Polarization Filtering Device with Rigid Optomechanical Linking
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Solution Overview
Problem
Existing methods for polarizing light signals from guided optics components, such as optical fibers, face challenges with component alignment and signal loss when using non-fiber optic polarizing components, making high-performance polarization manipulation sub-optimal.
Innovation Solution
An all-fiber polarization filtering and orientation device using a single-mode optical fiber connected to a polarizing optical fiber with a rigid optomechanical connection and an adjustment system to control the angular position, allowing for efficient polarization manipulation and orientation of light signals within an all-fiber configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-fibre optic polarizing components (polarizers, prisms, wave plates) are used for polarization manipulation, then polarization filtering function is achieved, but component alignment problems and signal loss occur
Solution Approach 1:
The patent introduces a fibre optic cable as an intermediary medium to connect the light source to the polarizing component. This intermediary allows the system to maintain polarization filtering performance while reducing signal loss through proper optical coupling and alignment, resolving the contradiction between reliability and energy loss.
Solution Approach 2:
The patent changes the physical parameters of the optical path by using fibre optic cables with specific numerical aperture and transmission characteristics. This parameter change enables effective polarization filtering while minimizing signal loss, addressing the contradiction between filtering performance and energy conservation.
2Reliability
If non-fibre optic polarizing components are used, then polarization manipulation is achieved, but component alignment problems occur
Solution Approach 1:
The fibre optic cable acts as a flexible intermediary that simplifies alignment procedures. The cable can be easily connected and positioned, eliminating the complex alignment requirements associated with direct mounting of polarizing components, thus improving ease of operation while maintaining polarization manipulation performance.
Solution Approach 2:
The patent segments the optical system into distinct modular components: light source, fibre optic cable, and polarizing component. This segmentation allows each component to be independently optimized and assembled, significantly simplifying the overall alignment process while preserving polarization manipulation reliability.
3Ease of operation
If fibre optic components are used for all-fibre configuration, then alignment problems are reduced, but device complexity increases
Solution Approach 1:
The fibre optic cable serves multiple functions simultaneously: it transmits light, maintains polarization characteristics, and provides flexible alignment. This multi-functionality reduces the need for additional separate components, thereby simplifying the overall device structure while maintaining ease of operation and alignment capabilities.
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
This solution enables effective polarization filtering and orientation of light signals with reduced signal loss and improved alignment, achieving higher extinction rates and compact device integration, particularly in applications like telecommunications and interferometry.
Implementation Method 1
the polarizing optical fibre has a birefringence and a main signal loss rate along a main polarization axis Ap and a transverse signal loss rate along a transverse polarization axis At
Implementation Method 2
a first end of the rigid optomechanical connection area connecting the downstream end of the first single-mode and the first end of the polarizing optical fibre
Data Source
AI summary
This relates to a fiber-optic polarization orienting and filtering device including a first single-mode optical fiber, having a downstream end, and a polarizing optical fiber, having a first end and a second end, characterized in that the device further includes: a first rigid opto-mechanical linking region connecting the downstream end of the first single-mode optical fiber and the first end of the polarizing optical fiber along a first linking axis; and an orientation adjusting system, the system being suitable for adjusting the angular position of the first linking region about the first linking axis.