Frequency-shifting micro-mechanical optical modulator
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United States of America Patent
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Feb 22, 2011
Grant Date -
Oct 29, 2009
app pub date -
Feb 9, 2009
filing date -
Feb 8, 2008
priority date (Note) -
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Abstract
An apparatus for shifting the frequency of light comprises a modulator comprising one or more light-reflective elements. The elements are arranged in N groups that are interleaved along the surface of the modulator. The elements are deflected in time in a periodic sawtooth or sinusoidal N-phase manner. The frequency shift can be varied continuously and quickly. Such a modulator may be operated at zero frequency shift, to produce an optical phase shift.
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