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.
Received: 09 June 2006
Revised: 27 October 2006
Accepted manuscript online:
PACS:
42.55.Lt
(Gas lasers including excimer and metal-vapor lasers)
(Resonators, cavities, amplifiers, arrays, and rings)
Cite this article:
Wu Xing-Fei(吴行飞), Yang Jing(杨静), and Xin Jian-Guo(辛建国) Analysis of the far spatial coherent suppressed single peak field distribution of a rectangular wave-guide laser 2007 Chinese Physics 16 1031
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