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为简化高功率激光器谐振腔结构,提高激光谐振腔的稳定性,增加基模体积,改善光束质量,提出了两种新型激光谐振腔结构,分别是带角隅反射镜的激光谐振腔和直角内圆锥面反射镜激光谐振腔。使用高功率脉冲CO2激光器,研究了这两种激光谐振腔的输出特性和腔镜失调的关系,并结合平凹稳定腔,对三种激光谐振腔的抗失调稳定性进行了对比。实验结果表明,随着全反镜或平面输出镜失调角的增加,角隅腔激光器的单脉冲输出能量下降速度小于直角内圆锥面全反镜腔。两种新型谐振腔全反镜的抗失调稳定性都超过平面输出镜。角隅全反镜谐振腔和直角内圆锥面全反镜谐振腔的抗失调稳定性均大大超过平凹稳定腔。
In order to simplify the structure of high-power laser resonator, improve the stability of laser resonator, increase the volume of fundamental mode and improve the beam quality, two new laser resonator structures are proposed, which are laser resonator with corner reflector and Conical mirror laser resonator. Using high-power pulsed CO2 laser, the relationship between the output characteristics of these two kinds of laser resonators and the misalignments of the mirrors was studied. The stability of the three kinds of laser resonators was compared with the stability of the cavity. Experimental results show that with the increase of the angle of misalignment of the total or planar output mirror, the single-pulse output energy of the corner cavity laser declines less than the full-mirror cavity of the right-angle inner cone. The anti-misalignment stability of the two new resonant cavity total mirrors exceeds the plane output mirror. Corner anti-mirror resonant cavity and right-angle inner conical mirror all the anti-mirror resonator stability greatly exceeded the stability of flat-depression cavity.