This article takes a closer look at Fabrinet ($FN) and Ciena ($CIEN), two companies that receive less attention than some of their peers in optics, but that I believe have significant potential. Their business models are very different, yet both have exposure to the same opportunity, scale-across. That connection makes them particularly interesting to examine together. The question is how each company can translate that opportunity into growth, and what investors need to understand about their respective strengths and limitations. For this piece, I partnered with Aurelion Research to pair an engineering perspective on optics with investment research grounded in detailed company analysis and conversations with management.