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800G OSFP

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800G OSFP Overview

The 800G OSFP category contains three 800G optical transceiver modules for data centers, high-performance computing networks, and enterprise core and aggregation applications. All models use the OSFP form factor with a finned-top thermal structure, PAM4 modulation, and DOM support. The series includes one multimode transceiver and two single-mode transceivers, covering transmission distances from 50m to 2km. Depending on the optical specification, the modules use either dual MTP/MPO-12 APC connectors for 2xSR4 or 2xDR4 links or dual duplex LC/UPC connectors for 2xFR4 transmission.

OSFP-800G-2SR4 This 800GBASE 2xSR4/SR8 OSFP transceiver operates at 850nm over multimode fiber. It uses two MTP/MPO-12 APC connectors, with each connector supporting one SR4 optical path to form the combined SR8 interface. The module supports transmission distances up to 50m and incorporates PAM4 modulation, DOM monitoring, and a finned-top housing. It is designed for short-reach links in data centers, high-performance computing networks, and enterprise core and aggregation environments.

OSFP-800G-2DR4 This 800GBASE 2xDR4/DR8 OSFP transceiver provides 1310nm transmission over single-mode fiber. Its two MTP/MPO-12 APC connectors each carry one DR4 optical path, creating the combined DR8 interface. The module supports links up to 500m and features PAM4 modulation, DOM monitoring, and a finned-top thermal design. It supports medium-reach optical interconnections in data centers, high-performance computing networks, and enterprise core and aggregation applications.

OSFP-800G-2FR4 This 800GBASE 2xFR4/FR8 OSFP transceiver operates at 1310nm over single-mode fiber and uses two duplex LC/UPC connectors. Each connector supports one FR4 optical path, together forming the FR8 interface. The module reaches transmission distances up to 2km and integrates PAM4 modulation, DOM monitoring, and a finned-top housing. It is intended for longer-reach connections across data centers, high-performance computing networks, and enterprise core and aggregation environments.

FAQ

What are the key optical differences among OSFP-800G-2SR4, OSFP-800G-2DR4, and OSFP-800G-2FR4?

OSFP-800G-2SR4 uses 850nm multimode fiber for links up to 50m. OSFP-800G-2DR4 uses 1310nm single-mode fiber for up to 500m, while OSFP-800G-2FR4 uses 1310nm single-mode fiber and reaches up to 2km.

Can OSFP-800G-2SR4 provide two separate 400G SR4 optical paths from one 800G OSFP port?

Yes. Its two MTP/MPO-12 APC connectors each carry one four-channel 400G SR4 optical path. Together, the two paths form the module’s 800G 2xSR4/SR8 interface over multimode fiber, supporting distances up to 50m.

What fiber and connector configuration does OSFP-800G-2DR4 require for a 500m link?

It requires single-mode fiber with two MTP/MPO-12 APC connections. Each connector carries one four-channel 400G DR4 optical path at 1310nm, and the two paths combine as an 800G 2xDR4/DR8 interface with a maximum reach of 500m.

Why does OSFP-800G-2FR4 use dual duplex LC/UPC connectors instead of MTP/MPO-12 APC connectors?

The OSFP-800G-2FR4 uses two independent 400G FR4 optical paths over single-mode fiber. Each duplex LC/UPC connection carries one FR4 path, and the two paths together form the 800G 2xFR4/FR8 interface for distances up to 2km.

Can OSFP-800G-2SR4 and OSFP-800G-2DR4 operate over the same installed fiber cabling?

No. OSFP-800G-2SR4 requires 850nm multimode fiber and supports up to 50m, whereas OSFP-800G-2DR4 requires 1310nm single-mode fiber and supports up to 500m. Although both use dual MTP/MPO-12 APC connectors, their fiber types are different.

Which model in the 800G OSFP category supports the longest optical transmission distance?

OSFP-800G-2FR4 supports the longest distance at up to 2km. It operates at 1310nm over single-mode fiber and uses two duplex LC/UPC connectors, compared with the 500m OSFP-800G-2DR4 and 50m OSFP-800G-2SR4.

Do OSFP-800G-2SR4, OSFP-800G-2DR4, and OSFP-800G-2FR4 all include DOM support?

Yes. All three listed models include DOM support. The host system can access the module’s available digital diagnostic information for operational monitoring, provided the installed switch or platform supports reading DOM data.

What host cooling configuration is appropriate for the finned-top modules in the 800G OSFP category?

A host platform with finned-top-compatible, air-cooled OSFP cages is appropriate. The exposed integrated heat-sink fins are designed to dissipate module heat directly into the system airflow, so the cage and thermal structure must match the finned-top OSFP design.

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