US 12,308,890 B2
Optical power reception apparatus, communication apparatus and optical power reception method
Kyo Minoguchi, Musashino (JP); Hiroaki Katsurai, Musashino (JP); Yoichi Fukada, Musashino (JP); and Tomoaki Yoshida, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/025,673
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Sep. 14, 2020, PCT No. PCT/JP2020/034721
§ 371(c)(1), (2) Date Mar. 10, 2023,
PCT Pub. No. WO2022/054282, PCT Pub. Date Mar. 17, 2022.
Prior Publication US 2023/0344525 A1, Oct. 26, 2023
Int. Cl. H04B 10/80 (2013.01); H02J 7/35 (2006.01); H04B 10/60 (2013.01)
CPC H04B 10/807 (2013.01) [H02J 7/35 (2013.01); H04B 10/60 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An optical power receiving device comprising:
a photodiode that has a light receiving portion connected to an external light source via an optical transmission line;
a power storage that stores electrical energy generated by the photodiode; and
a bias circuit configured to take out electrical energy corresponding to an amount of stored power from the power storage, and configured to apply a voltage to a cathode of the photodiode,
wherein the bias circuit does not take out the electrical energy from the power storage and charges the power storage with the electrical energy while the amount of stored power in the power storage is smaller than a threshold, and takes out the electrical energy for applying a voltage related to a predetermined bias voltage value from the power storage when the amount of stored power in the power storage becomes equal to or larger than the threshold by charging the power storage with the electrical energy.