1.6T OSFP — 1.6T optical module product photo — 1.6T

1.6T OSFP Optical Transceiver (8×200G PAM4)

1.6T OSFP doubles the per-lane rate to 224 Gb/s, so eight lanes carry 1.6 Tb/s in a single cage. It exists for one reason: AI scale-out fabrics, where InfiniBand XDR runs at 800G per port and switches expose twin-port cages. Power is the real constraint — 25–26 W per module means the switch thermal design, not the optics catalogue, decides what you can deploy.

8 × 224 Gb/s PAM4 electrical lanes per OSFP224 / OSFP-XD architecture
Compliant with IEEE 802.3dj and OIF CEI-224G electrical interfaces
CMIS 5.2 management, RS(544,514) FEC on optical lanes
2×FR4/2×LR4: dual duplex LC, 1271–1331 nm CWDM grid over SMF
Max power dissipation ≤ 26 W, single +3.3 V supply

InfiniBand XDR 800G per-port fabrics (Quantum-X800 class)
1.6T Ethernet switch-to-switch links
AI cluster GPU-to-leaf interconnect
Next-generation 224G serdes switch platforms

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Full Specifications

OSFP 1.6T modules

OSFP 1.6T modules
P/N	Product Description	Data Rate	Reach	Wavelength	Interface	Power (W)	Temp. (°C)
BLO1600-DR8	OSFP 1.6T DR8 (8×200G)	1.6T	500 m	1310 nm	2× MPO-12 APC	≤ 25	0–70
BLO1600-2FR4	OSFP 1.6T 2×FR4	1.6T	2 km	1271–1331 nm	2× duplex LC	≤ 26	0–70
BLO1600-2LR4	OSFP 1.6T 2×LR4	1.6T	10 km	1271–1331 nm	2× duplex LC	≤ 26	0–70

All parameters are typical values at 25 °C unless otherwise stated. Datasheets and test reports available on request.

Trade Terms & Ordering Notes

MOQ	20 pcs per part number; 1-2 pcs evaluation samples
Trade terms	EXW, FOB, CIF. Custom trade terms upon request.
Payment	T/T 30% deposit, balance before shipment
Lead time	Samples 3-5 working days · Bulk 2-4 weeks
Warranty	3 years; RMA replacement for defective units
Packaging	ESD bag + individual box, 50 pcs per carton. Custom packaging solutions are acceptable as requested.
Shipping	DHL / FedEx / UPS / air or sea freight
OEM / ODM	Custom label and coding, MOQ 100 pcs.

Frequently asked questions

What is OSFP224 and how is it different from OSFP?

OSFP224 is the variant specified for 224 Gb/s per-lane signalling with a revised connector and paddle card for the higher lane rate. Standard 1.6T modules conform to it; a plain 400G/800G OSFP port will not run them.

Why does 1.6T matter for AI clusters specifically?

Because scale-out bandwidth per GPU has to keep pace with compute. XDR fabrics run 800G per port and use twin-port cages, so a single 1.6T twin-port module can serve two 800G endpoints — halving the module count and the cable count in a spine layer.

What is the power budget for 1.6T optics?

Plan for 25–26 W per module on 2×FR4/2×LR4 codes. Compared with 800G at 12–16 W, that changes rack power distribution and cooling requirements. Some vendors quote under 25 W with LPO or linear-drive designs, but passive cooling headroom still has to be designed in.

Which FEC and lane rate does 1.6T use?

224 Gb/s PAM4 per lane with RS(544,514) FEC, per IEEE 802.3dj and OIF CEI-224G electrical interfaces. CMIS 5.2 is the management baseline, and both ends must run matching FEC and modulation profiles.

Can 1.6T modules be deployed on today's 800G switches?

Only if the switch supports 1.6T per-cage operation — generally the newest generation with 224G serdes. Most current 800G platforms run 800G per cage and cannot take a 1.6T module. Check the switch's port-rate capability before designing the bill of materials.

What fibre type should I standardise on for 1.6T?

Single-mode with high-grade MPO-12 APC for 2×DR4 links up to 500 m, and duplex LC single-mode for 2×FR4/2×LR4. Because per-lane rate is 224G, connector cleanliness and polish quality matter more than at lower rates — specify APC and inspect every end.