Major Breakthrough | Changguang Huaxin Receives Authorization for Three International Invention Patents

On January 30th, the first day of Changguang Huaxin's operation, it received notifications for three international invention patent authorizations, two from the United States Patent Office and one from the Japan Patent Office, marking a good start for Changguang Huaxin's overseas intellectual property layout and building core technological competitiveness. Changguang Huaxin has robustly embarked on a new journey of globalization.

PCT is an international treaty with over 155 contracting states and is one of the main channels for applying for foreign patents, requiring a series of strict examinations on technical novelty, inventiveness, and practicality before authorization can be granted, making it highly valuable. Through the World Intellectual Property Organization, the number of international patent applications submitted under the PCT system is one of the indicators widely used to measure global innovation activities. (Changguang Huaxin has applied for 12 PCT international patents, of which 3 have been authorized in the United States and Japan) 。

01 

A Multi-Active-Region Cascaded Semiconductor Laser

Multi-Active-Region Cascaded Semiconductor Laser

▲ Authorized by the United States Patent Office

In the field of LiDAR chips, the patent authorized by the United States Patent Office "A Multi-Active-Region Cascaded Semiconductor Laser" increases the number of active regions in the periodic gain structure, improving the internal quantum efficiency of the device , and at the same time reduces the carrier density , thereby achieving more gain . The barrier layer connection does not have pn junction characteristics, so this layer does not increase the device's operating turn-on voltage, and epitaxial growth is simpler than tunnel junctions. This patent represents a new structural design for LiDAR chips, breaking the patent restrictions on foreign LiDAR chip structures. Based on this patented technology, Changguang Huaxin's VCSEL array achieved a maximum efficiency of 60%, breaking the then highest record for photoelectric conversion efficiency. 。

This patent achievement was authorized in China in 2021 and then applied for in the United States, with reports presented at the global optics event Photonics West in 2021 and 2022. Changguang Huaxin has consistently adhered to an independent innovation technology path in LiDAR chips, securing multiple core international patents around the LiDAR VCSEL chip technology route. A High-Power Semiconductor Chip and Its Preparation Method Multiple core patents for the VCSEL chip technology route have been internationally protected.

 02

▲ Authorized by the Japan Patent Office

In the field of high-power semiconductor laser chips,

the patent authorized by the Japan Patent Office

"A High-Power Semiconductor Chip and Its Preparation Method" increases the propagation loss of higher-order lateral optical modes in the waveguide by setting lateral grating layers inside the waveguide, achieving suppression of higher-order lateral mode lasing; by setting multiple groups of gratings with different periods, it suppresses intensity oscillation modes caused by single grating gain modulation and refractive index modulation, thereby suppressing lateral optical intensity periodic oscillations, eliminating far-field double peaks, reducing the lateral divergence angle of the laser, and not affecting lower-order modes, improving chip brightness. Based on this patented technology, Changguang Huaxin's chip brightness reached 100 MW/ cm sr, at an internationally leading level. ² A Beam Combining Device and Beam Combining Method for Bragg Grating External-Cavity Laser Module Beam Combining Device and Beam Combining Method for Bragg Grating External-Cavity Laser

 03

In the field of fiber-coupled modules,

the patent authorized by the United States Patent Office

▲ Authorized by the United States Patent Office

"A Beam Combining Device and Beam Combining Method for Bragg Grating External-Cavity Laser Module" effectively solves the problem of power loss and degradation of combined output beam quality caused by wavelength locking deviations due to different beam directivities of various emitting modules in external cavity grating spectral beam combining by detecting and judging to form a closed-loop feedback. The combining device has a simple structure, fast detection and judgment, and convenient adjustment. Invention patents directly reflect a company's hard strength in scientific research and innovation. In recent years, through a series of measures such as R&D technological innovation and strengthening patent layout,

Changguang Huaxin's intellectual property work has achieved remarkable results, with more than 130 authorized patents to date, including over 80 invention patents, successfully passing intellectual property management system certification, with simultaneous improvement in patent quantity and quality. In the 2022 ranking of effective invention patents among 488 Sci-Tech Innovation Board listed companies in China, Changguang Huaxin ranked 115th. International invention patent authorization means the company's corresponding technology has been internationally recognized, and Changguang Huaxin's innovation and competitiveness in the laser chip field have reached an internationally advanced level. Focusing on innovation-driven leadership, enhancing scientific research and problem-solving capabilities. In the future, Changguang Huaxin will continue to empower the laser industry with innovation capabilities, focus on tackling key core technologies, build a high-end talent team, strengthen intellectual property protection and achievement transformation work, and help China's laser industry develop rapidly. Chinese laser chips, illuminating a better life. 顺利通过知识产权管理体系认证，专利数量和质量同步提升，在2022年中国488家科创板上市企业有效发明专利排行榜中，长光华芯位居第115位。国际发明专利授权意味着公司的相应技术得到了国际认可，长光华芯在激光芯片领域的创新力和竞争力已达国际先进水平。

聚焦创新驱动引领，增强科研攻关能力。未来，长光华芯将继续用创新能力为激光产业赋能，专注关键核心技术攻关，建设高端人才队伍，强化知识产权保护和成果转化工作，助力中国激光产业高速发展。中国激光芯，光耀美好生活。