Semiconductor optical heterodyne detector
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United States of America Patent
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Feb 20, 1990
Grant Date -
N/A
app pub date -
Dec 28, 1987
filing date -
Dec 28, 1987
priority date (Note) -
Expired
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Abstract
There is provided by this invention an optical heterodyning device comprised of a semiconductor heterostructure having a forward biased electrode connected thereto for optically mixing an input signal frequency with a local oscillating frequency in the separate confined laser cavity and a reverse biase electrode connected thereto for detecting the intermediate frequency produced. The local oscillator provides preamplification in the laser cavity and can be effectively phase locked to the input signal frequency.
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