Type 128 optical module

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A Type 128 optical module typically refers to a 1x128 optical splitter or switch used to distribute or route optical signals in fiber networks.

1x128 Optical Splitter Module

A 1x128 PLC (Planar Lightwave Circuit) optical splitter is designed to divide a single optical input into 128 outputs, providing uniform signal distribution for applications like FTTH, EPON, GPON, XGS-PON, and CATV systems . Key features include:

Low insertion loss and low polarization-dependent loss (PDL) for efficient signal transmission .
Compact ABS box housing with SC/APC, LC, or FC connectors for easy field installation .
Single-mode operation, typically using silica optical waveguide technology for reliable performance .
Ideal for passive optical networks, enabling one fiber to serve multiple endpoints.

1x128 Optical Switch Module

A 1x128 optical switch is an opto-mechanical device that can selectively transmit, redirect, or block optical signals across 128 output ports . Key characteristics include:

Bidirectional operation, usable in 1x128 or 128x1 configurations .
Supports single-mode and multimode fibers with wavelengths like 850 nm, 1310 nm, or 1550 nm .
Often available in rackmount formats (1U, 2U, 3U) with customizable channel counts and connector types (SC, LC, FC, MPO, etc.), .
Used in optical communication networks, testing, and measurement instruments for dynamic path control.

Optical Module Fundamentals

Optical modules, including splitters and switches, operate at the physical layer of fiber networks, converting electrical signals to optical signals and vice versa when needed . Splitters passively divide light, while switches actively control the optical path. Both types are essential for network scalability, signal management, and efficient fiber utilization.

Summary

1x128 PLC Splitter: Passive device, splits one input into 128 outputs, ideal for PON and FTTH networks .
1x128 Optical Switch: Active device, routes optical signals to selected outputs, suitable for testing and dynamic network management .
Installation: Splitters are compact and field-ready; switches are often rack-mounted with multiple connector options . Choosing between a splitter or switch depends on whether the application requires passive signal distribution or active optical path control.

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