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柱透镜被广泛运用于准直半导体激光光束,而普通圆柱透镜准直能力并不高,为了克服这一不足,提出一种新的柱透镜结构:双半圆柱透镜(DHCL);基于光线传输理论导出该结构柱透镜准直激光光束的基本公式并给出数值模拟的结果。理论分析和数值模拟均表明:在用于准直半导体激光器输出光束方面,双半圆柱透镜突破了普通圆柱透镜在最佳准直时对透镜材料折射率的限制,提高了结构设计和材料选择的灵活性;特别是在高折射率条件下,双半圆柱透镜对光束的准直能力远远超过了普通圆柱透镜。理论上可以将半导体激光光束快轴方向发散角压缩到0.1 mrad的量级。
Cylindrical lenses are widely used to collimate semiconductor laser beams, but ordinary cylindrical lens collimation ability is not high, in order to overcome this deficiency, a new cylindrical lens structure: double semi-cylindrical lens (DHCL); based on light transmission theory The basic formula of the collimating laser beam is deduced and the numerical simulation result is given. Both theoretical analysis and numerical simulation show that the double-semi-cylindrical lens breaks the refractive index limitation of ordinary cylindrical lens when it is used for collimating the output laser beam of the semiconductor laser and improves the structural design and material selection Flexibility; especially in the high refractive index conditions, the double semi-cylindrical lens collimation ability of the light far beyond the ordinary cylindrical lens. Theoretically, the divergence angle in the fast axis of the semiconductor laser beam can be reduced to the order of 0.1 mrad.