All optical inverter/amplifier
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United States of America Patent
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Mar 5, 2002
Grant Date -
N/A
app pub date -
Mar 17, 2000
filing date -
Mar 20, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an optical function device which is capable of inverting and amplifying an optical signal of the optical communication wavelength band, and executing operation of an image optical signal, and is operable in a wide temperature range, said optical function device composed of a light transmitting medium containing a rare earth element, comprising a portion thereof doped with 1.times.10.sup.23 per 1 m.sup.3 or more of the rare earth element for inverting an optical signal and a portion thereof doped with 1.times.10.sup.21 per 1 m.sup.3 or more of the rare earth element for amplifying the optical signal with an excitation light superposed thereto.
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