GUOSHENG SECURITIES(SZ:002670) 智通财经网·2025-12-07 09:17Core Viewpoint - The global optical module industry is transitioning to 800G/1.6T, with optical isolators becoming a critical component due to a global shortage of the core material, Faraday rotators, which constrains production capacity [1][5]. Group 1: Optical Isolators - Optical isolators are essential components in high-speed optical modules, functioning as "optical one-way valves" to prevent back reflections that could harm laser sources and enhance system stability [2][3]. - The production of Faraday rotators, which constitute about 50% of the cost of optical isolators, is highly concentrated among a few manufacturers in the U.S. and Japan, creating significant technical barriers [3][4]. Group 2: Supply and Demand Dynamics - The demand for optical isolators is surging as major overseas companies transition to 800G/1.6T optical modules, with the quantity of isolators required increasing in line with the number of optical channels [4][5]. - The rapid growth in demand for optical modules is not matched by the supply of Faraday rotators, leading to a significant supply-demand mismatch and highlighting the value of optical isolators in the market [4][5]. Group 3: Investment Opportunities - Companies positioned in the optical isolator market, such as Dongtian Micro (301183.SZ), Fuzhijun Technology (002222.SZ), and Tianfu Communication (300394.SZ), are expected to benefit from their scarcity, sufficient production capacity, and technical barriers [5]. - The report recommends focusing on the computing power sector and related companies in the optical module industry, including leading firms like Zhongji Xuchuang (300308.SZ) and Xinyi Sheng (300502.SZ), as well as domestic supply chain participants [5].