PON Dual System Module Wavelength Separation
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Solution Overview
Problem
Existing optical transmission modules are limited to supporting a single communication system, making it difficult to upgrade networks to support multiple systems simultaneously without rearranging optical fiber transmission lines and replacing data machines, especially in narrow spaces.
Innovation Solution
A passive optical network dual system module comprising a light guide unit, optical path conversion unit, and optical transceiver unit, which includes collimating lenses and filters to manage optical signals of different wavelengths, allowing for simultaneous support of two communication systems within a single module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single optical transmission module is used, then the device complexity is reduced, but the adaptability to support multiple communication systems deteriorates
Solution Approach 1:
The optical transmission module is designed to support multiple communication systems (GPON and XGS-PON) through a universal structure that includes both legacy and advanced receiving/transmitting parts. The wavelength division multiplexing capability allows the same module to handle different wavelength signals, making it adaptable to both old and new network systems simultaneously.
Solution Approach 2:
The module is segmented into distinct functional components: a first receiving part for legacy systems, a second receiving part for advanced systems, a transmitting part with wavelength division multiplexing capability, and filtering components. This segmentation allows each component to be optimized for its specific function while working together in a unified module.
2Adaptability or versatility
If two groups of receiving parts and transmitting parts are installed, then the adaptability to support two systems is improved, but the area occupied by the module increases
Solution Approach 1:
The module employs a nested arrangement where the first receiving part and second receiving part are positioned to share common optical paths and structural supports. The transmitting part utilizes wavelength division multiplexing to share the same physical infrastructure for both upward and downward wavelength signals, effectively nesting multiple functions within a compact footprint.
Solution Approach 2:
The design transitions from horizontal space occupation to vertical stacking arrangement. The receiving parts are arranged in different spatial dimensions with shared optical benches and mounting structures, allowing dual system support without proportionally increasing the module's planar area.
3Measurement precision
If filtering components are added for wavelength separation, then the measurement precision of signal routing is improved, but the device complexity increases
Solution Approach 1:
Filtering components act as intermediaries between the optical fiber input and the receiving parts. These filters precisely separate different wavelength signals (1490nm, 1550nm, 1310nm) by directing them to appropriate receiving or transmitting paths, enabling accurate wavelength-based signal routing without complex control mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the simultaneous operation of two communication systems without increasing the overall space requirements, maintaining effective signal transmission and reducing the need for hardware replacement costs.
Implementation Method 1
a first collimating lens, a first filter, a second filter, a second collimating lens... wherein the first collimating lens and the second collimating lens make the optical signal form parallel light
Implementation Method 2
the light emitter has like laser diode, has the light receiver of light receiving source, can let the light of one wavelength pass but reflect another at the same time. A wavelength optical filter...
Implementation Method 3
the optical transmitter capable of simultaneously outputting the emitted light and inputting the received light... convert electrical signals into optical signals
Implementation Method 4
the optical receiver 12 having a light receiving source... convert optical signals into electrical signals
Data Source
AI summary
A passive optical network dual system module includes a light guide unit, an optical path conversion unit and an optical transceiver unit. The light guiding unit is connected to the optical fiber and is suitable for transmitting optical signals. The optical path conversion unit is connected to the light guide unit, and is suitable for receiving optical signals and changing the optical path of the optical signals. It is used in the optical transceiver unit for the configuration of two receiving parts and two transmitting parts, which can support the same optical path at the same time with use of two sets of communication protocol systems.