I need to place laser dies with sub‑micron accuracy, align lenses to the laser output, attach optical fiber with minimal signal loss, integrate wavelength‑multiplexing components, hermetically seal, manage thermal loads, and run final calibration across a battery of signal‑quality tests for a 1.6‑terabit module or co‑packaged optical engine. Independent research calls this the “boring but decisive” layer: as bandwidth rises, alignment precision and yield requirements rise non‑linearly, and at hyperscale volumes yield improvements compound.