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Related Experiment Video

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Long-range wireless optical power transfer system using an EDFA.

Nadeem Javed, Ngoc-Luu Nguyen, Syed Farhan Ali Naqvi

    Optics Express
    |October 15, 2022
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a wireless optical power transfer (WOPT) system for safe, long-range power delivery. It demonstrates a 30m transmission with a novel resonance loop and safety mechanism.

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    Area of Science:

    • Optoelectronics
    • Wireless Power Transfer
    • Laser Engineering

    Background:

    • Wireless optical power transfer (WOPT) systems face challenges in achieving long-range, high-power, and safe energy transmission.
    • Existing systems often struggle with beam divergence and safety concerns over extended distances.

    Purpose of the Study:

    • To propose and demonstrate a novel wireless optical power transfer (WOPT) system utilizing an erbium-doped fiber amplifier.
    • To achieve long-range (30m), high-power, and hazard-free power delivery in free space.
    • To implement an improved safety mechanism for obstacle detection.

    Main Methods:

    • A transmitter generates amplified spontaneous emission (ASE) around 1550 nm, filtered to a safe narrowband beam (1552.25 nm) using WDM.
    • A ball lens retroreflector creates a closed ring resonance loop for power delivery.
    • An optical safety mechanism is integrated to terminate resonance upon detecting an obstacle.

    Main Results:

    • The system achieves 400 mW optical power over 30m with a 1.027 nm channel linewidth.
    • Electrical power of 85 mW is acquired using a gallium antimonide photovoltaic receiver.
    • Incident power is reduced to 0.79 mW post-filtering, well within safety standards.

    Conclusions:

    • The proposed WOPT system offers a viable solution for safe, long-range wireless power transmission.
    • The integrated safety mechanism enhances system reliability and user safety.
    • This technology has potential applications in scenarios requiring remote and secure power delivery.