Disclosed are processes for preparing novel carbamate intermediates of paroxetine comprising dealkylating N-alkylparoxetine by reaction thereof with a haloalkyl ester of a haloformic acid, in a suitable organic solvent. Output ends of the optical waveguides of the set form a two-dimensional array capable of end-coupling the optical waveguides of the set to a multimode optical fiber in response to the array being located to optically face one end of the multimode optical waveguide. The central cavity and the plurality of outer cavities each have a LD ratio, wherein the LD ratio of the central cavity is less than the LD ratio of each of the outer cavities.