Patent ID: 8260142
Filing Date: 2012-09-04
Classification: H04Q

Abstract:
1. An apparatus for processing an optical signal, Comprising: a plurality of delay paths comprising delay elements for affording, delays to optical signals traversing therethrough, respectively; and a passive optical device for passively routing a plurality of optical signals input thereto to a first one of the delay paths simultaneously through an output thereof based at least on different wavelengths of the plurality of optical signals, the plurality of optical signals being returnable to the passive optical device through the first delay path to be rerouted by the passive optical device to a second one of the delay paths, wherein a total delay affordable to the plurality of optical signals is a function of at least a first delay afforded by a delay element in the first delay path, and a second delay afforded by a delay element in the second delay path, and wherein the respective wavelengths of the plurality of optical signals from the output of the passive optical device are unchanged when the plurality of optical signals travel from the first delay path to the second delay path.