Chinese Academy of Sciences

Liyuan Jiang

Jun Zhou

Haibo Zhang

Zhijun Yuan

Liming Geng

Yunrong Wei

Prism beam expansion system which having two or more right angle prisms with the same structure. The incident light beam enters via an incident inclined plane and exits as an exit light beam that is perpendicular to an exit right angle plane of the same right angle prism. The vertex angle &#x3b1; of all the right angle prisms are the same and satisfies the expression where n1 and n2 represent the refractive indexes of the laser beam respectively in the incident media and in the right angle prism.

Prism beam expansion system

An apparatus and method for adjusting prism beam expander. The prism beam expander adjustment apparatus has a light source, a baseplate, a precise rotary stage, support columns, a two-dimensional slide stage, the first 90-degree bellcrank lever, an indication light source, the second 90-degree bellcrank lever, an optical filter, a photodetector, a computer, and an assembly platform. Incidence angles of all prisms of a prism beam expander can be precisely demarcated and designed beam magnification is obtained with the preferred adjustment methods. The parallel of the prisms can be guaranteed by monitoring the pitching of the prisms in the adjustment process. As a result, the linewidth narrowing and cavity losses decreasing can be improved by application of the fixed prism beam expander.

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Shanghai, China

Liyuan Jiang