Optical power supply system and optical power supply method

The optical power supply system addresses the inefficiency of conventional methods by redirecting unused optical signals in PON networks using a bidirectional optical splitter and circulator, reducing fiber installations and costs, and enhancing power supply efficiency.

WO2024261851A1PCT designated stage expired Publication Date: 2024-12-26NIPPON TELEGRAPH & TELEPHONE CORP
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Patent Information

Application Number
PCT/JP2023/022742
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-20
Publication Date
2024-12-26

AI Technical Summary

Technical Problem

Conventional optical power supply methods require the installation of long-distance optical fibers, leading to increased installation costs and inefficiency in utilizing unused optical signals in PON networks for power transmission.

Method used

An optical power supply system that utilizes a multi-input, multi-output bidirectional optical splitter and an optical circulator to redirect unused optical signals from both the user's home and central office sides, converting upstream signals into downstream signals to power devices without the need for extensive new fiber installations.

Benefits of technology

This approach reduces the number of required optical fibers, suppresses cost increases, and effectively utilizes wasteful optical signals for power supply while maintaining safety and efficiency in optical power transmission.

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Abstract

An optical power supply system according to the present invention comprises: an optical power supply unit that supplies power obtained from a received optical signal to a power supply target apparatus; a multi-input–multi-output, bidirectional optical splitter that transfers a first optical signal transmitted from a first light source to a second light source side and the optical power supply unit, and transfers a second optical signal transmitted from the second light source to the first light source side and the optical power supply unit; and a folding part that, by means of an optical fiber connecting two terminals on one side of the optical splitter, converts uplink directions and downlink directions of optical signals output from the optical splitter and re-inputs the optical signals to the optical splitter. The optical power supply unit combines power obtained from the first optical signal, the first optical signal having been transmitted from the first light source and transferred through the optical splitter, and power obtained from the second optical signal, the second optical signal having been transmitted from the second light source, output to the folding part via the optical splitter, changed in direction, and then transferred again through the optical splitter, and outputs the combined power to the power supply target apparatus.
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Citation Information

Patent Citations

  • Optical communication system and power supply method

    JP2018064231A

  • Optical communication transceiver and optical power supply system

    JP2018174478A

  • Optical power feeding system, optical power feeding method, and power receiving optical communication device

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