PON optical module specifications

PON optical modules are classified into OLT, ONU, and stick modules, with common form factors including SFP, SFP+, SFP28, XFP, and QSFP112.

Overview of PON Modules

A PO

N module is an optical transceiver designed for Passive Optical Network applications, enabling high-speed data, voice, and video transmission over fiber-optic networks. These modules are essential active components in a PON system, handling electrical-to-optical (E-O) and optical-to-electrical (O-E) conversions, managing wavelengths for upstream and downstream traffic, and supporting burst-mode reception for asynchronous upstream signals.

Types of PO

N ModulesOLT (Optical Line Terminal) ModulesLocated at the service provider's central office or data center. Responsible for generating, scheduling, and distributing optical signals to multiple ONUs. Handles upstream signals from ONUs using burst-mode receivers.

Supports standards like GPON, EPON, XG-PON, XGS-PON, and NG-PON2.

ON

U (Optical Network Unit) ModulesInstalled at the subscriber or customer premises. Converts optical signals from the OLT into electrical signals for user devices and vice versa. Typically corresponds to a single household or subscriber, providing network access and communication services.

Stick Modules

Connect subscriber equipment directly to the fiber network. Often used for smaller-scale or specialized connections at the network edge. Form FactorsPON modules come in various form factors to fit different network equipment: SFP (Small Form-factor Pluggable) – most common for GPON and EPON.

SFP+ – supports higher data rates, often used in XG-PON or XGS-PON. SFP28 – designed for 25 Gbps applications.

XF

P – older high-speed module standard. QSFP112 – supports ultra-high-speed PON networks. The choice of form factor depends on the required data rate, network standard, and equipment compatibility.

Standards and WavelengthsPON modules adhere to standards such as GPON (ITU-T G. 984), XG-PON (ITU-T G. 987), and EPON, with specific wavelengths for upstream (1270–1310 nm) and downstream (1490–1577 nm) traffic.

Some modules also support a third wavelength for video transmission (1550–1610 nm),.

Summary

In essence, PON optical modules are categorized by their network role (OLT, ONU, stick) and form factor (SFP, SFP+, SFP28, XFP, QSFP112). They are critical for enabling efficient, high-speed, and cost-effective fiber-optic broadband services, ensuring reliable communication between service providers and end users.