Wavelength-selective switch
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United States of America Patent
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Oct 5, 2010
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app pub date -
May 30, 2008
filing date -
Jun 18, 2007
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Abstract
A wavelength-selective switch with a switch unit having a lens array, a first lens and a beam expander, and a branching unit having a second lens, a diffraction grating, a third lens and a mirror, in which the switch unit and the branching unit are accommodated in independent casings, and a confocal point of the light transmitted through the first lens and the light transmitted through the second lens are arranged on a connecting surface of the casing of the switch unit and the casing of the branching unit.
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