中国物理B ›› 2007, Vol. 16 ›› Issue (4): 1031-1037.doi: 10.1088/1009-1963/16/4/028

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Analysis of the far spatial coherent suppressed single peak field distribution of a rectangular wave-guide laser

吴行飞, 杨静, 辛建国   

  1. Department of Optical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2006-06-09 修回日期:2006-10-27 出版日期:2007-04-20 发布日期:2007-04-20

Analysis of the far spatial coherent suppressed single peak field distribution of a rectangular wave-guide laser

Wu Xing-Fei(吴行飞)†, Yang Jing(杨静), and Xin Jian-Guo(辛建国)   

  1. Department of Optical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2006-06-09 Revised:2006-10-27 Online:2007-04-20 Published:2007-04-20

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摘要： A theory of the far spatial coherent-suppressed single-peak field distribution of a rectangular wave-guide CO2 laser is presented. The theoretical analysis shows that a rectangular wave-guide laser can have an output intensity distribution in far field similar to that produced from a wave-guide array laser, which is in agreement with the experimental result. A single-peak mode output is obtained within 5 metres. The experimental far-field spread angle in the bigger-Fresnel number direction is 0.63 mrad, compared to the calculated one, 0.6 mrad, and when the length of the laser resonator is changed, a double-peak or multi-peak in far-field distribution of the laser is obtained.

Abstract: A theory of the far spatial coherent-suppressed single-peak field distribution of a rectangular wave-guide CO2 laser is presented. The theoretical analysis shows that a rectangular wave-guide laser can have an output intensity distribution in far field similar to that produced from a wave-guide array laser, which is in agreement with the experimental result. A single-peak mode output is obtained within 5 metres. The experimental far-field spread angle in the bigger-Fresnel number direction is 0.63 mrad, compared to the calculated one, 0.6 mrad, and when the length of the laser resonator is changed, a double-peak or multi-peak in far-field distribution of the laser is obtained.

Key words: wave-guide array, CO2 laser, field distribution

中图分类号:  (Gas lasers including excimer and metal-vapor lasers)

  • 42.55.Lt
42.60.By (Design of specific laser systems) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.82.Et (Waveguides, couplers, and arrays) 42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)