Although the high-power UV laser output power to obtain a fast increase, but the development of high-power UV laser there are still some problems to be solved, this is the future industrialization of high-power UV laser technology and products of the major problems facing: 1) non- anti-linear optical crystal damage problems. With the UV laser power increases, the nonlinear optical crystal damage issue has become increasingly prominent. To solve this problem, on the one hand to improve the performance through the material itself, crystal processing and coating technologies to improve; the other hand, need to study the optical damage resistance of new technologies, such as the use of the nonlinear crystal fabric Justin output Special angle cut, both to achieve splitting, and can not coated to improve resistance to damage the ability of the crystal. 2) UV laser efficiency. The order of green laser pointer is getting more and more.
This involves the design of the overall structure of the laser, in order to get high efficiency solid-state UV laser, not only need to source the rational design of the structure of the fundamental frequency, get a high electro-optical efficiency, but also need to transform part of the increase in the frequency of the frequency conversion efficiency, which is the current face the main problem. As the frequency conversion efficiency and optical power density is proportional to, so the need to improve the optical power density in order to improve conversion efficiency, but with the crystal optical damage constitute a contradiction, a comprehensive consideration and compromise; In addition, the existence of non-linear crystal optical walk-off effect is the impact of non-linear conversion efficiency of the important factors. UV laser beam quality. The order ofgreen laser pointer has been set.
Improve the life of the current approach is to use crystal Co herence’s patented technology, by moving the crystal in the crystal to change the spot position, a point to work 500 h, by M × N (such as 8 ×) points to increase the life of 9 , but increases the complexity of the structure, while in the process of moving the crystal need to ensure positioning accuracy, may have to explore more effective ways to improve the life of the crystal. With the industry for high-power solid-state UV laser increase in demand, but also because of the continual emergence of new nonlinear materials and material properties of the continuous improvement of high-power solid-state UV laser output power has reached the level of the order of 100 W. The need ofgreen laser pointer is still large.
LD-pumped solid-state lasers with good beam quality, high stability, reliability, ease of use are occupying many α α Received Date: 2002210221 Fund: the National Natural Science Foundation (N o. 69678016) and 863 “” high-tech projects (N o. 2002AA 311140) Author: Gao Lan Lan (19752), female, Changchun Institute of Optics PhD. Mainly engaged in the LD-pumped all-solid single-frequency laser technologies. Tan Hui-ming (19542), male, researchers, doctoral tutor, Changchun Institute of Optics chief engineer of the new industry. Mainly engaged in the study of nonlinear optics. The green laser pointer company can meet the need of market.