Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-03-19
2000-11-28
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359153, 359159, H04B 1000
Patent
active
061542970
ABSTRACT:
An optical transceiver that is particularly adapted for free-space optical telecommunication uses the same optical path for received and transmitted light to a large extent to avoid duplication of optical elements. Received light is split so that different portions can be sent to physically spaced photodetectors, one of which is for detecting optically received information, and others of which are for detecting misalignment of the transceiver. In this way, the alignment detectors do not interfere with light reception by the information detector.
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Javitt Joel I.
Rutledge Christopher L.
AT&T Corp
Pascal Leslie
Phan Hanh
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