310nm
Max Cable Distance
500m
Connector
MPO-12/APC
Media
SMF
Transmitter Type
DFB
Receiver Type
PIN
Modulation (Electrical)
8x50G-PAM4
Modulation (Optical)
4x100G-PAM4
DSP
TX and RX
Host FEC
Supported
DDM/DOM
Supported
Operating Temperature Range
0°C to +70°C
Protocols
QSFP-DD MSA, IEEE 802.3bs, CMIS 4.1
Warranty
5 Years
Key Features of FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD
The QDD-DR4-400G-Si delivers outstanding performance through advanced silicon photonics technology, integrating a DFB laser and PIN detector. It fully complies with IEEE 802.3bs 400GBASE-DR4 standards and QSFP-DD MSA. Built-in digital diagnostic monitoring allows real-time network management, making this transceiver ideal for enterprise infrastructure.
Utilizing cutting-edge silicon photonics technology, the FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD module achieves exceptional signal integrity and low power consumption. This architecture minimizes thermal output while maximizing bandwidth density for next-generation network upgrades.
QDD-DR4-400G-Si: 400G Connectivity for Data Center Interconnects
Engineered for demanding environments, the QDD-DR4-400G-Si provides robust 400G connectivity essential for modern data center interconnects. This reliable optical transceiver seamlessly supports high-capacity InfiniBand and spine-leaf Ethernet architectures, ensuring uninterrupted enterprise networking and rapid data transfer.
QDD-DR4-400G-Si Module with 1310nm Wavelength
Operating effectively at a central 1310nm wavelength, the QDD-DR4-400G-Si module utilizes four parallel optical lanes. Integrated with 106.25Gbps PAM4 modulation, this configuration ensures precise signal transmission and minimal dispersion across your high-speed fiber optic infrastructure.
The QDD-DR4-400G-Si module guarantees reliable data delivery supporting up to 500m transmission distances on single-mode fiber (SMF). When paired with host-system Forward Error Correction (FEC), it maintains a strict post-FEC bit error rate for long-range connectivity.
QDD-DR4-400G-Si Module with MPO-12/APC Interface
Featuring a standard MPO-12/APC interface, the QDD-DR4-400G-Si module facilitates quick and secure physical connections. The angled physical contact minimizes optical return loss, significantly improving the overall signal quality within dense 400GBASE-DR4 patching environments.
QDD-DR4-400G-Si Module with DOM for Real-Time Monitoring
Equipped with comprehensive Digital Optical Monitoring (DOM), the QDD-DR4-400G-Si module enables network administrators to perform real-time monitoring. You can accurately track critical operating parameters like temperature, voltage, and laser power to proactively manage transceiver health.
The FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD optical transceiver holds extensive global certifications, ensuring it meets strict safety, environmental, and international quality standards for enterprise-grade network deployments worldwide.
Every QDD-DR4-400G-Si undergoes a rigorous quality testing program before shipment. This comprehensive evaluation ensures optimal optical performance and strict adherence to QSFP-DD MSA electrical interface specifications.
QDD-DR4-400G-Si Quality Certifications
The QDD-DR4-400G-Si complies with industry-leading quality certifications, including CE, FCC, UKCA, UL, REACH, and RoHS. It also strictly satisfies Laser Safety Class 1 requirements for secure operational handling.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
QDD-DR4-400G-Si Certified for Reliable Host-Device Compatibility
Fully certified for reliable host-device compatibility, the QDD-DR4-400G-Si integrates seamlessly into major switch and router brands. It supports stable 400GAUI-8 electrical interfaces without firmware conflict issues.
Our strict verification procedures guarantee that every 400G transceiver delivers reliable QSFP-DD performance under demanding real-world data center networking workloads.
Optical Spectrum Test
This verifies the 1310nm central wavelength accuracy and confirms exceptional side-mode suppression ratio performance.
Eye Pattern Test
We validate the PAM4 optical modulation amplitude to ensure minimal transmitter and dispersion eye closure.
Bit Error Rate Test
This crucial test confirms the post-FEC bit error rate remains strictly below the 1E-12 threshold.
Temperature Test
We evaluate commercial-grade stability, ensuring flawless transceiver functionality across the entire 0°C to 70°C range.
Product Shipping for FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD
We utilize secure packaging and trusted logistics partners to ensure your FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD transceivers arrive safely and promptly at your facility.
Anti-Static Protective Packaging
Each module is sealed in premium electrostatic discharge bags preventing electronic damage.
Shock-Resistant Transport Protection
Custom-fitted shock-absorbent foam inserts protect the delicate silicon photonics during transit.
Fast Order Processing and Dispatch
We ensure rapid inventory handling and swift dispatch for all enterprise orders.
Global Logistics and International Delivery
Partnered with top couriers, we provide reliable and trackable worldwide shipping solutions.
Deploying the FS QDD-DR4-400G-Si Compatible LINK-PP 400G QSFP-DD is straightforward with its hot-pluggable design. Simply insert the transceiver into a compatible host port and connect your single-mode fiber using the MPO-12/APC interface for immediate, high-speed network integration.
QDD-DR4-400G-Si Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable QDD-DR4-400G-Si modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
Yes! Our 400GBASE-DR4 modules are 100% MSA compliant and fully factory-coded to ensure seamless compatibility and interoperability across major OEM brands like Cisco, Arista, and Juniper without triggering any lock-out warnings. By
admin
A:
This silicon photonics transceiver is designed exclusively for Single Mode Fiber (SMF) up to 500m. It requires an MPO-12/APC (Angled Physical Contact) connector to minimize return loss; a UPC connector will not work properly here. By
admin
A:
This specific SKU supports commercial operating temperatures (0°C to 70°C). However, we do manufacture industrial-grade (-40°C to 85°C) 400G optics for harsh outdoor environments. Just reach out to our support team for the exact industrial SKU. By
admin
A:
Definitely. The LQD-M31400-DR4SC complies strictly with the IEEE 802.3bs 400GBASE-DR4 specifications, QSFP-DD MSA, and CMIS 4.0, ensuring full industry compliance for standard optical networks. By
admin
Please write comments with more than three
character.
495447
516817
R***e
Greece
Verified
Purchase
5 .0
2026-07-05
Pushed this 400G QSFP-DD silicon photonics transceiver to its absolute limit across a 500m SMF span. Strict IEEE compliance verified, and our multibrand switch compatibility test passed with flying colors!
Please write comments with more than three
character.
495447
516822
J***s
Singapore
Verified
Purchase
5 .0
2026-06-04
We needed reliable 1310nm SMF modules for a rugged outdoor cabinet deployment. Despite fluctuating operating temperatures, the 8x50G PAM4 modulation remains rock solid. Exceptional value for high-density 400G fiber networks.
Please write comments with more than three
character.
495447
516811
J***n
Ecuador
Verified
Purchase
5 .0
2026-05-13
Running a massive data center interconnect project requiring robust MPO-12/APC interfaces. These 400GBASE-DR4 optics maintain flawless 425Gbps throughput with perfect DOM diagnostics even under heavy core network loads.
Please write comments with more than three
character.
495447
516818
B***a
Brazil
Verified
Purchase
5 .0
2026-05-13
Tested the MSA compliant Link-PP QSFP-DD against OEM optics in Juniper equipment. The 500m reach, DDM precision, and overall optical power levels are indistinguishable. Excellent choice for large-scale enterprise upgrades.
United Kingdom · English · GBP
