公开(公告)号：US20210364642A1

公开(公告)日：2021-11-25

申请号：US17278306

申请日：2019-06-03

Applicant: National Institute of Information and Communications Technology

Inventor： Keizo INAGAKI ,  Toshimasa UMEZAWA ,  Naokatsu YAMAMOTO ,  Tetsuya KAWANISHI

IPC: G01S17/894 ,  G01S7/48 ,  G02F1/295

Abstract: [Problem] To provide a camera with high sensitivity even if an output to the outside is weak. [Solution] This camera includes a light source 3, a demultiplexing unit 5 which demultiplexes light from the light source 3 into first demultiplexed light and second demultiplexed light, a first modulator 7 which modulates the first demultiplexed light to obtain a modulated signal, an emission unit 9 which emits the modulation signal modulated by the first modulator 7, and a phase imparting means 11 which imparts a plurality of types of phase shifts to the second demultiplexed light to obtain phase-imparted local light. The camera further includes a multiplexing unit 13 which multiplexes light incident from the outside of the camera and the phase-imparted local light and obtains multiplexed light, a light receiving element 17 which detects the multiplexed light, and includes a light receiving unit 15, and an analysis processing unit 19 which, on the basis of the multiplexed light received by the light receiving element 17, analyzes the position of a subject or the distance between the subject and the camera.

公开(公告)号：US20200044745A1

公开(公告)日：2020-02-06

申请号：US16494766

申请日：2018-03-07

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Toshimasa UMEZAWA ,  Takahide SAKAMOTO ,  Atsushi KANNO ,  Naokatsu YAMAMOTO ,  Tetsuya KAWANISHI

IPC: H04B10/60 ,  H01L27/144 ,  G02B6/42 ,  H04J14/04 ,  H04B10/2581

Abstract: To provide a photodetector which enables reception of massively parallel optical communication, and with which a large volume of data for multi-mode transmission or multi-core transmission can be received instantaneously at once. A photodetector comprising a two-dimensional photodetector array in which a plurality of photodetectors 9 are arranged in a two-dimensional array, and which includes a wire 12 having a width of not more than 4 μm between the plurality of photodetectors. Each of the photodetectors has a light reception area with a side measuring not more than 100 μm. The plurality of photodetectors arranged in a two-dimensional array are spaced apart from each other by not less than 20 μm.

公开(公告)号：US20190020319A1

公开(公告)日：2019-01-17

申请号：US16069457

申请日：2017-01-10

Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY

Inventor： Toshimasa UMEZAWA ,  Kouichi AKAHANE ,  Atsushi MATSUMOTO ,  Atsushi KANNO ,  Naokatsu YAMAMOTO ,  Tetsuya KAWANISHI

IPC: H03F3/19 ,  H03F3/08 ,  H03F1/02 ,  H04B10/69

Abstract: There is provided a photoelectric converter that converts an optical signal into an electrical signal for amplification, the photoelectric converter including a photoelectric conversion element that converts the optical signal into an electrical signal and outputs the electrical signal from an output terminal, a high-frequency amplifier that includes an input terminal of an electrical signal output from the output terminal and a DC cut-off capacitor which is disposed at an output stage of the input terminal and is serially connected to the input terminal and that amplifies the electrical signal, and an inductance element that is disposed between a bias power supply applying bias voltage or bias current to the photoelectric conversion element and the input terminal and which is connected in parallel to the DC cut-off capacitor.