Double diffraction grating with flat passband output
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United States of America Patent
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Dec 12, 2006
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N/A
app pub date -
Jun 1, 2005
filing date -
Mar 24, 2004
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Expired
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Abstract
The invention relates to a double-grating subtractive-dispersion optical channel multiplexer/demultiplexer for combining or separating optical channels and providing the output channels with a flat-top response. The FSR of the first grating is substantially equal to the channel spacing of the optical channels, such that the emission from the first grating achieves a cyclic offset of incidence angle into the second grating of the system.
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