A method for fabricating a multi-layer laterally-confined dispersion-engineered optical waveguide which may include one multi-layer reflector stack for guiding an optical mode along a surface thereof, or may include two multi-layer reflector stacks with a core therebetween for guiding an optical mode along the core. According to the present invention, the sense amplifier comprises a second active branch connected to the read node, comprising means for supplying, at the read node, a current that is added to the current supplied by the first active branch, such that the voltage representative of the conductivity state of the memory cell remains substantially stable upon a current draw at the read node. A subset of products of the plurality of products is designated, where the number of products in the subset of products is less than the number of products in the plurality of products. The print server receives the configuration information of the printing apparatus transmitted from the client terminal via the registration web page transmitted to the client terminal. The lens may include a lens body having a convex top surface having a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface having a second recessed part at a central portion thereof, and a plurality of lens supports on the bottom surface of the lens body.