The fabrication techniques of the invention may be used to produce optical couplers, gratings, and other multilayer devices of arbitrary shape for {TAIL ~ use} with {HEAD ~ optical systems}, in integrated circuit systems, and the like, where multilayered structures are needed 
The fabrication techniques of the invention may be used to produce optical couplers , gratings , and other multilayer devices of arbitrary shape for { TAIL ~ use } with { HEAD ~ optical systems } , in integrated circuit systems , and the like , where multilayered structures are needed
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