Textile with Embedded Photodetector for Optical Communication
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Solution Overview
Problem
Current communication technologies lack a secure, high-bandwidth medium for data transmission, particularly in the context of wearable devices, where the human body can effectively receive free space optical (FSO) signals due to its surface area, but integration of FSO with textiles has been negligible.
Innovation Solution
A textile capable of detecting electromagnetic radiation, featuring interlaced fibers with embedded photodetectors and electrical conductors, including a tungsten wire for electrical contact and mechanical stability, integrated into garments for seamless optical wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FSO technology is integrated with textiles for wearable communication, then secure high-bandwidth data transmission is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The photodetector is embedded within the fiber structure itself, with the photodetector positioned in a pocket of the preform material and surrounded by shielding. This nesting approach integrates the detection function directly into the textile fiber, achieving secure FSO communication capability while maintaining a compact wearable structure.
Solution Approach 2:
The fiber is constructed as a composite structure combining photodetector material, preform material (forming the fiber body), and shielding material. This composite approach enables the textile to simultaneously provide mechanical support, optical detection, and electromagnetic shielding functions for reliable FSO communication.
2Ease of manufacture
If photodetectors are embedded within fibers during the draw process, then seamless integration is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The photodetector is positioned within a pocket of the preform material before the fiber draw process begins. The preform is prepared in advance with the photodetector embedded in its lowest energy configuration relative to the flow pattern, ensuring correct positioning is achieved during the subsequent draw process without requiring complex real-time control.
Solution Approach 2:
The preform material is designed with a specific pocket structure at the local position where the photodetector will be embedded. This localized structural feature ensures the photodetector is positioned correctly within the fiber during drawing, achieving precise positioning through the preform's geometric design rather than complex manufacturing control.
3Reliability
If electrical conductors are extended within fibers for photodetector contact, then electrical connectivity is achieved, but mechanical stability and signal interference increase
Solution Approach 1:
A shielding structure is introduced as an intermediary element surrounding the photodetector and electrical conductors within the fiber. This shielding acts as a mediator that blocks external electromagnetic interference from reaching the sensitive photodetector and conductor, while allowing electrical connectivity to be maintained through the shielded structure.
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 secure, high-bandwidth data transmission through FSO signals within the visible to near-infrared spectrum, while maintaining the aesthetic and protective qualities of conventional textiles, with effective signal amplification and interference rejection.
Implementation Method 1
a photodetector (e.g., a photodiode) embedded, as a result of a fiber draw process, within a particular one of the fibers
Data Source
AI summary
A textile capable of detecting electromagnetic radiation includes interlaced fibers; a photodetector embedded, as a result of a fiber draw process, within a particular one of the fibers; and a first electrical conductor extending within the particular fiber and along a longitudinal axis thereof. The first electrical conductor is in electrical contact with the photodetector, and the photodetector position in the particular fiber corresponds to a lowest energy configuration relative to a pattern of flow along the longitudinal axis of the particular fiber throughout the fiber draw process. A method of manufacturing the textile and a system including the textile are also disclosed.