Summary of Key Points from Conference Call Records Industry Overview - The isolator market is facing supply-demand imbalances due to tight upstream material supplies, specifically Faraday rotators and polarizers, primarily controlled by overseas manufacturers such as Sumitomo, Coherent, Hoya, and Corning. This has led to price increases, creating opportunities for domestic manufacturers like Xinhua Guang and Fuzhijing [1][2][4] - Global infrastructure demand remains strong, but North America is experiencing shortages, impacting related supply chains. Space computing, as part of broader infrastructure, is expected to address ground energy shortages through commercial space technology [1][5][19] Key Insights and Arguments - The isolator is crucial in optical communication for ensuring unidirectional light transmission, with increasing demand and quality requirements, especially in North America [2] - The financial results of Broadcom and Oracle have caused market fluctuations, but the underlying demand remains strong. Concerns about AI demand and supply chain issues are significant [1][6][8] - The AI sector shows notable valuation disparities, with core AI stocks like TSMC and NVIDIA being relatively undervalued, while segments like power, fuel cells, and storage are overvalued [8] - NVIDIA's H200 offers significant cost-performance advantages, attracting major organizations like Alibaba and Tencent, and is pivotal in advancing AI technology [3][12][14] Market Dynamics - Broadcom's lack of a substantial upward revision in its 2026 guidance has led to market anxiety, despite strong financial performance. The stock dropped 10% post-earnings release due to concerns over AI demand and supply chain capabilities [6][7] - Oracle's recent financial performance raised concerns about cash flow and order fulfillment, particularly regarding its collaboration with OpenAI [9] Technological Developments - Companies are accelerating model iterations, with advancements like GPT-5.2 and Gemini 3.3 Pro showcasing different strengths in AI capabilities. NVIDIA maintains a competitive edge in computing power, although Google's TPU project has significant experience [10][11] - The light communication industry is thriving due to its high demand and favorable commercial landscape, with leading companies like Zhongji Xuchuang and Xinyi Sheng expanding their advantages in silicon photonics [17][18] Future Trends - Space computing is expected to grow significantly, driven by events like frequent rocket launches and the potential IPO of SpaceX, addressing energy supply issues through high-density solar energy [19][20][21] - Liquid cooling technology is gaining attention, with established companies maintaining dominance due to their experience and case studies, while new entrants face challenges in post-installation support and operational risks [22][23][24]

Investment Rating - The report maintains a "Buy" rating for key companies in the optical communication sector, including Zhongji Xuchuang, Xinyi Sheng, and Tianfu Communication [5][10]. Core Insights - The optical isolator is a critical passive device in optical communication systems, relying on the combination of polarizers and Faraday plates. There is a significant technological dependency and supply gap in the upstream manufacturing of these core components, particularly in high-end Faraday magnetic optical materials, which has become a bottleneck for industry development [1][19]. - The report highlights the low domestic production rate of core materials for polarizers, which are monopolized by Japanese and Korean suppliers, indicating a need for increased localization [3][21]. - The global shortage of Faraday plates is a critical issue, as their complex material growth and precision processing are dominated by a few companies in the US and Japan, leading to supply constraints that hinder the expansion of isolators and high-speed optical modules [4][22][23]. Summary by Sections Investment Strategy - The report suggests focusing on the upstream gaps in isolators, particularly polarizers and Faraday plates, and recommends companies like Zhongji Xuchuang, Xinyi Sheng, and Tianfu Communication for investment [8][24]. Market Review - The communication sector has seen an increase, with optical communication performing particularly well, as indicated by various indices showing significant growth [15][18]. Supply Chain Dynamics - In 2024, China's production capacity for polarizers is expected to account for approximately 73% of the global market, yet the localization rate of core materials remains below 10%, posing challenges to supply chain stability [6][7][24]. Key Companies to Watch - The report identifies several key companies to monitor within the optical communication and related sectors, including Zhongji Xuchuang, Xinyi Sheng, Tianfu Communication, and others involved in the supply chain [8][9][24].

Company Developments - Changfei Company will showcase its innovations in the fields of 5.5G, AI computing power, and green lighting at the 2025 "China Optics Valley" International Optoelectronic Exposition from May 15 to 17, 2025, under the theme "Light Leading a Green Future" [2] - In the 5.5G sector, Changfei has launched several innovative products, including the Farbei® ultra-low loss G.654.E optical fiber, which is ideal for long-distance data center transmission, and various flexible multimode fibers that meet diverse transmission needs [2] - The company also presented a full range of cable solutions, including indoor and outdoor cables, leakage cables, ODN, and submarine cables, ensuring excellent product quality through its advanced drawing technology [2] Breakthroughs in Special Optical Communication - Changfei has made significant breakthroughs in special optical communication and sensing products, introducing a polarizer that effectively blocks reverse transmission signals, enhancing the stability and security of optical communication systems [3] - The company showcased its "Panda" polarization-maintaining fiber and other star products, demonstrating its deep expertise and innovative capabilities in the special fiber sector [3] AI Green Computing Solutions - In response to the explosive growth of data driven by AI computing and reasoning, Changfei launched AI green computing solutions centered around hollow-core and multi-core fibers [3] - The hollow-core fiber, a disruptive technology for next-generation optical communication, achieves efficient signal transmission in air cores, with a speed increase of approximately 47% and a delay reduction of about 31% compared to conventional fibers [3] - At the recent OFC in March, the company demonstrated the latest advancements in hollow-core fiber technology, achieving a single fiber length exceeding 20 kilometers and a minimum attenuation coefficient of 0.05 dB/km, setting a new global record [3][4] Multi-Core Fiber Applications - The application of multi-core fibers has significantly increased transmission capacity to dozens of times that of conventional single-mode fibers, enhancing information transmission efficiency and reducing cable volume by over 75% [4] - Changfei also showcased 400G/800G high-speed optical modules and high-density integrated wiring products, effectively covering the optical interconnection needs of intelligent computing hubs from 7 meters to 2 kilometers [4] Green Lighting Innovations - In the green lighting sector, Changfei introduced an intelligent sunlight introduction system that uses specialized optical fiber lamps and lighting cables to bring outdoor natural light indoors, addressing the needs for green lighting, environmental health, energy conservation, and low-carbon living [4] - This system has been successfully applied in various locations, including Shanghai Hongqiao, Xiamen North Station, and residential villas [5]