US 12,231,832 B2
Method for pre-calculating and applying optimized phase patterns to LCoS switch panel of WSS module
Alan A. Fennema, San Jose, CA (US); Haijun Yuan, Dublin, CA (US); Wilfredo C. Nanita, Broken Arrow, OK (US); Oswald Correya, Melbourne (AU); Jack R Kelly, Lake Mary, FL (US); and Thomas J. Schwartz, Scotts Valley, CA (US)
Assigned to II-VI DELAWARE, INC., Wilmington, DE (US)
Filed by II-VI Delaware, Inc., Wilmington, DE (US)
Filed on Aug. 25, 2022, as Appl. No. 17/822,306.
Prior Publication US 2024/0073566 A1, Feb. 29, 2024
Int. Cl. H04Q 11/00 (2006.01); G02B 5/32 (2006.01)
CPC H04Q 11/0003 (2013.01) [G02B 5/32 (2013.01); H04Q 2011/0028 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus for processing an input beam, the apparatus comprising:
a plurality of ports being separated by port spacing, at least one of the ports being configured to transmit the input beam;
a dispersion element arranged in optical communication with the input beam from the at least one port and configured to disperse the input beam into optical channels;
a switch assembly arranged in optical communication with the optical channels from the dispersion element, the switch assembly being liquid crystal based and having a plurality of pixels, the pixels being individually addressable; and
control circuitry arranged in operational communication with the switch assembly, the control circuitry storing a plurality of holograms, each of the holograms associated with a defined parameter, each of the holograms configured to create a reconfigurable phase grating profile of the pixels of the switch assembly, each of the reconfigurable phase grating profiles being configured to selectively direct a portion of one or more diffracted beams of one or more of the optical channels from the switch assembly relative to one or more of the ports, the control circuitry being configured to select at least one of the holograms based on the defined parameter and being configured to control the switch assembly based on the at least one selected hologram;
wherein the defined parameter is selected from the group consisting of a targeted attenuation level for the optical channels, a wavelength range for the optical channels, a geometric alignment of the ports of the apparatus, a steering gradient, and an operating temperature of the apparatus.