Double-passage acousto-optical device and laser
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United States of America Patent
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Apr 9, 2002
Grant Date -
N/A
app pub date -
Sep 28, 1999
filing date -
Sep 29, 1998
priority date (Note) -
Expired
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Abstract
A double-passage acousto-optical device including an acousto-optical switch having a first polarization conversion region connected between first input and output ports, and a second conversion region connected between second input and output ports; and an optical combination connected between the first output port and the second input port via optical fibers and including an optical isolating element. The double-passage acousto-optical device may alternately include an acousto-optical switch including a single polarization conversion region connected between first input and output ports and also connected between second input and output ports. A bandpass filter, a notch filter, and add/drop and a tunable laser generator may be formed using the acousto-optical device.
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