Polarization insensitive optical communication device utilizing optical preamplification
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United States of America Patent
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Feb 13, 1990
Grant Date -
N/A
app pub date -
Jul 15, 1988
filing date -
Jul 15, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polarization insensitive optical device is disclosed which is capable of providing direct optical amplification of an input signal of unknown (and possibly varying) polarization. A polarization diversity technique is utilized wherein a polarization beam splitter is used to divide the incoming signal into orthogonal components of known polarization (TE,TM). The orthogonal components are then separately amplified, using a semiconductor laser as the amplifying device. The amplified components are then recombined, either optically or electrically, to form the final output signal.
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