Application of Neodymium Ion Concentration Gradient YAG Crystal in End-Pumped Laser Technology

The rapid development of laser technology is inseparable from the substantial improvement of semiconductor lasers, artificial crystal materials and devices. At present, the field of semiconductor and solid-state laser technology is flourishing. In order to further understand the cutting-edge scientific research status and national defense security application needs of high-power semiconductor and solid-state laser technology, and promote academic exchanges in upstream and downstream of laser technology, the Chinese Society of Optical Engineering will hold the “Advanced Semiconductor, Solid-State Laser Technology and Application Exchange Conference” in 2024 to conduct in-depth exchanges on the physical principles, key technologies, application progress, and future prospects related to semiconductors and solid-state lasers.

At this meeting, our company chairman, Zhang Jianjun, reported on the application of neodymium ion concentration gradient YAG crystal in end-pump laser technology.Solid-state lasers are generally optically pumped, and there are two main types of pumping methods: lamp pump and diode pump. Diode-pumped solid-state lasers (DPSSL) have the advantages of high efficiency, high beam quality, good stability, compact structure, and long life. Diode pumping is used in Nd:YAG lasers in two pumping forms: side pumping (referred to as side pumping) and end pumping (referred to as end pumping).

Compared with lamp pumping and semiconductor side pumping, semiconductor end pumping is easier to achieve mode matching between pumping light and oscillating light in the laser cavity. Moreover, focusing the pump beam to a size slightly smaller than the laser rod can limit the number of modes in the cavity and effectively improve the beam quality. At the same time, it has the advantages of compact structure, low laser threshold, and high efficiency. Studies have shown that end pumping is currently the most efficient pumping method.




Post time: Jun-21-2024