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Patent Searching and Data


Title:
OPTICAL SPACE COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/003893
Kind Code:
A1
Abstract:
This optical space communication device is provided with: a reference light source (11) that outputs light corresponding to injection current; a signal splitting unit that splits light into a single instance of local oscillation light and a plurality of instances of signal light; a phase modulator (31) for modulating the phase of the signal light; an optical amplifier (32) that amplifies the signal light after modulation thereof; an optical phased array optical unit (5) that combines the amplified signal light and the local oscillation light and emits the result into space; an optical reception unit (35) that obtains a beat signal from the amplified signal light and the local oscillation light and obtains a baseband signal from the signal light and signal light received from a satellite; a signal processing unit (6) that detects fluctuation in the baseband on the basis of the baseband signal; a loop filter (7) that controls the injection current to the reference light source (11) on the basis of the fluctuation so as to reduce the fluctuation; a phase control unit that controls the modulation amount in the phase modulation unit on the basis of the beat signal so as to synchronize the beat signal to a reference signal; a gimbal (9) that controls the operation of the optical phased array optical unit (5); and a signal processing unit (10) that uses the signal light from the satellite and orbit information regarding the satellite as a basis to control the phase control unit and the gimbal (9) and perform supplementary tracking of the satellite.

Inventors:
SUZUKI TAKAHIRO (JP)
ANDO TOSHIYUKI (JP)
Application Number:
PCT/JP2020/025965
Publication Date:
January 06, 2022
Filing Date:
July 02, 2020
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04B10/11
Domestic Patent References:
WO2011007658A12011-01-20
Foreign References:
JP6705610B12020-06-03
JP2006333070A2006-12-07
JP2002314487A2002-10-25
US20190324212A12019-10-24
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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