Specifications

Number	QSFP28-100G-BX20	Vendor Name	FB-LINK
Form Factor	QSFP28	Max Data Rate	100Gbps
Wavelength	1270nm/1330nm	Max Cable Distance	20km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Recever Type	PIN
Tx Power	-4.3~4.5dBm	Minimum Receiver Power	-14.5dBm
Max Powerbudget	13dB	Receiver Overload	4.5dBm
Power Consumption	≤5W	Extinction Ratio	＞4dB

 

100G Connectivity for Data Center
Featured with 5W low-power, high-density and high-speed, the QSFP28 transceiver offers a popular way to help you quickly ramp up to 100G transmission.

 

 

Quality Certifications

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Understanding 100G QSFP28 BiDi Optical Transceivers: The Future of High-Speed Networking

As data centers and telecommunications networks continue to evolve, the demand for faster, more efficient connectivity solutions has never been greater. Optical transceivers have become the backbone of modern network infrastructure, enabling seamless data transmission across vast distances while maintaining exceptional performance standards.

What Makes BiDi Technology Stand Out

Bidirectional (BiDi) optical transceivers represent a significant advancement in fiber optic communication. Unlike traditional transceivers that require dual fibers for transmission and reception, BiDi technology accomplishes both functions over a single fiber strand. This innovative approach utilizes different wavelengths for sending and receiving data, dramatically reducing fiber infrastructure costs while maintaining robust performance.

The FB-LINK QSFP28 BiDi solution exemplifies this technology, operating on wavelengths of 1270nm for transmission and 1330nm for reception. This wavelength separation ensures that signals don't interfere with each other, maintaining signal integrity throughout the transmission path.

Performance Characteristics That Matter

When evaluating optical transceivers for enterprise or service provider networks, several critical parameters determine overall system reliability. Power budget considerations are paramount-the difference between transmitted optical power and minimum receiver sensitivity defines the link margin available for system degradation over time.

Modern 100G optical transceivers typically feature DFB (Distributed Feedback) laser transmitters paired with PIN photodiode receivers. This combination delivers exceptional performance across extended distances, with some configurations supporting links up to 20 kilometers over single-mode fiber. The simplex LC connector interface provides reliable physical connectivity while minimizing insertion loss.

Energy Efficiency in Modern Networks

Power consumption has become a critical consideration as networks scale. Advanced optical transceivers are engineered to deliver maximum throughput while minimizing energy requirements. Solutions maintaining power consumption at or below 5 watts per module enable significant energy savings in large-scale deployments where hundreds or thousands of transceivers operate simultaneously.

The extinction ratio-a measure of signal quality representing the ratio between optical power levels for binary ones and zeros-directly impacts transmission quality. Higher extinction ratios, typically exceeding 4dB, ensure cleaner signal transmission and better bit error rates.

Deployment Considerations for Network Engineers

Successful implementation of optical transceivers requires understanding receiver characteristics. The overload parameter, indicating the maximum optical power a receiver can handle without performance degradation, is crucial for preventing receiver saturation. Additionally, the minimum receiver power specification defines the weakest signal the receiver can reliably detect, establishing the lower boundary of operational range.

These parameters work together to define the operational window within which optical transceivers function optimally. Network designers must account for fiber attenuation, connector losses, and aging factors when planning deployments to ensure long-term reliability.

Applications Across Industries

High-speed optical transceivers serve diverse applications across multiple sectors. Data center interconnects rely on these components to enable east-west traffic flow between server racks and north-south connectivity to core switching infrastructure. Telecommunications providers utilize them for metro and long-haul networks, while enterprises deploy them for campus backbone connections.

The 100G data rate provides sufficient bandwidth for demanding applications including:

Cloud service provider infrastructure

5G fronthaul and backhaul networks

Financial trading platforms requiring low latency

Video production and broadcasting facilities

Research and educational institutions

Healthcare systems managing large imaging datasets

Frequently Asked Questions

What is the primary advantage of BiDi optical transceivers over traditional designs?

BiDi optical transceivers utilize a single fiber for both transmission and reception by employing different wavelengths in each direction. This approach cuts fiber infrastructure costs in half, reduces cable management complexity, and maximizes existing fiber plant utilization without sacrificing performance.

How do I calculate if an optical transceiver will work for my specific link distance?

Calculate your link budget by subtracting the total system loss from the transmitter output power. System loss includes fiber attenuation (typically 0.3-0.5 dB/km for single-mode fiber), connector losses (usually 0.3-0.5 dB each), and splice losses. The result must be greater than your receiver's minimum sensitivity with adequate margin for aging and repair splices.

What's the difference between QSFP28 and other optical transceiver form factors?

QSFP28 (Quad Small Form-factor Pluggable 28) is designed specifically for 100G applications, offering four 25G channels that can be aggregated. Compared to SFP+ or SFP28, it provides higher port density and greater bandwidth. The form factor has become the industry standard for 100G connectivity in modern networking equipment.

Can BiDi transceivers work with existing fiber infrastructure?

Yes, BiDi optical transceivers are specifically designed to work with standard single-mode fiber infrastructure. They're particularly valuable for fiber-constrained environments where fiber strand availability is limited. However, ensure your fiber type matches the transceiver specifications-single-mode fiber is required for long-distance applications.

What maintenance considerations exist for optical transceivers?

Regular cleaning of optical connectors is essential to maintain performance. Contamination is the leading cause of optical link failures. Monitor optical power levels periodically to detect degradation trends. Most modern switches provide diagnostic monitoring for temperature, voltage, and optical power levels through digital diagnostic monitoring (DDM) interfaces.

How does temperature affect optical transceiver performance?

Optical transceivers are rated for specific operating temperature ranges, typically 0°C to 70°C for commercial-grade units. Temperature extremes can affect laser wavelength stability and optical power output. Ensure adequate cooling in high-density deployments where multiple transceivers generate heat in confined spaces.

Selecting the Right Solution for Your Network

When specifying optical transceivers for network projects, match transceiver capabilities to application requirements. Consider not only current bandwidth needs but future growth projections. The investment in 100G infrastructure provides substantial headroom for traffic growth while maintaining compatibility with evolving network architectures.

Vendor selection matters significantly. Reputable manufacturers provide comprehensive testing, quality assurance, and compatibility validation across multiple switch platforms. Look for products with robust technical documentation, clear warranty terms, and responsive technical support.

The Path Forward

As networks continue their evolution toward 400G and beyond, today's 100G optical transceivers serve as a proven, cost-effective solution for high-performance connectivity. Understanding the technical parameters, deployment considerations, and application requirements enables network professionals to design robust, scalable infrastructures that meet both current demands and future expansion needs.

The combination of advanced BiDi technology, efficient power management, and reliable performance characteristics makes modern optical transceivers an essential component in the digital infrastructure powering our connected world.

 

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