A single-core PTN optical module enables bidirectional data transmission over a single optical fiber using WDM technology, making it ideal for compact, efficient metro and regional networks.

Overview

A single-core optical module uses Wavelength Division Multiplexing (WDM) to transmit and receive optical signals over a single fiber, unlike traditional dual-port modules that require separate fibers for TX and RX. The module contains an internal filter that separates different wavelengths, allowing simultaneous bidirectional communication on one fiber. These modules are typically deployed in pairs to complete the two-way transmission path .

Key Features

• Wavelengths: Commonly 1310/1550 nm, 1310/1490 nm, or 1510/1590 nm .
• Power Supply: Single +3.3V or +5V supply.
• Data Interface: LVPECL or PECL.
• Operating Temperature: Industrial grade -40°C to +85°C; commercial grade 0°C to +70°C.
• Standards Compliance: GR-468-core, Laser Class 1, IEC60825-1, RoHS .

Advantages

• Fiber Efficiency: Reduces fiber usage by half compared to dual-core modules.
• Compact Design: Ideal for space-constrained PTN deployments.
• Cost-Effective: Lower fiber and installation costs.
• Industrial Reliability: Supports wide temperature ranges and meets industry safety standards .

Applications in PTN

In Packet Transport Networks (PTN), single-core optical modules are used to:

• Connect metro and regional nodes efficiently.
• Support high-capacity, low-latency data transmission over existing fiber infrastructure.
• Integrate with flexible packet-optical platforms like Nokia 7100, which combine transponders, muxponders, and OTN switching in compact chassis .
• Enable network modernization without extensive fiber upgrades, leveraging single-mode fiber for long-distance, low-loss transmission .

Considerations

• Pairing Required: Single-core modules must be used in pairs for full bidirectional communication.
• Compatibility: Ensure wavelength alignment and interface compatibility with existing PTN equipment.
• Distance and Loss: Performance depends on fiber type, distance, and optical loss; single-mode fibers are preferred for long-haul applications . Single-core PTN optical modules are increasingly popular in modern optical networks due to their efficiency, compactness, and cost-effectiveness, making them suitable for both industrial and commercial deployments .