An optical free-space communication apparatus includes a first light-emitting source for emitting a first transmission optical beam having a plane of polarization in a predetermined direction, the first transmission optical beam being modulated according to a primary signal containing communication information, a second light-emitting source for emitting a second transmission optical beam having a plane of polarization perpendicular to the plane of polarization of the first transmission optical beam, the second transmission optical beam being modulated according to an auxiliary signal for angle detection, a transmitting optical system for emitting the first and second transmission optical beams out of the apparatus as optical beams each having a predetermined angle of divergence, and a driving unit for redirecting the outgoing paths of the first and second transmission optical beams, wherein the second transmission optical beam has a larger angle of divergence than the first transmission optical beam.

Claims

6 · 6 independent · depth 1

6 granted claims

›1.independentAn optical free-space communication apparatus comprising:

›2.independentAn optical free-space communication apparatus according to claim 1, further comprising:

›3.independentAn optical free-space communication apparatus according to claim 2, wherein said optical component comprises a receiving polarization beam splitter.

›4.independentAn optical free-space communication apparatus according to claim 2, further comprising a receiving lens for guiding the reception optical beam transmi…

›5.independentmultiple · 1, 2, 3, 4An optical free-space communication apparatus according to any one of claims 1 to 4, wherein said transmitting optical system comprises a transmitting…

›6.independentmultiple · 1, 2, 3, 4An optical free-space communication apparatus according to any one of claims 1 to 4, wherein said driving means comprises a vertical driving unit for …

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H04B1/000

USPC · US Patent Classification

398/122398/129398/131

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Pendency

3.6 y

1,306 days filing → grant

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Examiner

Leslie Pascal

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20010043626 A1	22 Nov 2001

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