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为获得中心波长9.3μm激光的高功率输出,利用高功率脉冲CO2激光器进行选支实验研究。采用腔镜镀膜选支技术,通过控制对不同波长的透射率或反射率参数,在稳定腔和非稳腔中都得到了中心波长9.3μm激光的单谱线输出。在相同工作参数下,稳定腔中心波长9.3μm激光的能量为其原中心波长10.6μm激光的95%,非稳腔中心波长9.3μm激光的能量为其原中心波长10.6μm激光的93%,两种腔型中心波长9.3μm激光热敏纸光斑颜色与中心波长10.6μm激光的有明显不同。实验表明,采用腔镜镀膜选支技术在稳定腔和非稳腔中都能获得中心波长9.3μm激光的单谱线输出,且激光能量与原腔型输出中心波长10.6μm激光的基本相当。激光热敏纸光斑显示出在相同单脉冲能量作用下,中心波长9.3μm激光对物质的冲蚀作用高于中心波长10.6μm的激光。
In order to obtain the high power output of the central wavelength of 9.3μm laser, an optional experimental study was carried out by using a high power pulsed CO2 laser. With the support technology of endoscopic coating, by controlling the transmittance or reflectance parameters for different wavelengths, single-line output of the central wavelength 9.3 μm laser is obtained in the stable cavity and the unstable cavity. Under the same operating parameters, the energy of the 9.3μm laser at the center of the stable cavity is 95% of the laser at the original central wavelength of 10.6μm, the energy of the 9.3μm laser at the center of the unstable cavity is 93% of the laser at the original central wavelength of 10.6μm, Cavity center wavelength of 9.3μm Laser thermal paper spot color and center wavelength of 10.6μm laser is significantly different. The experiment shows that the single-line output with center wavelength of 9.3μm can be obtained by using the endoscope-coated alternative support technology in the stable cavity and unstable cavity, and the laser energy is almost the same as that of the laser with 10.6μm wavelength. Laser thermal paper spot shows that under the same single-pulse energy, the central wavelength of 9.3μm laser has a higher erosive effect on the material than the central wavelength of 10.6μm laser.