光通信：拾级而上

Investment Rating - The report maintains a "Buy" rating for key companies in the optical communication sector, including Zhongji Xuchuang, Xinyi Sheng, and Tianfu Communication [10]. Core Viewpoints - The optical communication industry is transitioning from 800G to 1.6T technology, with a slight dip in performance in Q3 being a normal part of the technology upgrade and product ramp-up process. The industry is expected to enter a new growth cycle as the market improves in Q4 [20][21][24]. - The Q3 performance was relatively flat due to the transition phase, with leading companies like Xinyi Sheng and Tianfu Communication experiencing slight revenue declines. However, Zhongji Xuchuang maintained steady growth [21][22]. - The demand for 1.6T products is increasing, with major overseas computing companies starting to deploy and order these products, indicating a positive outlook for Q4 and beyond [21][24]. Summary by Sections Investment Strategy - The report recommends focusing on the computing sector, particularly optical communication leaders like Zhongji Xuchuang and Xinyi Sheng, as well as smaller firms in the optical device space [25][14]. Market Performance - The optical communication sector saw a decline of 5.8% in the recent week, underperforming compared to other sectors, while satellite communication showed relative strength [19][16]. Industry Trends - The optical communication industry is in a critical phase of upgrading from 800G to 1.6T technology, with expectations of increased demand and production in the coming years [20][24]. - The supply chain for optical devices is tightening, with core chip shortages impacting the industry. However, leading companies are expanding their production capabilities to meet rising demand [24][7]. Client Dynamics - Different overseas computing companies have varying order rhythms, affecting the quarterly performance of upstream suppliers. This variability is not indicative of a downturn in industry sentiment but rather reflects client-specific ordering patterns [22][3]. Future Outlook - The report anticipates a gradual recovery in industry sentiment starting in Q4, with significant growth expected in 2026-2027 as demand for 1.6T products scales up [21][24].