掺稀土光纤，顾名思义指在特种光纤纤芯中精准掺入镱、铒、铥等稀土离子，用以产生特定波长激光和放大光信号，比如让激光 拥有"削铁如泥"的精准切割、焊接能力，或者实现长距离、大容量、高速率的光信号无衰减传输，支撑全球互联网通信。 但我国高性能掺稀土光纤市场却长期受制于海外巨头，直到近年来才在国内企业的不懈攻坚下逐步打破垄断， 武汉长进光子技术 股份有限公司 （以下简称"长进光子"）便是其中的核心突破者之一。公司在掺镱光纤、掺铒光纤等领域实现了自主研发和批量供 应，成功突破美国《商业管制清单》对我国部分高性能特种光纤的技术封锁与贸易禁运。3月27日，长进光子即将在科创板上 会，迎来资本市场的关键检验。 硬核研发团队领衔，攻克海外技术封锁 1985 年，英国南安普顿大学借助改进的化学气相沉积法（MCVD）成功研制出低损耗掺铒光纤，这一技术突破彻底重塑了光通信 行业的发展格局：光信号无需光电转换即可直接"接力"传输，传输距离从百公里级跃升至数千公里，通信容量更是实现百倍提 升。该团队负责人Payne爵士表示，"这就像给光纤通信装上了'心脏起搏器'，让全球互联网的基础架构得以成型。" 正因掺稀土光纤的核心战略地位，其成为美 ...

Fundraising - The company plans to raise funds for the construction of a high-performance specialty optical fiber production base and R&D center, as well as to supplement working capital [1][13] - The estimated investment scale for the production base and R&D center is 70 million, with 68 million expected to be funded from the raised capital [2][14] - An additional 10 million is allocated for working capital, bringing the total estimated investment to 80 million and the total expected raised funds to 78 million [2][14] Company Overview - Wuhan Changjin Photon Technology Co., Ltd. was established in 2012 and is a leading manufacturer of specialty optical fibers in China, focusing on high-performance and multi-category optical fiber R&D and industrialization [1][16] - The company's main product, rare-earth-doped optical fiber, is a crucial optical material in the laser industry chain and is widely used in advanced manufacturing, optical communication, measurement and sensing, national defense, healthcare, and scientific research [1][16] Revenue and Growth - The company's main business revenue for the reporting periods was 108 million, 145 million, 192 million, and 179 million, with a compound annual growth rate of 33.07% from 2022 to 2024, indicating a strong growth trend [5][16] - The gross profit margins for the main business were 66.37%, 69.31%, 69.13%, and 62.50%, maintaining a high level [5][16] - R&D expense ratios were 16.50%, 15.08%, 14.71%, and 14.17%, reflecting a consistent commitment to R&D investment [5][16] Product Applications - The company has achieved mass production and sales of Yb-doped fibers and high-power Yb-doped fibers above 6kW, with performance indicators on par with international standards, serving major laser manufacturers [4][17] - In optical communication, the company produces ultra-broadband L-band erbium-doped fibers with a wavelength of 1627nm, contributing to the large-scale commercialization of 400G optical transmission networks [4][17] - The company has established partnerships with major domestic laser radar source manufacturers for its erbium-doped Yb fibers, meeting diverse needs in measurement and sensing [4][17] - In the national defense sector, the company supplies enhanced-function rare-earth-doped fibers to military research institutes, contributing to national security [4][17] Employee Structure - As of the end of the reporting period, the total number of employees was 242, with 61.57% in production, 19.42% in R&D, 12.81% in management, and 6.20% in sales [7][21] - The age distribution of employees shows that 58.68% are under 30 years old, 33.47% are between 30 and 40, and 7.85% are over 40 [9][22] - The educational background of employees includes 4.96% with a doctorate, 8.26% with a master's degree, 35.54% with a bachelor's degree, and 51.24% with a diploma or lower [10][23]