OLT optical module uses single-mode

Single-mode OLT optical modules are designed for long-distance fiber connections in PON networks, typically supporting distances from 20 km up to 60 km with high-speed data transmission.

Overview of Single-Mode OLT Modules

A single-mode OLT optical module is a transceiver used in an Optical Line Terminal (OLT) to connect the service provider's network to multiple Optical Network Units (ONUs) or Terminals (ONTs) over a single-mode fiber (SMF) network . These modules convert electrical signals from the OLT into optical signals for transmission over fiber and vice versa, enabling high-speed data delivery in FTTH deployments .

Key Specifications

• Transmission Distance: Single-mode modules typically support 20 km to 60 km, depending on the model and network design .
• Data Rates: Modules can support symmetric speeds (e.g., 10 Gbps downstream and upstream) or asymmetric speeds (e.g., 10 Gbps downstream and 2.5 Gbps upstream) for XG-PON or XGS-PON networks .
• Wavelengths: Common Tx/Rx wavelengths include 1490 nm/1310 nm for GPON and 1577 nm/1270 nm for XGS-PON .
• Connector Types: SC/APC or SC/UPC simplex connectors are standard for single-mode modules .
• Power Supply: Typically 3.3V ±5% with low current consumption, designed for hot-pluggable operation .
• Monitoring and Control: Modules often include DDM/DOM features for monitoring optical power, temperature, and laser status .

Applications

Single-mode OLT modules are used in:

• FTTH networks to connect multiple subscribers over long distances.
• Enterprise or distributed networks where high-speed, stable connections are required.
• XG-PON/XGS-PON deployments supporting split ratios up to 1:128, allowing a single OLT port to serve many ONUs .

Installation and Handling

• Static Sensitivity: Handle modules carefully to avoid electrostatic discharge.
• Dust Protection: Keep dust caps on connectors when not in use to prevent contamination.
• Physical Care: Avoid dropping or applying excessive force to the module, as this can damage the optical interface .
• Hot-Plugging: Supported, but ensure proper power filtering and termination to prevent inrush current issues .

Advantages of Single-Mode OLT Modules

• Longer Reach: Single-mode fiber allows transmission over tens of kilometers without significant signal loss.
• High Bandwidth: Supports high-speed data rates suitable for modern broadband services.
• Scalability: Compatible with large split ratios and multiple ONUs, making it ideal for dense subscriber networks. In summary, single-mode OLT optical modules are essential components for high-performance PON networks, providing reliable, long-distance connectivity for FTTH and enterprise applications while supporting advanced monitoring and management features .