400G, 800G and 1.6T OSFP Transceivers for Next-Generation AI and Data Center Networks

AI infrastructure is rapidly pushing network speeds beyond traditional 100G and 400G architectures.

Modern GPU clusters, cloud data centers, high-performance computing systems and next-generation Ethernet or InfiniBand fabrics require significantly higher bandwidth between servers, NICs, Leaf switches and Spine switches.

For companies planning new AI infrastructure or upgrading existing high-speed networks, OSFP has become an important optical transceiver form factor for 400G, 800G and emerging 1.6T connectivity.

Taiwan manufacturer Optech Technology Co., Ltd. provides a growing portfolio of high-speed OSFP transceivers covering:

400G OSFP

800G OSFP

and

1.6T OSFP

together with related DAC and AOC connectivity solutions.

Optech products are designed for customers requiring high bandwidth, platform compatibility and flexible deployment across AI, HPC, cloud and data center environments.

Optech OSFP Transceiver Portfolio

The product portfolio shown includes three major generations of OSFP connectivity.

This gives customers a clear migration path from today's 400G infrastructure toward 800G and next-generation 1.6T AI networking.

400G OSFP Transceivers

400G remains widely deployed across current AI, HPC and cloud infrastructure.

Optech provides multiple 400G OSFP optical options to address different transmission distances and fiber architectures.

400G OSFP SR4

400G OSFP SR4 is designed for short-reach optical connectivity.

Typical applications include:

• GPU server connectivity
• NIC-to-Leaf links
• short-distance switch interconnects
• AI data center racks
• HPC clusters

SR4 is particularly relevant where high-density multimode fiber infrastructure is used.

400G OSFP DR4

400G OSFP DR4 provides a single-mode optical option for longer data center connections.

It can be used for:

• Leaf-to-Spine links
• server-to-switch connectivity
• large data halls
• AI fabrics
• cloud infrastructure

DR4 is especially useful when customers require greater reach than short-reach multimode solutions.

400G OSFP DR4+

For projects requiring extended DR4-class connectivity, Optech can also provide 400G OSFP DR4+ solutions.

This can give network designers additional flexibility for larger facilities and project-specific transmission requirements.

800G OSFP Transceivers for AI-Scale Networking

800G is becoming increasingly important in large AI and GPU networks.

As compute density increases, a single switch port needs to move more traffic while maintaining low latency and high port density.

Optech's 800G OSFP portfolio includes:

800G OSFP 2xSR4

800G OSFP 2xDR4

800G OSFP 2xDR4+

800G OSFP 2xFR4

These architectures are particularly useful because one 800G interface can support two 400G-class optical paths in suitable network designs.

800G OSFP 2xSR4

800G OSFP 2xSR4 is designed for short-reach, high-density optical connectivity.

Typical applications include:

• AI Spine-to-Leaf
• Leaf-to-GPU server
• rack-to-rack links
• high-density AI clusters
• short-reach HPC interconnects

It is particularly attractive in environments where two 400G SR4-class paths need to be carried through one 800G OSFP port.

800G OSFP 2xDR4

For single-mode fiber environments, 800G OSFP 2xDR4 provides a practical architecture for medium-reach high-speed connectivity.

It can support applications such as:

• large AI data halls
• Leaf-to-Spine
• 800G-to-2x400G breakout
• GPU scale-out fabrics
• cloud data center networks

This is especially useful when the switch side operates at 800G while server-side NICs operate at 400G.

800G OSFP 2xDR4+

Optech also offers 800G OSFP 2xDR4+ for projects requiring additional optical reach compared with standard DR4-class deployments.

This provides greater flexibility when data center layout or fiber routing requires a longer link budget.

800G OSFP 2xFR4

For longer-reach 800G optical connections, 2xFR4 provides another important option.

Potential applications include:

• longer Spine-to-Leaf links
• large campus data centers
• distributed AI facilities
• data center interconnect within a site
• duplex single-mode fiber environments

For customers trying to reduce fiber count while maintaining very high bandwidth, FR-class architectures can be especially valuable.

1.6T OSFP DR8 for Next-Generation AI Networks

AI networking is already moving beyond 800G.

As switch platforms and SerDes technology move toward 200G-per-lane architectures, 1.6T optical connectivity is becoming increasingly important.

Optech's portfolio includes:

1.6T OSFP DR8

designed for next-generation high-density network environments.

Potential applications include:

• next-generation AI clusters
• GPU scale-out networks
• high-radix switch fabrics
• HPC
• cloud AI infrastructure
• future 1.6T Ethernet or high-speed AI fabrics

For customers planning long-term AI infrastructure, 1.6T provides an upgrade path beyond current 800G deployments.

Why OSFP Is Important for High-Speed AI Networks

OSFP is designed for very high-speed pluggable networking environments.

Its larger mechanical envelope compared with smaller transceiver formats can provide more room for:

• thermal management
• higher-power optical engines
• advanced DSPs
• 800G and 1.6T components

This makes OSFP particularly relevant for high-density AI switches and server-side high-speed adapters.

Tested on Original Networking Devices

Compatibility is one of the most important concerns for companies purchasing third-party optical transceivers.

A module may meet the optical specifications but still encounter problems such as:

• host recognition failure
• EEPROM mismatch
• link-down conditions
• FEC errors
• temperature alarms
• unstable lane operation

For this reason, Optech emphasizes testing on original networking equipment.

According to the supplied product information, Optech's OSFP solutions have been tested with major networking platforms including NVIDIA and Cisco environments.

This helps reduce the risk associated with deploying third-party optics in production networks.

NVIDIA-Compatible OSFP Solutions

NVIDIA networking platforms are widely used in modern AI and HPC infrastructure.

These environments can require high-speed OSFP connectivity for:

• GPU server networks
• InfiniBand fabrics
• Ethernet AI fabrics
• Spine-Leaf architectures
• ConnectX NIC connectivity
• BlueField DPU environments
• high-density switch links

Optech can provide OSFP products configured for target NVIDIA environments and support project qualification according to the customer's switch or NIC.

Cisco-Compatible High-Speed Optical Solutions

Cisco is another major networking platform used across enterprise, cloud and data center infrastructure.

Optech can also support optical transceiver projects targeting compatible Cisco high-speed platforms.

For customers evaluating a deployment, Optech recommends providing:

• Cisco switch model
• line card or port type
• firmware version
• required speed
• optical distance
• quantity

so the correct module configuration can be evaluated before volume deployment.

Compatibility Matters More at 800G and 1.6T

At lower network speeds, interoperability can sometimes be relatively straightforward.

At 800G and 1.6T, however, host-module interaction becomes more complex.

Important areas can include:

• CMIS management
• firmware
• EEPROM coding
• lane configuration
• FEC
• module power class
• thermal behavior
• host equalization
• alarms and diagnostics

This makes platform testing especially valuable for next-generation optical modules.

Optech Compatibility Testing

For project-based orders, Optech can work with customers on qualification against the intended networking environment.

Testing may include:

Module Recognition

Confirming the host correctly recognizes the module.

Link-Up Testing

Verifying that the port establishes a stable high-speed link.

Optical Power Testing

Checking TX and RX performance against the relevant specifications.

FEC Monitoring

Evaluating error correction behavior and link stability.

Digital Diagnostics

Reviewing temperature, voltage, optical power and alarm information.

Long-Term Link Testing

Evaluating stability over extended operating periods where required.

OSFP for Spine-Leaf AI Fabrics

One of the most important applications for 800G and 1.6T OSFP is the Spine-Leaf network.

A simplified AI network may look like:

GPU Servers / NICs

↓

Leaf Switches

↓

Spine Switches

800G or 1.6T OSFP modules can provide the high-capacity backbone between switches, while breakout optics may connect high-speed Leaf ports to multiple server-side interfaces.

800G-to-400G Breakout Connectivity

One major advantage of the 2xSR4, 2xDR4 and 2xFR4 architectures is support for network designs where:

1 × 800G

needs to connect toward:

2 × 400G

This is useful when the switch uses 800G ports but the server or NIC side still operates at 400G.

It can help improve:

• switch port utilization
• port density
• server compatibility
• migration flexibility
• infrastructure investment protection

DAC and AOC Are Also Available

Not every high-speed link requires separate optical transceivers.

Optech also provides DAC and AOC solutions for high-speed networking.

DAC

Direct Attach Copper is especially suitable for very short links.

Advantages include:

• low power
• low latency
• lower cost
• simple installation

Typical applications include same-rack server-to-switch connectivity.

AOC

Active Optical Cable can support longer integrated links while providing lighter cabling than high-speed copper.

It is useful for:

• rack-to-rack links
• AI server connections
• high-density data centers
• HPC systems

This allows customers to source multiple high-speed connectivity technologies from Optech.

Choosing the Right OSFP Solution

A customer should not select an optical transceiver only by data rate.

The correct product also depends on:

• transmission distance
• multimode or single-mode fiber
• connector type
• switch model
• NIC model
• firmware
• airflow
• thermal requirements
• breakout requirement
• cable infrastructure

For example:

Who Needs Optech OSFP Transceivers?

The OSFP portfolio is particularly relevant to companies involved in:

• AI infrastructure
• GPU cloud
• hyperscale data centers
• HPC
• switch manufacturing
• server manufacturing
• network system integration
• telecom
• cloud services
• optical transceiver distribution
• enterprise data centers
• research computing

What Optical Module Buyers Should Evaluate

For companies purchasing large quantities of 400G, 800G or 1.6T modules, several factors matter beyond price.

Platform Compatibility

The module must work correctly with the actual switch or NIC.

Optical Performance

TX, RX and link-budget performance must remain within specification.

BER and FEC

Stable error performance is particularly important in AI networks.

Thermal Stability

High-speed modules generate significant heat and need to function correctly within the host thermal design.

Supply Capacity

Large AI projects may require thousands of optical transceivers.

Traceability

Serial-number tracking can be important for deployment and RMA management.

Technical Support

A supplier should be able to help investigate actual switch and NIC compatibility issues.

Optech Customization Capability

Different projects may require different product configurations.

Optech can work with customers on areas such as:

• EEPROM coding
• compatibility configuration
• custom labels
• customer P/N
• serial-number formats
• QR codes
• barcodes
• packaging
• cable lengths
• breakout architecture

This is especially useful for system integrators, distributors and customers with large project requirements.

From Engineering Samples to Volume Orders

For high-speed optics, Optech recommends starting with sample qualification.

A typical project flow can be:

Requirement Review → Product Selection → Sample Testing → Switch/NIC Compatibility Verification → Customer Qualification → Production Planning → Volume Delivery

This gives customers an opportunity to evaluate the actual product on their network before large-scale deployment.

What Information Should Buyers Provide?

For faster evaluation, customers should ideally provide:

• required speed: 400G / 800G / 1.6T
• optical type: SR4 / DR4 / FR4 / DR8
• switch manufacturer
• switch model
• NIC model if applicable
• firmware version
• link distance
• fiber type
• required quantity
• sample quantity
• project timeline

This helps Optech recommend an appropriate product configuration.

Why Choose Optech OSFP Transceivers?

For companies looking for a high-speed optical module supplier, Optech offers several practical advantages.

Three Generations of High-Speed Connectivity

400G, 800G and 1.6T.

Multiple Optical Architectures

SR4, DR4, DR4+, 2xSR4, 2xDR4, 2xDR4+, 2xFR4 and DR8.

Platform Compatibility Support

Solutions can be evaluated on original networking devices.

NVIDIA and Cisco Platform Experience

Relevant OSFP products have been tested for targeted high-speed networking environments as stated in the supplied product materials.

DAC / AOC Availability

Customers can source both pluggable optics and high-speed cable solutions.

Taiwan Manufacturer

Optech provides Taiwan-based manufacturing, engineering and global customer support.

Samples and Volume Production

From engineering qualification through larger deployment.

Upgrade Your AI Network with Optech OSFP Transceivers

As AI networks move from 400G to 800G and toward 1.6T, optical connectivity is becoming a critical part of overall infrastructure performance.

Optech provides a high-speed OSFP portfolio covering:

400G OSFP — SR4 / DR4 / DR4+

800G OSFP — 2xSR4 / 2xDR4 / 2xDR4+ / 2xFR4

1.6T OSFP — DR8

together with:

DAC / AOC connectivity

and platform-oriented compatibility support.

For companies deploying AI clusters, HPC systems, cloud infrastructure or next-generation data centers, Optech can support the project from sample qualification through volume production.

Contact Optech for OSFP samples, NVIDIA/Cisco platform compatibility evaluation, pricing, customization and volume orders.

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FAQ

1. What OSFP speeds does Optech provide?

According to the supplied product portfolio, Optech provides 400G, 800G and 1.6T OSFP optical transceiver solutions.

2. Which 400G OSFP products are available?

The portfolio shown includes:

400G OSFP SR4, DR4 and DR4+.

3. Which 800G OSFP optical types are available?

The supplied material shows:

800G OSFP 2xSR4, 2xDR4, 2xDR4+ and 2xFR4.

4. Does Optech provide 1.6T OSFP?

Yes. The portfolio shown includes a 1.6T OSFP DR8 solution.

5. Are Optech OSFP products compatible with NVIDIA platforms?

The supplied marketing information states that Optech OSFP products are NVIDIA compatible and tested on original devices. For a production project, the exact switch or NIC model and firmware should still be confirmed during qualification.

6. Are the products tested with Cisco switches?

According to the supplied information, relevant Optech products have also been tested with Cisco switching platforms. Customers should provide the exact Cisco model and software version for project-specific verification.

7. Why is original-device testing important?

It helps verify module recognition, link-up behavior, diagnostics, FEC, optical performance and long-term stability on the actual target host.

8. What is the difference between 800G 2xSR4 and 2xDR4?

2xSR4 is intended for shorter optical links, while 2xDR4 uses single-mode optical architecture for longer data center connections.

9. What is 800G 2xFR4 used for?

2xFR4 is useful for longer-reach 800G connections and can provide two FR4-class optical paths from one high-density OSFP interface.

10. Can an 800G OSFP module be used for 2x400G breakout?

Suitable 2xSR4, 2xDR4 and 2xFR4 architectures can support 800G-to-2x400G applications when the host platform and network configuration support breakout.

11. Does Optech also offer DAC and AOC?

Yes. The supplied product information states that DAC and AOC are available alongside the OSFP transceiver portfolio.

12. Can customers request samples before ordering in volume?

Yes. Sample qualification is recommended for high-speed optics so the product can be verified on the customer's switch or NIC before volume deployment.

13. Can Optech customize the modules?

Optech can work with customers on compatibility coding, labels, serial numbers, packaging and other project-specific requirements.

Conclusion

The rapid evolution of AI networking is driving optical connectivity from 400G to 800G and now toward 1.6T.

For companies investing in next-generation GPU clusters, cloud data centers and high-performance network fabrics, selecting the right OSFP transceiver supplier is becoming increasingly important.

Optech's portfolio covers:

400G OSFP SR4 / DR4 / DR4+

800G OSFP 2xSR4 / 2xDR4 / 2xDR4+ / 2xFR4

and

1.6T OSFP DR8

with DAC / AOC availability, original-device testing and compatibility support for targeted NVIDIA and Cisco environments.

For buyers who need reliable high-speed optical modules, project qualification and volume supply, Optech welcomes sample requests, compatibility evaluations, customized projects and worldwide orders.