Supplier Single Fiber Bidirectional 100G

Key manufacturers of 100G single-fiber bidirectional optical modules include Svelol, ProLabs, and NEC, offering QSFP28 BiDi transceivers that enable 100Gbps over a single fiber using WDM technology.Overview

A 100G single-fiber BiDi optical module uses wavelength division multiplexing (WDM) to transmit and receive 100Gbps data over a single optical fiber. Unlike traditional dual-fiber modules, it sends signals on different wavelengths (e.g., TX 1330nm / RX 1270nm) through the same fiber, effectively doubling fiber utilization and reducing cabling costs by 50% . These modules are compatible with standard LC/SC interfaces and can integrate seamlessly into existing network infrastructure.

Key Manufacturers and Products

• Svelol: Offers 100G QSFP28 BiDi modules with PAM4 modulation, supporting distances from 100 meters up to 80 km. These modules are designed for high-density data centers and telecom networks, providing broad compatibility with mainstream switch brands .
• ProLabs: Provides QSFP28 BiDi transceivers with reach options up to 70 km, supporting both standard and industrial temperature ranges. Their single-lambda solutions (e.g., 1291/1311nm) allow doubling connections on existing fiber infrastructure .
• NEC: Supplies 100G QSFP28 BiDi transceivers with ZR4 BiDi technology, using four wavelengths in the LWDM band for bidirectional transmission up to 80 km, suitable for long-haul and metro networks .

Technical Features

• Wavelength Division Multiplexing (WDM): Enables bidirectional traffic on a single fiber using distinct wavelengths, creating a virtual two-lane highway .
• PAM4 Modulation: Encodes 2 bits per symbol, doubling data capacity per wavelength and achieving 100G bandwidth efficiently .
• Reach: Modules support distances from short intra-data center links (100m) to long-haul applications (up to 80 km) depending on the manufacturer and wavelength configuration .
• Temperature Range: Standard modules operate from 0°C to 70°C, while industrial versions can handle -40°C to +85°C .

Applications

• 5G Transport Networks: High-capacity backhaul between 5G core networks and base stations, especially where fiber is limited .
• Data Center Interconnect (DCI): Cost-effective, low-latency 100G connections between data centers, reducing leased fiber costs .
• HD Video & Live Broadcasting: Supports 4K/8K streaming, remote medical imaging, and surveillance with minimal signal loss .

Advantages

• Fiber Savings: Reduces fiber usage by 50%, lowering deployment and cabling costs .
• Simplified Network Architecture: Fewer patch cables and reduced cabling complexity improve operational efficiency .
• Easy Integration: Compatible with existing network equipment, enabling seamless upgrades without replacing fiber infrastructure . These modules are widely adopted in telecom, data center, and enterprise networks, providing a scalable, cost-efficient solution for high-speed 100G connectivity.