Germanium

Ytterbium‑doped fiber serves as the core energy‑conversion component inside a fiber laser. Pump light emitted by laser diodes is coupled into the gain fiber, and energy is transferred to signal laser beams via ytterbium ion energy‑level transition for power amplification. Two dominant pump wavelengths, 915 nm and 976 nm, have been widely adopted over decades. With the rapid progress of pump chip and wavelength‑locking technology, 976 nm edge‑emitting laser (EEL) pumps have gradually surpassed the 915 nm route and become the new industry mainstream. Shenzhen Lemon Photonics Technology Co., Ltd keeps developing high‑performance pump chips for fiber laser manufacturers.

Founded in Beijing in 2011, Beijing FJR Opto-electronic Technology Co., Ltd. specializes in R&D, manufacturing and sales of infrared thermal imaging equipment and complete optoelectronic systems.

Recently, our R&D crew carried‑out performance tests on domestically‑made third‑party LiDAR hardware. The original built‑in sensor chip was replaced by Optics‑Valley Quantum’s new‑generation D‑XXLA200‑02 chip.

On January 21, 2026, SPIE Photonics West, one of the world’s leading photonics events, was held in San Francisco, USA. RaySea presented its latest self‑developed VCSEL achievements at this prestigious exhibition. Dr. Lai, the company’s senior R&D representative, delivered a technical speech during the dedicated VCSEL session. His presentation covered cutting‑edge progress of in‑house multi‑junction VCSEL solutions built for automotive lidar and embodied‑intelligence robots, drawing strong attention from the global photonics community.