CoAdna Photonics, Inc.
|CoAdna Photonics, Inc. Patent applications|
|Patent application number||Title||Published|
|20130120695||Tunable Flat-Top Liquid Crystal Optical Filter - An optical wavelength filter with flat-top pass-band and tunable center wavelength is presented. The filter uses birefringence wave plates, polarizers, and electrically controlled birefringent (ECB) liquid crystal cells. The filter employs a multistage structure which is composed of a cascade of filter units. Each stage includes two polarizers, two birefringent crystal wave plates and two ECB liquid crystal cells. The pair of the thinnest wave plates have a thickness of L, and the wave plates in the following stages have thicknesses of 2 L, 4 L, . . . , 2||05-16-2013|
|20110109869||RECONFIGURABLE WAVELENGTH SELECTIVE CROSS-CONNECT SWITCH USING LIQUID CRYSTAL CELLS - A reconfigurable optical cross-connect switch includes N input ports and M output ports, where N and M are integers with a value of two or more. The switch has a set of switching stages where each switching stage includes a polarization switch to receive an input linearly polarized optical beam. One or more birefringent prism pairs associated with the polarization switch directs the input linearly polarized optical beam to any of the M output ports through control of the polarization switch.||05-12-2011|