Pluggable Variable Optical Attenuator With Modular Interface
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Solution Overview
Problem
Current optical communication networks lack pluggable variable optical attenuators, which limits flexibility and upgradeability, as existing VOAs are not designed for easy insertion and removal without disrupting system synchronization or requiring power resets.
Innovation Solution
Design of pluggable variable optical attenuators with optical and electrical interfaces, featuring beam blockers or tilting mirrors for adjustable attenuation, allowing electronic or manual control and integration with hosting systems for seamless connectivity and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional VOA design with fiber ports is used, then optical signal attenuation function is achieved, but system flexibility and upgradeability are limited
Solution Approach 1:
The VOA device is segmented into a modular pluggable unit that can be independently inserted and removed from the optical network. The device includes a housing with a front end and rear end, where the front end contains fiber optic interface components and the rear end contains the VOA mechanism. This segmentation allows the VOA to be treated as a discrete, replaceable module that can be upgraded or replaced without affecting the entire optical network infrastructure.
Solution Approach 2:
The pluggable VOA design provides universal applicability across different optical network configurations. The standardized interface and housing structure allow the same VOA module to be used in various optical network nodes, enabling single-point-of-failure elimination and facilitating easy upgrades without requiring custom integration for each application scenario.
2Ease of operation
If VOA is inserted or removed from optical network, then device upgrade or addition is enabled, but system synchronization may be disrupted
Solution Approach 1:
The VOA module is designed with pre-assembled fiber optic interfaces and alignment mechanisms that ensure proper connection before insertion. The housing structure includes pre-positioned fiber optic interface components that automatically align with the optical network infrastructure upon insertion, eliminating the need for complex field alignment operations and ensuring immediate operational readiness without disrupting system synchronization.
3Ease of manufacture
If VOA requires power reset when replacing or upgrading, then device replacement is enabled, but system interruption occurs
Solution Approach 1:
The pluggable VOA design maintains continuous optical signal transmission during replacement operations. The housing structure and fiber optic interface components are designed to maintain alignment and connection continuity, allowing the optical network to continue operating without interruption even when the VOA module is being replaced or upgraded. This eliminates the need for power resets and system reinitialization that would otherwise cause service disruption.
4Device complexity
If fiber ports are not specially prepared, then device simplicity is maintained, but optical signal fidelity and alignment stability are compromised
Solution Approach 1:
The fiber optic interface components are pre-assembled and pre-aligned within the housing structure during manufacturing. The housing includes pre-positioned fiber optic interface components with built-in alignment features that ensure proper optical coupling before the device is installed in the optical network. This preliminary preparation eliminates the need for complex field alignment operations while ensuring stable and repeatable optical signal fidelity.
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 flexible and efficient power management in optical networks by allowing VOAs to be easily added or upgraded without interrupting system operation, ensuring stable and repeatable optical signal fidelity and alignment.
Implementation Method 1
beam blockers or tilting mirrors for adjustable attenuation
Implementation Method 2
tilting mirrors for adjustable attenuation
Implementation Method 3
an optical fiber adaptor coupled to the VOA and having a set of ports for accepting at least an input optical fiber and an output optical fiber
Data Source
AI summary
Various designs of pluggable variable optical attenuator (VOA) are disclosed. A pluggable VOA has an optical fiber adaptor connected to an internal VOA via different fiber optical interface configurations. At least a pair of ports is provided to accept optical fibers or external optical fiber ferrules for optical pluggability. The VOA is controlled electronically or manually. To facilitate a control of the VOA via a hosting system, an electronic device and/or interface is provided. External commands take the control of the VOA and set an attenuation level within a specification when the pluggable variable optical attenuator device is connected to a hosting system.