Xuan Gu Bao·2025-08-28 15:06Group 1: Stock Performance - On August 28, optical communication concept stocks surged, with Changfei Fiber reaching the daily limit, and Tianfu Communication and Dekeli rising over 10% [1] - Changfei Fiber (601869.SS) closed at 82.95, up 10.00%, with a market cap of 33.706 billion [2] - Tianfu Communication (300394.SZ) closed at 169.99, up 13.32%, with a market cap of 131.887 billion [2] - Dekeli (688205.SS) closed at 113.50, up 12.37%, with a market cap of 17.965 billion [2] - Other notable stocks include Dongtianwei (301183.SZ) up 10.70% and Zhongji Xuchuang (300308.SZ) up 5.81% [2] Group 2: Industry Developments - Nvidia reported a significant increase in its network business, with an annualized revenue of approximately $29 billion, reflecting a 50% quarter-over-quarter growth and a 100% year-over-year growth [3] - The CFO of Nvidia projected that AI infrastructure spending could reach $3 trillion to $4 trillion by 2030, with potential H20 revenue of $2 billion to $5 billion in Q3 [3] - Nvidia introduced the new Spectrum-XGS Ethernet technology aimed at connecting multiple geographically dispersed data centers into a unified AI super factory [3] Group 3: Technological Advancements - Hollow-core fiber, which uses air as the guiding medium, can enhance data transmission speed by nearly 50% and extend transmission distance by 1.5 times without increasing latency [5] - The demand for optical fiber in data centers is accelerating due to AI-driven interconnect needs, with major companies like Microsoft investing in hollow-core fiber technology [5] - The global DCI market is expected to grow from $1 billion in 2023 to $3 billion by 2028, driven by the explosion of AI computing demand and energy constraints [5]