A Mux/Demux subassembly includes a stamped optical bench, which includes an array of stamped reflective surfaces for redirecting optical signals. Alignment features and components of the Mux/Demux subassembly are integrally formed on a stamped optical bench, defining a desired optical path with optical alignment at tight tolerances. The optical bench is formed by stamping a malleable stock material (e.g., a metal stock), to form precise geometries and features of the optical bench.