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800G OSFP InfiniBand NDR

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800G OSFP InfiniBand NDR Overview

The 800G OSFP InfiniBand NDR category contains four optical transceiver modules designed for 800Gb/s links in InfiniBand NDR networks using NVIDIA Mellanox Quantum™-2 NDR InfiniBand switches. All models use the OSFP form factor with a finned-top structure, PAM4 modulation, dual optical interfaces, and DOM. The series includes one multimode transceiver and three single-mode transceivers, supporting transmission distances from 50m to 2km. Depending on the optical specification and transmission architecture, the modules use either dual MTP/MPO-12 APC connectors or dual duplex LC/UPC connectors.

OSFP-NDR-2SR4 supports 800GBASE 2xSR4/SR8 parallel transmission over multimode fiber. It uses eight 100Gb/s PAM4 optical channels arranged as two 400Gb/s SR4 interfaces, providing a total rate of 800Gb/s. Operating at 850nm, the module has two MTP/MPO-12 APC connectors, each carrying four optical channels and 400Gb/s. It supports distances up to 50m and includes DOM in a finned-top OSFP package for NVIDIA Mellanox Quantum™-2 NDR InfiniBand switch links.

OSFP-NDR-2DRL4 provides 800GBASE 2xDRL4/DRL8 parallel transmission over single-mode fiber. Eight 100Gb/s PAM4 optical channels form two 400Gb/s DRL4 interfaces for an aggregate rate of 800Gb/s. The module operates at 1310nm and uses dual MTP/MPO-12 APC connectors, with each connector carrying four channels and 400Gb/s. It supports transmission distances up to 100m and integrates DOM within a finned-top OSFP enclosure for NVIDIA Mellanox Quantum™-2 NDR InfiniBand networks.

OSFP-NDR-2DR4 supports 800GBASE 2xDR4/DR8 parallel optical transmission over single-mode fiber. It contains eight 100Gb/s PAM4 optical channels divided into two 400Gb/s DR4 interfaces, delivering 800Gb/s total capacity. Operating at 1310nm, the transceiver uses two MTP/MPO-12 APC connectors, each carrying four optical channels and 400Gb/s. It reaches up to 500m and includes DOM in a finned-top OSFP package for NVIDIA Mellanox Quantum™-2 NDR InfiniBand switch connections.

OSFP-NDR-2FR4 supports 800GBASE 2xFR4/FR8 transmission over single-mode fiber using wavelength-division multiplexing. It provides two 400Gb/s FR4 interfaces, each combining four 100Gb/s PAM4 optical channels for a total rate of 800Gb/s. Operating around 1310nm, the module uses two duplex LC/UPC connectors, with each connector carrying one 400Gb/s interface. It supports distances up to 2km and includes DOM in a finned-top OSFP housing for NVIDIA Mellanox Quantum™-2 NDR InfiniBand links.

How does the 800G OSFP InfiniBand NDR category deliver 800Gb/s through a twin-port OSFP interface?

It uses eight 100Gb/s PAM4 channels arranged as two 400Gb/s optical interfaces. Each module provides 800Gb/s aggregate capacity through two optical connectors, with each connector carrying one 400Gb/s path.

What is the main optical difference between OSFP-NDR-2SR4 and OSFP-NDR-2DRL4 for short-reach NVIDIA Mellanox Quantum-2 NDR links?

OSFP-NDR-2SR4 uses 850nm multimode fiber for up to 50m, while OSFP-NDR-2DRL4 uses 1310nm single-mode fiber for up to 100m. Both models use dual MTP/MPO-12 APC connectors and two 400Gb/s parallel optical interfaces.

How do OSFP-NDR-2DRL4 and OSFP-NDR-2DR4 differ when both use 1310nm single-mode parallel optics?

The transmission reach differs. OSFP-NDR-2DRL4 supports up to 100m, while OSFP-NDR-2DR4 supports up to 500m. Both models use dual MTP/MPO-12 APC connectors and eight 100Gb/s PAM4 optical channels.

Why does OSFP-NDR-2FR4 use dual duplex LC/UPC connectors instead of the dual MTP/MPO-12 APC connectors used by OSFP-NDR-2DR4?

OSFP-NDR-2FR4 uses wavelength-division multiplexing to combine four 100Gb/s optical channels into each 400Gb/s duplex LC interface. OSFP-NDR-2DR4 carries four separate parallel optical channels through each MTP/MPO-12 APC connector.

Which model in the 800G OSFP InfiniBand NDR category supports the longest single-mode transmission distance?

OSFP-NDR-2FR4. It supports up to 2km over single-mode fiber, compared with 500m for OSFP-NDR-2DR4 and 100m for OSFP-NDR-2DRL4.

Can OSFP-NDR-2SR4, OSFP-NDR-2DRL4, OSFP-NDR-2DR4, and OSFP-NDR-2FR4 be used with NVIDIA Mellanox Quantum-2 NDR InfiniBand switches?

Yes. All four models are designed for 800Gb/s twin-port OSFP links in NVIDIA Mellanox Quantum-2 NDR InfiniBand networks. Their finned-top OSFP housings are intended for switch-side installations requiring this module structure.

Which fiber connections are required for each model in the 800G OSFP InfiniBand NDR category?

Two optical links are required per module. OSFP-NDR-2SR4 uses dual MTP/MPO-12 APC multimode links; OSFP-NDR-2DRL4 and OSFP-NDR-2DR4 use dual MTP/MPO-12 APC single-mode links; OSFP-NDR-2FR4 uses two duplex LC/UPC single-mode links.

Does the 800G OSFP InfiniBand NDR category provide digital optical monitoring on all four models?

Yes. OSFP-NDR-2SR4, OSFP-NDR-2DRL4, OSFP-NDR-2DR4, and OSFP-NDR-2FR4 all include DOM, regardless of whether they use multimode or single-mode fiber and MTP/MPO or duplex LC connectors.

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