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N2a optical module

Fiber and communications infrastructure knowledge brief Published 12 Apr 2022

Prepared for preliminary research by the ENSAA knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

The N2a optical module is a high-power XG-PON OLT transceiver supporting asymmetric 10G/2. 5G data rates over single-mode fiber up to 20 km with SC/PC or SC/UPC connectors.

Key Optical and Performance Parameters

Data Rates: 9. 953 Gbps downstream, 2. 488 Gbps upstream for asymmetric XG-PON operation, compliant with ITU-T G.

987. 2 standard (XG-PON). Wavelengths: 1577 nm for downstream transmission, 1270 nm for upstream reception.

Optical Power: Transmitter output ranges from +4 to +8 dBm; receiver sensitivity reaches -29. 5 dBm, providing a link budget of approximately 31–33. 5 dB depending on the module variant.

Transmission Distance: Supports up to 20 km over standard single-mode fiber (SMF), with distance calculations considering optical budget, splitter losses, and fiber attenuation. Optical Class: N2a high-power class, suitable for higher split ratios (up to 1: 128) and extended reach in FTTx deployments.

Physical and Electrical Characteristics

Form Factor: Available in SFP+ and XFP packages for OLT chassis integration. Connector Type: Single SC/PC or SC/UPC simplex connector for bidirectional single-fiber operation. Electrical Interface: Compliant with SFF-8431, SFF-8432, and SFF-8472 MSA standards, ensuring multi-vendor compatibility.

Power Supply: Operates with 3. 3V or 5V options, hot-pluggable for flexible installation. Operating Temperature: Typically 0–70°C, suitable for standard access network environments.

Optical Components and Features

Transmitter: High-power 1577 nm EML or DFB laser. Receiver: High-sensitivity 1270 nm APD burst-mode photodiode. Digital Diagnostics: Supports DDM/DOM for real-time monitoring of optical power, temperature, voltage, and laser bias current.

Compliance: RoHS6 environmental compliance and low EMI/ESD protection for network stability.

Applications

Designed for XG-PON OLT ports in fiber-to-the-home (FTTH) and fiber-to-the-premises (FTTP) networks. Suitable for high-density deployments requiring extended reach and high split ratios. Compatible with multiple OLT vendors due to standard SFP+/XFP interfaces and MSA compliance.

This module provides a robust solution for service providers seeking high-performance, long-reach, and high-split-ratio optical transceivers in next-generation passive optical networks.

N2a optical module - ENSAA OPTICAL NETWORKS [PDF]

N2a optical module

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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