摘要
由于通常采用圆形孔径加工光学系统,故可将单横模输出的半导体激光器发出的椭圆高斯光束近似为圆高斯光束,提出了对半导体激光器出射光束用轴对称光学系统进行处理的方法。并通过计算有限孔径的高斯光束有效菲涅尔数,确定了只要选择合适的孔径和距离,可以将几何光学的一些方法引入到高斯光束的处理问题中。实验中用视频激光光束检测仪对准直后的光束进行了测试,通过计算得出准直后的发散角被很好地控制在1mrad以内,从而验证了理论的可行性及准直系统的实用价值。
An elliptical Gaussian beam, which is from single transverse mode semiconductor laser diodes, can be approximated dealt as circular beam because most elements of optical systems generally consist of circular aperture, like lens, illuminator, reflector, etc. By choosing both proper aperture and distance, the laws of reflection and refraction, ray tracing techniques, etc. from geometrical optics provide a foundation for design of laser beam controlling systems. Applications of these techniques to design an axis-symmetrical beam quality controlling systems are presented in this paper, and measurements with Photon 2 350 Beam Profiler are represented. The angle of divergence is corrected within 1mrad, thus the theories in this paper are proved to be applicable to beam quality controlling system.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第4期788-790,共3页
Journal of University of Electronic Science and Technology of China
关键词
发散角
准直
菲涅尔数
高斯光束
光通信
半导体激光器
angle of divergence
collimation
Fresnel number
optical communication
Gaussian beam
semiconductor laser
