According to the basic diffraction theory of symmetric confocal cavity,the theory of self-reproducing mode of laser optical resonant cavity is analyzed,mathematical models of square mirrors resonator and circular mirror resonator for transverse mode spatial distribution are established.Numerical simulation is done for a given length of resonator,radius of mirror and the laser resonator’s transverse modes are obtained by using MATLAB software.Results of the simulation demonstrate spatial distribution of the self-reproduction model in different modes of optical resonator.In the experiment,the Ti:sapphire FS laser is selected,output wavelength and pulse width of this laser are 800 nm,120 fs respectively.The experiments prove that laser light field distribution is very consistent with the simulation results.It confirms that the theoretical model is correct.
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段存丽,王涛,范明国,王振宇.激光谐振腔近场自再现模式分布的研究[J].激光与红外,2014,44(5):496~501 DUAN Cun-li, WANG Tao, FAN Ming-guo, WANG Zhen-yu. Research on the distribution of near-field self-reproducing mode in laser resonator[J]. LASER & INFRARED,2014,44(5):496~501