RELATED APPLICATIONS

The present application is a National Phase of International Application No. PCT/JP2020/025129 filed Jun. 26, 2020, which claims priority to Japanese Application Nos. 2019-134238 filed Jul. 22, 2019, and 2019-134241 filed Jul. 22, 2019.

TECHNICAL FIELD

The present disclosure relates to optical power supply.

BACKGROUND ART

Recently, there has been studied an optical power supply system that converts electric power into light (called feed light), transmits the feed light, converts the feed light into electric energy, and uses the electric energy as electric power.

There is disclosed in Patent Literature 1 an optical communication device that includes: an optical transmitter that transmits signal light modulated with an electric signal and feed light for supplying electric power; an optical fiber including a core that transmits the signal light, a first cladding that is formed around the core, has a refractive index lower than that of the core, and transmits the feed light, and a second cladding that is formed around the first cladding, and has a refractive index lower than that of the first cladding; and an optical receiver that operates with electric power obtained by converting the feed light transmitted through the first cladding of the optical fiber, and converts the signal light transmitted through the core of the optical fiber into the electric signal.

CITATION LIST

Patent Literature

Patent Literature 1: JP 2010-135989 A

SUMMARY OF INVENTION

Problem to Solve

In optical power supply, further improvement of optical power supply efficiency is required. As one way therefor, achievement of efficient power supply according to the electric power load at the power receiving side is required.

Solution to Problem

An optical power supply system according to an aspect of the present disclosure includes:

a power sourcing equipment that outputs feed light;

a powered device that converts the feed light into electric power, wherein the feed light is from the power sourcing equipment, and the electric power obtained by the conversion by the powered device is supplied to a communicator;

an information obtaining part that obtains communication operation information on an operation status of communication that is performed by the communicator; and

a power supply controller that, based on the communication operation information obtained by the information obtaining part, controls output of the feed light from the power sourcing equipment.

An optical power supply system according to another aspect of the present disclosure includes:

a power sourcing equipment that outputs feed light;

an optical branching device to which the feed light from the power sourcing equipment is input and to which a plurality of powered devices that convert the feed light into electric power is connectable;

a detector that detects the number of powered devices connected to the optical branching device; and

a power supply controller that, based on the number of connected powered devices detected by the detector, controls output of the feed light from the power sourcing equipment.

