Wavelength independent variable optical attenuator
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United States of America Patent
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Nov 21, 2000
Grant Date -
N/A
app pub date -
Jun 29, 1999
filing date -
Jun 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an optical attenuator having a pair of substantially parallel mirrors that attenuate an optical signal based, at least in part, on the rotation angle of the mirrors. When the pair or mirrors is in a predetermined position, an input optical signal is directed from an input port to an output port with a minimum insertion loss. As the pair of mirrors is rotated, the optical signal is shifted parallelly, which provides increased insertion loss and an attenuated signal at the output port. The pair of mirrors can be rotated, for example, with a stepper motor, or other device.
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