100G PAM4 Modulation: Enhancing Spectral Efficiency in Links
April 20, 2026
Learn what 100G PAM4 modulation is, how it works, and why it improves link efficiency, bandwidth use, and modern optical network performance.
1.6T Optical Transceiver Roadmap for Future Data Centers
April 16, 2026
Discover what 1.6T optical transceivers are, how they fit AI data centers, and how to choose the right form factor, reach, vendor, and compatibility.
400G LR4 Tech: Long-Reach High-Bandwidth Implementation
April 11, 2026
Explore 400G LR4 technology, architecture, and deployment for 10km high-bandwidth optical links in data centers and AI-driven networks.
QDD-400G-DR4-S Cisco Replacement: Third-Party Tips
March 30, 2026
Explore QDD-400G-DR4-S Cisco replacement tips, including compatibility, performance, and third-party module selection for reliable 400G networks.
QSFP-DD vs QSFP28: Key Differences, Speed, and Use Cases
March 13, 2026
Learn the key differences between QSFP-DD and QSFP28, including speed, port density, compatibility, and deployment scenarios in modern data center networks.
FR4 vs DR4: What Are the Differences in 400G Optics
March 12, 2026
Learn the differences between FR4 and DR4 400G optical modules, including distance, fiber type, connectors, and deployment scenarios in modern data centers.
400G QSFP-DD LR4 Optics: Architecture, Specs and Application
March 11, 2026
Learn how 400G QSFP-DD LR4 transceivers work, including CWDM4 wavelengths, EML lasers, key specifications, and applications in high-speed data center networks.
400G DR4 Transceiver Guide: Specification, Uses and Benefits
March 10, 2026
Learn what a 400G DR4 transceiver is, how it works, its key specifications, applications, and how it compares with other 400G QSFP-DD module.
400GBASE-FR4 Explained: Specs, Architecture, and Uses
March 10, 2026
Learn what 400GBASE-FR4 is, how it works, its CWDM4 wavelength design, specs, transmission distance, and how it compares with other 400G optical standards.
QSFP 400G Explained: Use Cases in Network Infrastructure
January 26, 2026
QSFP 400G demystified: understand its module types, technology, benefits and use cases driving faster and more efficient network infrastructure.
How to Choose QSFP Modules: 40G, 100G & QSFP-DD Guide
December 22, 2025
Learn how to choose QSFP modules for 40G, 100G, QSFP28, QSFP56, and 400G QSFP‑DD networks. Compare speed, distance, fiber type, compatibility, and LINK‑PP products.
400G Products
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NVIDIA/Mellanox QDD-SR4.2-400G Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Juniper QDD-400G-SR4P2 Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Generic QDD-SR4.2-400G Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
FS QDD-SR4.2-400G Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Dell QDD-SR4.2-400G Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Cisco QDD-400G-SR4.2-BD Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Arista QDD-400G-SRBD Compatible LINK-PP 400GBASE-SR4.2 QSFP-DD BiDi 850/910nm 150m MPO-12/UPC MMF Transceiver Module $ 1,210.00 ~ 1,375.00 -
Cisco QDD-400G-LR4-S Compatible 400GBASE-LR4 QSFP-DD 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 738.74 ~ 859.00 -
LINK-PP LQD-CW400-LR4C 400GBASE-LR4 QSFP-DD 1310nm 10km DOM Duplex LC SMF Optical Transceiver Module $ 738.74 ~ 859.00 -
NVIDIA/Mellanox QDD-XDR4-400G Compatible LINK-PP 400GBASE-XDR4 QSFP-DD 8 x 50G PAM4 1310nm 2km MPO-12/APC SMF Transceiver Module $ 755.92 ~ 859.00
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