Common aperture holographic optical element devices for a free space optical transceiver
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United States of America Patent
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Jul 22, 2003
Grant Date -
N/A
app pub date -
May 9, 2001
filing date -
May 9, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A free space optical transceiver includes a first holographic optical element (HOE) device having a first recorded interference pattern to diffract a received light signal into a plurality of orders. A second HOE device has a second recorded interference pattern and is positioned relative to the first HOE device to reflect the orders of the diffracted light signal towards corresponding optical components. Use of the reflected orders in this manner in conjunction with the optical components provides the transceiver with multiple functionalities, such as communication, tracking, and alignment. Also, the first and second HOE devices have their interference patterns recorded on an emulsion material that is shaped to provide a common aperture through which to pass a transmitted light signal, thereby adding to the overall compactness of the transceiver.
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