Core Viewpoint - The report by Liu Muye from Zhonghang Securities highlights the rapid growth of Guangku Technology and its promising lithium niobate business, initiating coverage with a "buy" rating [1]. Company Overview - Guangku Technology is a national high-tech enterprise specializing in fiber optic devices and chip integration, covering the entire chain from basic components to high-end chips [2]. - The company's products are widely used in key areas of the fiber laser, fiber communication, and data center industries, successfully penetrating global markets and exporting to over 40 countries [2]. Financial Performance - In the first half of 2025, the company achieved revenue of 597 million yuan, a year-on-year growth of 41.58%, and a net profit attributable to shareholders of 52 million yuan, up 70.96% year-on-year [3]. - For Q2 2025, the company reported revenue of 331 million yuan, reflecting a year-on-year growth of 26.89% and a quarter-on-quarter growth of 24.96%, with a net profit of 41 million yuan, marking a year-on-year increase of 72.04% and a quarter-on-quarter increase of 278.29% [3]. Growth Drivers - The company's optical communication segment is a key growth driver, with revenue from optical communication devices reaching 280 million yuan in the first half of 2025, a year-on-year increase of 73.89% [4]. - The lithium niobate technology is positioned as a critical material for breaking through optical communication speed bottlenecks, with various high-speed modulators and chips being developed for applications in advanced communication networks [5]. Market Position and Strategy - Guangku Technology holds a leading position in the optical communication device sector, leveraging its technology in polarization-maintaining fiber devices and high-reliability components [4]. - The company is expected to benefit from the AI computing infrastructure and upgrades in optical modules, with projections for revenue growth to 1.432 billion yuan, 1.864 billion yuan, and 2.319 billion yuan from 2025 to 2027 [7]. Investment Outlook - The company is anticipated to gain from the commercialization of 1.6T optical modules and potential synergies from industry chain acquisitions [7].

磁光材料是一类在磁场作用下能够改变光传播特性的功能材料，典型表现为法拉第效应（ Faraday Effect ），即光的偏振方向沿传播方向发生旋 转。它们广泛应用于光隔离器、光环形器、磁光调制器等非互易光学器件中，是光通信、激光系统、量子信息等领域不可或缺的关键材料。常见 磁光材料包括掺铋石榴石（ Bi:YIG ）、铽镓石榴石（ TGG ）、铋锗氧化物玻璃等，具有高 Verdet 常数、低光学损耗和良好热稳定性等性能。 磁光材料行业发展主要特点 技术壁垒高 磁光材料涉及复杂的晶体生长与薄膜制备技术，对材料纯度、结构均匀性和磁光性能要求极高，研发周期长，技术积累深厚，形成较 高进入门槛。 磁光材料是一类能够在磁场作用下改变光的传播特性，尤其是光的偏振状态的功能材料。它们通常表现出法拉第效应（ Faraday Effect ），即当光 线通过磁光材料时，其偏振平面会沿传播方向发生旋转。磁光材料广泛应用于光隔离器、光环形器等非互易光学器件中，起到防止光信号反射干 扰和实现光信号单向传输的重要作用，是光通信、激光系统和量子信息技术中的关键材料。典型磁光材料包括掺铋石榴石（ Bi:YIG ）、铽镓石 榴石（ TGG ） ...

Core Viewpoint - Magnetic optical materials are essential for optical devices, enabling unidirectional light transmission and preventing signal interference, with applications in optical communication, laser systems, and quantum information technology [1][2]. Group 1: Market Overview - The global market for magnetic optical materials is projected to grow from approximately $0.99 million in 2024 to $1.75 million by 2031, with a compound annual growth rate (CAGR) of 8.50% from 2025 to 2031 [3]. - The market is dominated by companies from the United States and Japan, with the top two companies expected to hold about 87% of the market share by revenue in 2024 [5]. Group 2: Product Types and Applications - Magnetic optical materials are categorized into TGG, RIG, and others, with RIG expected to have a larger market share. By 2031, TGG and RIG are projected to account for approximately 66.93% and 26.83% of the market share, respectively [10]. - The communication sector is the leading application area, anticipated to represent 64.06% of the market share in 2024 [12]. Group 3: Research and Development Trends - Current research in magnetic optical materials is focused on enhancing performance, integration, and expanding functionalities, with ongoing optimization of traditional materials like TGG and Bi:YIG [2]. - New material systems such as topological insulators and two-dimensional magnetic materials are being explored to achieve stronger non-reciprocal effects and device miniaturization [2].

Group 1: Company Overview and Business Development - Dongtian Micro currently does not produce Faraday rotation plates but procures them for optical isolator production [1] - In 2024, the company's optical communication business achieved revenue of 1.24 billion yuan, a year-on-year growth of 101.65% [1] - The company aims to strengthen its existing business while seizing opportunities in the data communication market, focusing on the delivery of optical isolators and the development of new products like z-blocks and optical components [1] Group 2: Market Trends and Product Outlook - The global smartphone shipment in 2024 is projected to reach 1.24 billion units, a year-on-year increase of 6.4%, with China's market expected to see shipments of approximately 400 million units, growing by 2.86% [2] - The demand for high-speed optical modules, particularly 800G and 1.6T products, is expected to rise due to increasing AI computing power, driving the need for optical components [2] - The market for smartphone micro-prisms is significant, with high unit value and low current penetration, indicating substantial growth potential [2] Group 3: Technological Advancements - The spin-coating filter technology offers high absorption rates in the near-infrared spectrum, significantly improving image quality for high-end smartphone cameras [2]

Group 1: Business Overview - The company has been a major supplier of spin-coated optical filters in the domestic market since achieving mass production in 2022, contributing significantly to performance growth [1] - The spin-coated optical filter market has substantial growth potential due to low penetration rates and the trend of smartphone imaging upgrades [1] Group 2: Market Demand for Optical Filters - Demand for ordinary infrared cutoff filters continues to grow, driven by the overall increase in smartphone shipments and the rising penetration of multi-camera solutions [2] - The company has seen year-on-year growth in shipments of ordinary infrared cutoff filters in 2024 and Q1 2025, benefiting from increased downstream market demand and industry consolidation [2] Group 3: Product Development and Market Opportunities - The company is focusing on the mobile micro-prism market, which presents significant growth opportunities due to high unit value and low market penetration [3] - The company has established a product line for optical isolators, which are essential components for high-speed optical modules, and is experiencing strong market demand driven by the expansion of AI and data centers [3][4] Group 4: Production Capacity and Expansion Plans - The company is currently operating at a high capacity utilization rate and is expanding production at its Nanchang facility based on order demand [5]