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Joint Optical Wireless Power and Information Transfer to Implantable Electronic Devices Exploiting NIR Light
Summary
This study demonstrates joint optical wireless power and information transfer for implantable electronic devices (IEDs) through 40mm of tissue. This innovation enhances IEDs
Area of Science:
- Biomedical Engineering
- Optical Communications
- Implantable Electronic Devices
Background:
- Implantable electronic devices (IEDs) require secure wireless communication and extended battery life.
- Current wireless power and data transfer methods face limitations with biological tissue penetration.
- Need for robust energy harvesting and data transmission for advanced IEDs.
Purpose of the Study:
- To propose and experimentally validate an application-oriented setup for joint optical wireless power and information transfer for IEDs.
- To achieve reliable data and power transmission through up to 40 mm of biological tissue.
- To enhance the security, functionality, and longevity of future IEDs.
Main Methods:
- Utilized near-infrared (NIR) light (810 nm) for transmission.
- Employed a tissue-mimicking phantom to simulate human soft tissue.
- Integrated commercial off-the-shelf (COTS) components: LED driver, NIR LED, photovoltaic (PV) cell, photodetector amplifier (PDA), and power management integrated circuit (PMIC).
- Designed a receiver combining a PV cell for power and a PDA for data reception.
- Incorporated a supercapacitor for secondary energy storage.
Main Results:
- Demonstrated joint data and power transmission through 40 mm of simulated tissue.
- Successfully transmitted a high-definition image to the PDA while harvesting energy via the PV cell.
- Evaluated communication performance, charging, and discharging capabilities experimentally.
- Confirmed the feasibility of wireless recharging and secure data transfer for IEDs.
Conclusions:
- The proposed experimental setup enables effective joint optical wireless power and information transfer for IEDs across significant biological tissue depths.
- This approach addresses key requirements for future IEDs, including enhanced security and battery lifespan through energy harvesting.
- Paves the way for advancements in medical telemetry and wireless recharging applications, improving IED functionality and longevity.
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