The invention relates to an optical waveguide interferometer and a method for manufacturing same. The optical waveguide interferometer includes a first optical section, a second optical section, and aset of optical waveguides configured to connect the first and second optical sections, such that light propagating between the first optical section and the second optical section passes through eachoptical waveguide in the set, wherein the set of optical waveguides includes a first optical waveguide having a first length and a first width and a second optical waveguide having a second length and a second width, wherein the second length is greater than the first length, and the second width is greater than the first width.