Guatemala Solution Single-fiber bidirectional QSFP28

Single-fiber bidirectional QSFP28 modules enable 100G high-speed data transmission over a single optical fiber, effectively doubling fiber capacity and reducing deployment costs.Overview

Single-fiber bidirectional (BIDI) QSFP28 transceivers allow simultaneous transmit and receive operations on a single fiber strand using Wavelength Division Multiplexing (WDM) technology. This approach eliminates the need for separate fibers for upstream and downstream traffic, which is particularly valuable in regions with limited fiber infrastructure, such as remote areas in Guatemala .

Key Features

• High-Speed Transmission: Supports 100Gb/s Ethernet over a single fiber, using PAM4 or NRZ modulation to efficiently encode data .
• Extended Reach: Depending on the module, transmission distances range from 100 meters in data centers to up to 80 km for long-haul or metro networks .
• Fiber Efficiency: Halves fiber usage, reducing cabling costs and simplifying network upgrades .
• Compact Form Factor: QSFP28 modules fit into high-density switch ports, maximizing rack space .
• Broad Compatibility: Interoperable with mainstream switches and routers, supporting both standard and industrial temperature ranges .

Technical Approaches

• Dual-Laser Coherent Optics: Coherent QSFP28 modules integrate two independently tunable lasers for transmit and local oscillator functions, enabling IP-over-DWDM transmission and enhancing capacity up to 10x on existing 10G networks .
• 4x25G NRZ or PAM4: Some modules, like Walsun's 100G ZR4 BIDI, use four 25G NRZ channels or PAM4 modulation to achieve single-fiber bidirectional transmission with high signal quality and low power consumption (