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提出将束转动90°环形非稳腔应用于片状陶瓷YAG激光器的设计。该设计采用两个薄片状YAG增益介质垂直放置形成屋脊镜,与另一屋脊镜共同构成光束旋转系统。采用快速傅里叶变换方法,计算了该腔的空腔模式分布。分析了该腔对抽运不均匀影响光束质量进行补偿的机理。并以片状增益介质侧面抽运不均匀为模型,计算比较了束转动90°环形非稳腔与常规腔的光场分布。说明束转动90°环形非稳腔应用于固体激光器,对抽运技术引起的不均匀增益平均化,改善了光束质量。为束转动90°环形非稳腔在固体激光器的应用提供依据。
It is proposed that the beam rotated 90 ° circularly unstable cavity should be used in the design of ceramic YAG lamellae. The design uses two lamellar YAG gain media vertically placed to form the roof mirror, and another house mirror together form a beam rotation system. The cavity mode distribution of the cavity was calculated by using the Fast Fourier Transform method. The mechanism of the cavity compensating for the uneven beam pumping quality is analyzed. The model is used to model the nonuniform pumping of flaky gain medium, and the light field distributions of circularly rotated 90 ° circular unstable cavity and conventional cavity are calculated and compared. Description The beam rotated 90 ° circularly unstable chamber for solid-state lasers, averaging uneven pumping gain and improving beam quality. It provides a basis for the application of solid beam laser to rotate 90 ° annular unstable cavity.