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Non-paraxial elliptical gaussian beam

Chinese Journal of Lasers 2001年第6期10卷 33-39页

作者： WANG Zhaoying LIN Qiang NI Jie (Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310028, China) 浙江大学物理系光学所浙江杭州 310028

By using the methods of Hertz vector and angular spectrum transormation, the exact solution of non-paraxial elliptical Gaussion beam with general astigmatism based on Maxwell′s equations is obtained. We discussed its propagation characteristics. The results show that the orientation of the elliptical beam spot changes continuously as the beam propagates through isotropic media. Splitting or coupling of beam spots may occur for different initial spot size. This is very different from that of paraxial elliptical gaussian beam.

关键词： non-paraxial elliptical gaussian beam propagation

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Miniature optical force levitation system

引用

Chinese Optics Letters 2022年第1期20卷 180-185页

作者： Junji Pu Kai Zeng Yulie Wu Dingbang Xiao College of Intelligent Sciences Department of Intelligent Machinery and InstrumentsNational University of Defense TechnologyChangsha 410073China

Optical levitation technology is a new levitation technology for trapping micro/*** taking advantage of the mechanical effect of light,it has the characteristics of non-contact and high ***,the traditional optical levitation system is large in volume,complex in adjustment,and greatly affected by the external ***,a miniature optical levitation system based on a laser diode,miniature lenses,and a micro-electro-mechanical system(MEMS) particles cavity is ***,we analyze the output spot characteristics of the laser *** compared the characteristics of different kinds of laser diodes,the type,wavelength,and power of diodes in the levitation system are ***,the micro-particles cavity is fabricated based on the MEMS *** MEMS process is widely used in the manufacturing of micro-electronic devices because of its advantages of small size,high precision,and easy mass *** particle cavity processed in this way can not only ensure the advantage of small volume,but also possesses high processing *** volume of the entire package including the light source,focusing lenses,and MEMS cavity is just Φ10 mm×33 mm,which is the smallest optical levitation system reported,to the best of our *** the entire levitation system is designed and set up,one silica particle of 10 μm diameter is stably trapped in the atmospheric ***,the micro-displacement and vibration signal are detected by a four-quadrant photoelectric detector to evaluate the stiffness of the optical levitation system.

关键词： optical levitation system laser diode elliptical gaussian beam quadrant photoelectric detector MEMS particles cavity

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