2025 Happy New Year

The research team of Professor Wang Jun from the School of Electronic Information of Sichuan University and Suzhou Everbright Photonics Co., Ltd. proposed a method to expand the longitudinal gain based on multi-junction VCSEL to increase the power of single-mode VCSEL, and constructed a multi-junction VCSEL The mode analysis model solves the problem that the single-mode power is difficult to break through the level of about 10 mW. Under DC drive, a single-base transverse mode laser output of 20.2 mW is achieved, with a power conversion efficiency of 42% and a divergence angle of 9.8° (1/ e 2 ) and 5.1° (FWHM). This is the highest single-mode power of a single VCSEL to date, and its power value is nearly twice the existing single-mode power record.

On September 20, 2024, the Everbright Advanced Compound Semiconductor Photonics Platform project was officially topped out. The ceremony was attended by Ming Dayong, Chairman and General Manager of Everbright, along with other company executives and representatives from Zhongshe Construction Group.

2024 Paris Olympics，Everbright cheer for the athletes

Fiber-coupled diode modules have various applications in material processing and fiber laser pumping because of their high efficiency and high reliability. Commercial fiber-coupled diode modules using spatial beam combining and polarization beam combining cannot be employed in high-brightness applications, for example metal cutting, which demands a laser power exceeding 1 kW with a BPP of a few mm*mrad. Dense wavelength beam combining (DWBC) technology showed the possibility of further scaling-up the output power of fiber-coupled diode modules while maintaining the same beam quality that allows for fiber-coupled diode modules to be used in high-brightness applications. The efficiency, reliability, and brightness of fiber-coupled diode modules can be improved by using single emitters instead of laser diode bars as power sources in DWBC. Two types of high-brightness 100 µm/0.22 NA 2 kW fiber-coupled diode modules employing single-emitter-based DWBC technology, which have a wavelength range from 953 to 991 nm with 50% efficiency and a narrower wavelength range with 48% efficiency respectively, were developed for material processing and Raman fiber amplifier pumping. Furthermore, we combined 15 high-brightness 100 µm/0.22 NA 1.4 kW fiber-coupled diode modules into a 600 µm/0.22 NA fiber, achieving more than 22 kW at the output.

In this paper, we present the latest progress on 6" wafer production line at Everbright Photonics Co. Ltd., which produces multi-million chips per month for fiber laser pumping. The uniformity and reproducibility of epitaxial and fabricated 6" wafers will be detailly presented. High power laser device’s performance will also be reported.