1.6T OSFP-XD DR8 Optical Transceiver
Product Overview
The Apex 1.6T OSFP-XD DR8 module carries eight 200 Gigabit PAM4 lanes over eight single mode fiber pairs, giving 1.6T on one port at 500m. It is the module that makes a 1.6T switch port usable without breaking it down into two or four smaller ports.
The pressure behind 1.6T is switch radix and front panel space. Once a switch ASIC reaches 51.2T, the way to use it is a smaller number of faster ports: 32 ports of 1.6T instead of 64 of 800G. Doubling the lane rate to 200G per lane is what allows that, and it changes the optics, the host interface and the thermal design of the module at the same time.
OSFP-XD is a deliberate mechanical departure from the 800G OSFP form factor: a longer body, a different connector and higher lane count, which is why it is a new design rather than a firmware upgrade. It is best treated as the next generation of the spine and AI fabric port, while 800G OSFP and QSFP-DD remain the volumes we ship and hold in stock. Tell us the switch platform, the port plan and the cable schedule and we confirm the module, the coding and the fiber type.
Key Features
- 1.6T aggregated line rate as 8 x 200Gbps PAM4 lanes
- OSFP-XD form factor with the higher lane count connector
- 500m reach over single mode fiber, DR8 parallel optics
- 8 duplex LC or MPO based fiber plant depending on the platform
- Designed for 51.2T class switch ASICs and AI training fabrics
- Digital Diagnostic Monitoring (DDM/DOM) per lane
- Coded for the host platform you name before shipment
- RoHS compliant, tested for optical power and error rate before shipment
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-OSFP-XD-1.6T-500M-DR8 |
| Manufacturer | Apex |
| Data Rate | 1.6Tbps (8 x 200Gbps PAM4) |
| Form Factor | OSFP-XD, hot pluggable |
| Standard | 1.6T DR8 parallel single mode |
| Wavelength | 1310nm band, 8 lanes |
| Maximum Reach | 500m over SMF |
| Fiber Type | Single Mode Fiber (SMF) |
| Connector Type | MPO/MTP, 16 fiber, platform dependent |
| Modulation | PAM4, 200Gbps per lane |
| DDM / DOM | Supported, per lane |
| Compliance | OSFP-XD MSA, RoHS |
| Temperature | 0 to 70C commercial |
Ordering Options
Family options are listed below as plain text so they can be copied into an RFQ or a spreadsheet.
| Form factor | Rate | Lanes | Reach |
|---|
| OSFP-XD | 1.6T | 8 x 200G | 500m SMF |
| OSFP | 800G | 8 x 100G | 500m SMF, 2km SMF |
| OSFP | 800G | 8 x 100G | 50m to 100m MMF |
| QSFP-DD | 800G | 8 x 100G | 500m SMF, 2km SMF |
| QSFP-DD | 400G | 8 x 50G | 500m, 2km, 10km SMF |
| QSFP112 | 400G | 4 x 100G | 500m, 2km, 10km SMF |
Applications
AI Training Fabric Spine
Gives the spine layer 1.6T ports so a 51.2T switch can be cabled with half the port count of an 800G design.
High Radix Leaf Uplinks
Carries the leaf to spine uplink at 1.6T where rack density or cable volume makes 800G uplinks impractical.
Next Generation DCI Ports
Provides the 1.6T building block for metro data centre interconnect once 1.6T router and transport ports are in service.
Compatibility
1.6T OSFP-XD modules are coded to the switch platform you name and tested on live ports before shipment. Because the form factor and the lane rate are both new, the practical checks are the host platform support, the front panel space, the fiber count available per port and the thermal budget at the port. 800G OSFP and QSFP-DD modules, MPO trunks and breakout assemblies remain available from the same line for the volumes that are shipping today.
Related Products
Frequently Asked Questions
Is 1.6T OSFP-XD the same as 800G OSFP?
No. The lane rate doubles from 100G to 200G per lane and the module uses the longer OSFP-XD body with a different connector, so it needs a platform that supports it. It is a new port design, not a firmware upgrade of an 800G port.
What reach does the 1.6T DR8 module cover?
500m over single mode fiber, which suits spine and fabric runs inside a large campus or a multi building AI cluster. Longer coherent reaches at 1.6T are covered by separate DCO products.
Do I have to move to 1.6T to use a 51.2T switch?
No. 800G ports are still the volume option and can be used with breakout or with fewer, faster ports depending on the platform. 1.6T is the way to use the full switch capacity with the lowest port count.
How should I plan fiber for 1.6T ports?
A 1.6T DR8 port needs sixteen single mode strands at the module, so cable schedules built around 800G MPO trunks need to be recalculated. Send us the port count and we return a fiber and trunk plan.
Why Choose Apex
- Optical engineering support and supply from 1.25G to 1.6T, including OSFP, OSFP-XD and QSFP-DD lines.
- Port, fiber and thermal budget checked with your cable schedule before the order is released.
- Every module is tested for optical power and error rate before shipment.
- Backed by a 3 year warranty and technical support before and after the sale.
