Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-10-04
1994-06-21
Chilcot, Jr., Richard E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359192, 359156, H04B 1006
Patent
active
053232585
ABSTRACT:
A homodyne optical receiver includes a polarization beam splitter for dividing an optical signal into an optical signal with horizontal polarization and an optical signal with vertical polarization. Optical couplers combine two optical signals of the two polarized components with two optical local signals, which signals are almost matched therewith in polarization, and in a state where they are matched with each other in phase. Detectors homodyne-detect respective output optical signals of the optical couplers and two weighting circuits assign output signals of the detectors weights which are approximately proportional to amplitudes thereof, respectively. An adder adds output signals of the weighting circuits.
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Kitajima Shigeki
Kuboki Katsuhiko
Sasaki Shinya
Takeyari Ryoji
Tsushima Hideaki
Chilcot Jr. Richard E.
Hitachi , Ltd.
Negash K.
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